MYMGM1R824ELA5RN

Document Category: Datasheet 

## **MYMGM1R824ELA5RN** 

## MonoBK™ 24A DC–DC Converter Series 

## **Product Description** 

The **MYMGM1R824ELA5RN** is miniature 

MonoBK™ called “Mono Block”, non-isolated Pointof-Load (PoL) DC-DC power converters for embedded applications. The small form factor measures only 10.5 x 9.0 x 5.0mm. 

The converter has input voltage ranges of 7.5 to 15V and a maximum output current of 24A. Based on a fixed frequency synchronous buck converter switching topology, this high power conversion efficient PoL module features programmable output voltage 0.7 to 1.8V, ON/OFF control, Power Good (PGOOD) signal output and PMBus[TM] ALERT output. 

This product also includes under voltage lock out (UVLO), output short circuit protection(SCP), overcurrent protection (OCP), over-voltage protection (OVP). under-voltage protection (UVP) and overtemperature protection (OTP). 

## **Efficiency** 

VIN = 12V, VOUT = 1.8V, TA = 25degC 

Moreover this converter has PMBus[TM] interface so various parameters can be handled and monitored by digital signals. 

## **Features** 

- Settable output voltage from 0.7 to 1.8V 

- Up to 24A of output current 

- Quick response to load change 

- Ultra small surface mount package 10.5 x 9.0 x 5.0mm 

- High efficiency of 94.0% (max.) 

- Outstanding thermal derating performance 

- Over Current (OC) /Voltage (OV), Under Voltage (UV) protection and Over Temperature protection (OT). 

- ON/OFF control (Positive logic) 

**Figure 1. Efficiency Curve** 

## **Simplified Application Circuit** 

- Power Good (PGOOD) signal 

- High Reliability / Temperature Cycle Test 700cycle (-40 to +125degC) 

- PMBus[TM] interface available 

- PMBus[TM] 1.3 ready 

- Minimum VOUT setting resolution 2mV/bit 

## **Typical Applications** 

- PCIe / Server applications 

- FPGA and DSP 

- Datacom / Telecom systems 

**Figure 2. Simplified Circuit Diagram** 

- Distributed bus architectures (DBA) 

- Programmable logic and mixed voltage 

**http://www.murata.com/products/power** 

Copyright ©2023 Murata Manufacturing Co., Ltd. All rights reserved. Specifications are subject to change without notice. 

Document Number: D90DH - 00218 / Export Control Code : X0863 MYMGM1R824ELA5RN A02(Jul-2023) Page 1 of 41 

**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

## MonoBK™ 24A DC–DC Converter Series 

**==> picture [234 x 620] intentionally omitted <==**

**----- Start of picture text -----**<br>
||||
|---|---|---|
|Product Description ............................................................. 1|
|Features ............................................................................. 1|
|Typical Applications ............................................................. 1|
|Simplified Application Circuit ................................................ 1|
|Performance Specifications Summary and Ordering Information 3|
|Top Marking Specifications ................................................... 3|
|Pin Configuration ................................................................. 4|
|Pin Function and Descriptions .............................................................................. 4|
|Absolute Maximum Ratings ................................................... 5|
|Recommended Operating Conditions ..................................... 5|
|Package Thermal Characteristics ........................................... 5|
|Electrical Characteristics ...................................................... 6|
|Electrical Characteristics Table............................................................................. 6|
|Typical Performance Characteristics ...................................... 8|
|Thermal Deratings (Reference Data) .................................................................. 11|
|Transient Response Data ................................................................................... 11|
|Test Circuit ....................................................................... 12|
|Detailed Description ........................................................... 13|
|Input Under-Voltage Shutdown and Start-Up Threshold .................................... 13|
|Start-Up Time ...................................................................................................... 13|
|Output Noise ....................................................................................................... 13|
|Minimum Output Loading Requirements ............................................................ 14|
|Thermal Shutdown .............................................................................................. 14|
|Temperature Derating Curves ............................................................................ 14|
|Output Current Limiting ....................................................................................... 14|
|Output Short Circuit Condition ............................................................................ 14|
|Power Good (PGOOD) ....................................................................................... 14|
|PMBus|[TM]|Alert (ALT#) ......................................................................................... 15|
|UVP/OVP Function ............................................................................................. 15|
|Enable (EN) ......................................................................................................... 15|
|Output Capacitive Load....................................................................................... 16|
|Output Voltage Adjustment ................................................................................. 16|
|Output Voltage Remote Sense ........................................................................... 16|
|PMBus|[TM]|Serial Interface Description .................................... 17|
|Multi Address....................................................................................................... 17|
|Start and Stop Conditions ................................................................................... 17|
|PMBus|[TM]|Update Sequence ............................................................................... 18|
|Protocol Usage .................................................................................................... 18|
|PMBus|[TM]|Bus message format ........................................................................... 18|
|Packet Error Checking (PEC) ............................................................................. 18|
|PMBus|[TM]|Alert Response Address (ARA) .......................................................... 18|
|Data and Numerical Formats .............................................................................. 19|
|PMBus|[TM]|Communication Failure ....................................................................... 19|
|PMBus|[TM]|Reporting and Status Monitoring ........................................................ 19|
|Communication Pattern....................................................................................... 19|
|PMBus|[TM]|Register Map ....................................................................................... 20|
|Application Information ...................................................... 30|
|Application Circuit ............................................................................................... 30|
|Application Circuit Part List ................................................................................. 30|
|Example of Pattern Layout (Top View) ............................................................... 31|
|Application Board Example ................................................................................. 31|
|Component Selection ......................................................... 32|
|Input Fuse ........................................................................................................... 32|
|Recommended Input Filtering ............................................................................. 32|
|Recommended Output Filtering .......................................................................... 32|

**----- End of picture text -----**<br>


**Packaging Information ........................................................ 33** Package Drawing ................................................................................................ 33 Recommended Board Land Pattern (Top View) ................................................ 34 **Tape and Reel Information ................................................... 35** Tape Dimension .................................................................................................. 35 Reel Dimension .................................................................................................. 35 Tape Specifications ............................................................................................ 36 **Soldering Guidelines .......................................................... 36** Recommended Lead-free Solder Reflow Profile ................................................ 37 Pb-free Solder Processes ................................................................................... 37 Dry Pack Information .......................................................................................... 37 **Revision History ........................................................... 38 Notices ............................................................................. 39** Scope .................................................................................................................. 39 Limitation of Applications .................................................................................... 39 Fail-Safe Function ............................................................................................... 40 Product Specification .......................................................................................... 40 Contact Form ...................................................................................................... 40 **Disclaimers ....................................................................... 41** Patent Statement ................................................................................................ 41 Copyright and Trademark ................................................................................... 41 

## **http://www.murata.com/products/power** 

Copyright ©2023 Murata Manufacturing Co., Ltd. All rights reserved. Specifications are subject to change without notice. 

Document Number: D90DH - 00218 / Export Control Code : X0863 MYMGM1R824ELA5RN A02(Jul-2023) Page 2 of 41 

**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

MonoBK™ 24A DC–DC Converter Series 

## **Performance Specifications Summary and Ordering Information** 

## **Table 1. Performance Specifications Summary and Ordering Information** 

|**PART NUMBER**|**OUTPUT**|**OUTPUT**|**INPUT**|**INPUT**|**INPUT**|**Efficiency**<br>**[%]**|**EN**|**Package**<br>**[mm]**|**MSL**|**Quantity/**<br>**Packing**|
|---|---|---|---|---|---|---|---|---|---|---|
||**VOUT**<br>**[V]**|**IOUT**<br>**(max.)**<br>**[A]**|**VIN**<br>**(typ.)**<br>**[V]**|**Range**<br>**[V]**|**IIN**<br>**full load**<br>**[A]**||||||
|MYMGM<br>1R824ELA5RN<br>~~a~~|0.7-<br>1.8<br>~~ee~~|24<br>~~ee~~|12|7.5-<br>15.0|6.5<br>~~ee~~|89.2<br>~~ee~~|Yes<br>(Positive)<br>~~ee~~|10.5 x 9.0 x 5.0<br>LGA<br>~~ee~~|3|400 units/T&R|
|MYMGM<br>1R824ELA5RND<br>~~a~~|0.7-<br>1.8<br>~~ee~~|24<br>~~ee~~|12|7.5-<br>15.0|6.5<br>~~ee~~|89.2<br>~~ee~~|Yes<br>(Positive)<br>~~ee~~|10.5 x 9.0 x 5.0<br>LGA<br>~~ee~~|3|100 units/T&R|



1.All specifications are at typical line voltage, VOUT = 1.8V and full load, +25degC unless otherwise noted. Output capacitors are 220uF x 3 ceramic. Input capacitors are 22uF x 2 ceramic and plenty electrolytic capacitors. See detailed specifications. Input and Output capacitors are necessary for our test equipment. 

2.Use adequate ground plane and copper thickness adjacent to the converter. 

**==> picture [499 x 243] intentionally omitted <==**

**----- Start of picture text -----**<br>
Table 2. Part Numbering<br>MY  MGM  1R8  24  E  L  A  5  R  N  D<br>Murata Product<br>Packaging Code<br>Maximum Output  Internal Code  Maximum<br>Series Name  Current  Height  Internal Code  Blank: Standard Quantity D: Small Quantity<br>24: 24A  5: 5-6mm<br>> T rerrere<br>Maximum Output  Input Voltage Range  Maximum Side Size  Internal Code<br>Voltage  E: 7.5-15.0V  A: 10-11mm<br>1R8: (0.7-1.8V)<br>ee<br>Top Marking Specifications<br>Because of the small size of these products, the product marking contains a character-reduced code to indicate<br>the model number and manufacturing date code. Not all items on the marking are always used. Please note that<br>the marking differs from the product photograph. Here is the layout of the marking.<br>**----- End of picture text -----**<br>


|<br>M1R8<br>24ELA5<br>y|<br>y|**Table 3. Code Description**<br>**CODE**<br>**DESCRIPTION**<br>Pin 1 Marking<br>M1R824ELA5RN<br>Product code<br>(Please see product code table<br>beside)<br>Internal manufacturing code<br>**PART NUMBER**<br>**PRODUCT CODE**<br>MYMGM1R824ELA5RN<br>M1R824ELA5RN<br>**Table 4. Product Code Table**<br>~~Ch~~<br>~~(ee~~<br>~~a~~<br>~~—_=~~|
|---|---|---|



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C M  M1R8<br>24ELA5<br>RN<br>F y<br>Figure 3. Top Marking Specification<br>**----- End of picture text -----**<br>


|**PART NUMBER**<br>~~Ch~~<br>~~—_=~~|**PRODUCT CODE**<br>~~—_=~~|
|---|---|
|MYMGM1R824ELA5RN<br>~~Ch~~<br>~~—_=~~|M1R824ELA5RN<br>~~—_=~~|
|MYMGM1R824ELA5RND<br>~~Ch~~<br>~~—_=~~|M1R824ELA5RN<br>~~—_=~~|



**http://www.murata.com/products/power** 

Copyright ©2023 Murata Manufacturing Co., Ltd. All rights reserved. Specifications are subject to change without notice. 

Document Number: D90DH - 00218 / Export Control Code : X0863 MYMGM1R824ELA5RN A02(Jul-2023) Page 3 of 41 

**MYMGM1R824ELA5RN** Document Category: Datasheet 

MonoBK™ 24A DC–DC Converter Series 

## **Pin Configuration** 

|G1<br>DNC<br>F1<br>VIN<br>E1<br>VIN<br>D1<br>VIN<br>C1<br>GND<br>B1<br>GND<br>A1<br>CLK<br>G2<br>AGND<br>F2<br>VIN<br>E2<br>VIN<br>D2<br>VIN<br>C2<br>GND<br>B2<br>GND<br>A2<br>DATA<br>JOO0o0o0ca<br>ToOooooo||
|---|---|
|G3<br>TRIM<br>F3<br>GND<br>E3<br>GND<br>D3<br>GND<br>B3<br>GND<br>A3<br>ALERT<br>C3<br>GND<br>qToOgoo0o0cg||
|G4<br>+SENS<br>E<br>F4<br>GND<br>E4<br>GND<br>D4<br>GND<br>C4<br>GND<br>B4<br>GND<br>A4<br>EN<br>G5<br>DNC<br>F5<br>GND<br>E5<br>GND<br>D5<br>GND<br>C5<br>GND<br>B5<br>GND<br>A5<br>PGOO<br>D<br>G6<br>ADDR<br>F6<br>GND<br>E6<br>GND<br>D6<br>GND<br>C6<br>GND<br>B6<br>GND<br>A6<br>DNC<br>JOOo0o0o00<br>ToOoOooog<br>ToOoooo0g||
|G7<br>DNC<br>F7<br>GND<br>E7<br>GND<br>D7<br>VOUT<br>C7<br>VOUT<br>B7<br>VOUT<br>A7<br>DNC<br>ToOoOooog||
|G8<br>DNC<br>F8<br>GND<br>E8<br>GND<br>D8<br>VOUT<br>C8<br>VOUT<br>B8<br>VOUT<br>A8<br>VOUT<br>TOOOOUOd||



**Figure 4. Module Terminals (Top View)** 

## **Pin Function and Descriptions** 

**Table 5. Pin Function and Descriptions** 

|**PIN No.**|**Table 5. Pin Function and Descriptions**<br>**NAME**|**Table 5. Pin Function and Descriptions**<br>**FUNCTION and DESCRIPTION**|
|---|---|---|
|A1<br>~~oo~~|CLK<br>~~oo~~|PMBusTMClock.<br>~~oo~~|
|A2<br>~~oo~~|DATA<br>~~oo~~|PMBusTMdata.<br>~~oo~~|
|A3<br>~~oo~~|ALERT<br>~~oo~~|PMBusTMalert pin. ALT is active low. A pull-up resistor connected to 3.3V is required<br>if the ALT function is needed.<br>~~oo~~|
|A4<br>~~—~~|EN<br>~~30~~|PMBusTMcontrol pin. EN is a digital input that turns the converter on or off with<br>proper ON_OFF_CONFIG (02h) configuration. Drive EN high to turn on the<br>regulator. Drive EN low to turn off the regulator. Do not float EN.<br>~~30~~|
|A5<br>~~— ~~<br>~~a~~|PGOOD<br> ~~30~~|Power good output. The output of PGOOD is an open-drain signal. PGOOD requires<br>a pull-up resistor connected to a DC voltage to indicate high if the output voltage is<br>higher than 90% of the nominal voltage. There is a PGOOD delay from low to high.<br>PGOOD must be pulled high to ensure proper operation.<br>~~30~~|
|A6<br>~~——————~~|DNC<br>~~——————~~|Do not connect pins. Those pins must be left floating individually.<br>~~——————~~|
|A7<br>~~——————~~|DNC<br>~~——————~~|Do not connect pins. Those pins must be left floating individually.<br>~~——————~~|
|A8, B7, B8, C7, C8, D7, D8<br>~~——————~~|VOUT<br>~~——————~~|Power output voltage.<br>~~——————~~|
|B1-B6, C1-C6, D3-D6,<br>E3-E8, F3-F8<br>~~——————~~|GND<br>~~——————~~|Ground pins. Connect to the GND plane.<br>~~——————~~|
|D1, D2, E1, E2, F1, F2<br>~~——————~~<br>~~ee~~|VIN<br>~~——————~~|Power input voltage.<br>~~——————~~|
|G1<br>~~ee~~|DNC|Do not connect pins. Those pins must be left floating individually.|
|G2<br>~~ee~~|AGND|Analog GND|
|G3<br>~~ee~~|TRIM|Output voltage setting pin. The divider resistor must be located between GND to set<br>output voltage correctly. Tie the TRIM pins of each phase together.|
|G4<br>~~ee~~<br>~~a~~|+SENSE|Output voltage sense positive return. Connect VOUT +SENSE to the output voltage<br>sense of the load directly.|
|G5<br>~~a~~|DNC<br>|Do not connect pins. Those pins must be left floating individually.<br>|
|G6<br>~~aa~~|ADDR<br>~~a~~|PMBusTMslave address-setting pin. Connect a resistor from ADDR to GND to set<br>the address of this device.<br>~~a?77~~|
|G7<br>~~a~~|DNC<br>~~a~~|Do not connect pins. Those pins must be left floating individually.<br>~~a?77~~|
|G8<br>~~a~~|DNC<br>~~a~~|Do not connect pins. Those pins must be left floating individually.<br>~~a?77~~|



**MYMGM1R824ELA5RN** Document Category: Datasheet 

## MonoBK™ 24A DC–DC Converter Series 

## **Absolute Maximum Ratings**[(1)(2)] 

## **Table 6. Absolute Maximum Ratings** 

|**PARAMETER**|**MIN**|**MAX**|**UNITS**|
|---|---|---|---|
|VIN|-0.3|16|V|
|EN,PGOOD,CLK,DATA,ADDR,ALERT|-0.3|3.9|V|
|VOUT|0.7|2.0|V|
|Output Current  (IOUT)|0|24|A|
|Storage Temperature(Tstg)|-40|125|degC|
|Soldering / Reflow Temperature(3)|-|250|degC|
|Maximum Number of Reflows Allowed|-|1||
|ESD Tolerance,HBM(4)|-|±1000|V|
|Notes:||||



(1) The application of any stress beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device, and exposure at any of these ratings for extended periods may reduce the reliability of the device. The above “Absolute Maximum Ratings” are stress ratings only; the notation of these conditions does not imply functional operation of the device at these or any other conditions that fall outside of the range identified by the operational sections of this specification. 

(2) All Voltage are with respect to GND plane. 

(3) Recommended Reflow profile is written in “Soldering Guidelines”. 

(4) Human body model, per the JEDEC standard JS-001-2012. 

## **Recommended Operating Conditions**[ (1)] 

## **Table 7. Recommended Operating Conditions** 

|**PARAMETER**|**MIN**|**MAX**|**UNITS**|
|---|---|---|---|
|InputVoltage (VIN)|7.5|15|V|
|Ambient Temperature (TA)(2)|-40|105|degC|
|Junction Temperature (TJ)(2)|-40|125|degC|
|Output Current (IOUT)|0|24|A|
|Notes:<br>(1) Device should not be operated outside the operating conditions. The reliability is tested at the maximum voltage of the recommended<br>operating condition. Above of recommended operation may reduce reliability of the device.<br>(2) See the temperature derating curves in the thermal deratings. However, do not condensate.||||



(1) Device should not be operated outside the operating conditions. The reliability is tested at the maximum voltage of the recommended operating condition. Above of recommended operation may reduce reliability of the device. 

(2) See the temperature derating curves in the thermal deratings. However, do not condensate. 

## **Package Thermal Characteristics** 

## **Table 8. Package Thermal Characteristics** 

||**PARAMETER**||||**CONDITIONS**|**TYP**|**UNITS**|
|---|---|---|---|---|---|---|---|
|Junction-to-top Characterization Parameter (Ψ|Junction-to-top Characterization Parameter (Ψ|Junction-to-top Characterization Parameter (Ψ|Junction-to-top Characterization Parameter (ΨJT)|VIN =12V, V<br>VIN= 12V|12V, VOUT =1.8V, IOUT =24A<br>= 12V,VOUT= 1.8V,IOUT= 12A|1.5<br>2.0|degC/W<br>degC/W|



Notes: 

（ 1 ） The thermal resistance is only reference data, and it is measured  with our evaluation board as below. 50.8mm x 60.0mm x 1.6mm (8 Layers, 2oz copper each) FR-4. 

**http://www.murata.com/products/power** 

Copyright ©2023 Murata Manufacturing Co., Ltd. All rights reserved. Specifications are subject to change without notice. 

Document Number: D90DH - 00218 / Export Control Code : X0863 MYMGM1R824ELA5RN A02(Jul-2023) Page 5 of 41 

**MYMGM1R824ELA5RN** Document Category: Datasheet 

## MonoBK™ 24A DC–DC Converter Series 

## **Electrical Characteristics**[(1)] 

## **Electrical Characteristics Table** 

VIN  = 12V, IOUT  = 24A, TA = 25degC, unless otherwise noted 

**Table 9. Electric Characteristics Table** 

|**PARAMETER**<br>~~Cn~~|**SYMBOL**<br>|**CONDITIONS**<br>|**MIN**<br>|**TYP**<br>|**MAX**<br>|**UNITS**<br>|
|---|---|---|---|---|---|---|
|**INPUT SUPPLY**<br>~~Cn~~|||||||
|Input Voltage<br>~~Cn~~|VIN<br><br>~~es~~|~~es~~|7.5<br><br>~~es~~|12<br><br>~~es~~|15<br><br>~~es~~|V<br>|
|VINUnder Voltage Lockout<br>Threshold, VINRising<br>~~es~~|VIN_UVH<br>~~es~~<br>~~es~~|IOUT= 0A<br>~~es~~<br>~~es~~|-<br>~~es~~<br>~~es~~|7.25<br>~~es~~<br>~~es~~|-<br>~~es~~<br>~~es~~|V<br>~~es~~|
|VINUnder Voltage Lockout<br>Threshold, VINFalling(11)|VIN_UVL<br>~~es ~~|IOUT= 0A<br> ~~es ~~|-<br> ~~es ~~|6.75<br> ~~es~~|-<br>~~es~~|V|
|VINCurrent Supply,Full load|IIN_FULL|VIN= 12V,VOUT= 1.8V,IOUT= 24A|-|4.1|-|A|
|VINCurrent Supply,Switching<br>~~ef~~|IIN_SW<br>~~ef~~|VIN= 12V,IOUT= 0A<br>~~ef~~|-<br>~~ef~~|100<br>~~ef~~|-<br>~~ef~~|mA<br>~~ef~~|
|VINCurrent Supply,Shutdown<br>~~ef~~<br>~~|~~|IIN_SD<br>~~ef~~<br>~~|~~|VIN= 12V,EN = 0V<br>~~ef~~<br>~~|~~|-<br>~~ef~~<br>~~|~~|1<br>~~ef~~<br>~~|~~|-<br>~~ef~~<br>~~|~~|mA<br>~~ef~~<br>~~|~~|
|**ENABLE INPUT(EN PIN)**<br>~~rsGs~~|||||||
|Threshold High<br>~~rs~~|VTH_ENH<br>~~Gs~~|~~Gs~~|2.15<br>~~Gs~~|-<br>~~Gs~~|-|V|
|Threshold Low<br>~~rs~~<br>~~ef~~|VTH_ENL<br>~~Gs~~<br>~~ef~~|~~Gs~~<br>~~ef~~|-<br>~~Gs~~<br>~~ef~~|-<br>~~Gs~~<br>~~ef~~|1.2<br>~~ef~~|V<br>~~ef~~|
|EN Pin Input Current<br>~~ef~~<br>~~Ce~~|IEN<br>~~ef~~<br>~~Ce~~|VIN= 12V,EN = 3.3V,IOUT= 0A<br>~~ef~~|-<br>~~ef~~|10<br>~~ef~~|**-**<br>~~ef~~|uA<br>~~ef~~|
|**CONVERTER**<br>~~Ce~~|||||||
|Efficiency<br>~~Ce~~|EFF<br>~~Ce~~<br>~~Gr~~|VIN= 12.0V, VOUT= 1.8V,<br>IOUT =24A|-|89.2|-|%|
|||VIN= 12.0V, VOUT= 1.0V,<br>IOUT =24A|-|84.0|-||
|Fixed SwitchingFrequency<br>~~rs~~|FSW<br>~~rs~~<br>~~Gr~~|~~rs~~|-<br>~~rs~~|400<br>~~rs~~|-<br>~~rs~~|kHz<br>~~rs~~|
|Start-up Time(Vin ON)|TSTART_UP<br>~~Gr~~<br>|VOUT= 1.8V<br>(VOUT= 5% to 90% of VOUT)|-|2|-|ms|
|Start-up Time(Enable ON)<br>~~CC~~||VOUT= 1.8V<br>(VOUT= 5% to 90% of VOUT)<br>|-<br>|2<br>|-<br>|ms<br>|
|**POWER GOOD(PGOOD PIN)(4)**<br>~~CC~~|||||||
|PGOOD Sink Current<br>~~CC~~|IS_PG<br><br>~~ee ee~~|~~ee~~|-<br><br>~~ee~~|-<br><br>~~ee~~|5<br><br>~~ee~~|mA<br><br>~~ee~~|
|PGOOD Low Level Output<br>Voltage<br>~~ee~~|VL_PG<br>~~ee~~<br>~~ee ee~~|~~ee~~<br>~~ee~~|-<br>~~ee~~<br>~~ee~~|-<br>~~ee~~<br>~~ee~~|1.0<br>~~ee~~<br>~~ee~~|V<br>~~ee~~<br>~~ee~~|
|PGOOD TRUE (HI)|VTH_PGH<br>~~ee ee~~|VOSETmeans set voltage.<br>~~ee ~~|(VOSETx 90%) < VOUT<<br>(Vosetx 115%)<br> ~~ee ee ~~|||V<br> ~~ee~~|
|PGOOD FALSE (LO)<br>~~Co~~|VTH_PGL||Out of above range|||V|
|**OUTPUT**<br>~~Co~~<br>~~rr~~|||||||
|Output Current**(2)**<br>~~Co~~<br>~~rs~~|IOUT<br>~~rs~~<br>~~rr~~|~~rs~~|0<br>~~rs~~|-<br>~~rs~~|24<br>~~rs~~|A<br>~~rs~~|
|Output Voltage(9)|VOUT<br>~~rr~~<br>~~ee ee~~|~~ee~~|0.7<br>~~ee~~|-<br>~~ee ee~~|1.8<br>~~ee~~|V<br>~~ee~~|
|Total Output Voltage<br>Accuracy(7)(14)<br>~~ee~~|VOUT_ACC<br>~~ee~~<br>~~ee ee~~<br>~~Gr~~|~~ee~~<br>~~ee~~|-3.0<br>~~ee~~<br>~~ee~~|-<br>~~ee~~<br>~~ee ee~~|+3.0<br>~~ee~~<br>~~ee~~|%<br>~~ee~~<br>~~ee~~|
|Line Regulation(15)<br>~~rs~~|VOUT_LINE<br>~~ee ee~~<br>~~rs~~<br>~~Gr~~<br>~~Gr~~|VIN= min. to max.<br>~~ee~~<br>~~rs~~|-<br>~~ee~~<br>~~rs~~|±0.5<br>~~ee ee~~<br>~~rs~~|-<br>~~ee~~<br>~~rs~~|%<br>~~ee~~<br>~~rs~~|
|Load Regulation(15)<br>~~rs~~|VOUT_LOAD<br>~~Gr~~<br>~~rs~~<br>~~Gr~~|IOUT= min. to max.<br>~~rs~~|-<br>~~rs~~|±0.5<br>~~rs~~|-<br>~~rs~~|%<br>~~rs~~|
|Temperature Variation(15)|VOUT_TEMP<br>~~Gr~~<br>~~ee ee~~|-40 ≤ TA≤ 105degC<br>~~ee~~|-<br>~~ee~~|±1.5<br>~~ee~~|-<br>~~ee~~|%<br>~~ee~~|
|Dynamic Load Peak<br>Deviation(14)<br>~~ee~~|VOUT_DYN<br>~~ee~~<br>~~ee ee~~|VIN= 12V, VOUT= 1.0V,<br>IOUT=50-100%<br>~~ee~~<br>~~ee~~|-<br>~~ee~~<br>~~ee~~|±3.0<br>~~ee~~<br>~~ee~~|-<br>~~ee~~<br>~~ee~~|%<br>~~ee~~<br>~~ee~~|
|Ripple and Noise<br> (20MHz bandwidth)(6)|VRIP<br>~~ee ee~~|~~ee ~~|-<br> ~~ee~~|5<br>~~ee~~|30<br>~~ee ~~|mV<br>pk-pk<br> ~~ee~~|
|External Output Capacitance<br>Range(10)|COUT||660|-|5000|uF|



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**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

## MonoBK™ 24A DC–DC Converter Series 

|**PARAMETER**|**SYMBOL**|**CONDITIONS**|**MIN**|**TYP**|**MAX**|**UNITS**|
|---|---|---|---|---|---|---|
|**PROTECTION**|||||||
|Over Current Protection<br>Threshold|IOCPTH|HICCUP operating(5)|-|36|-|A|
|Over Voltage Protection(12)|VOCPTH||>120|||% of<br>VOUT|
|Under Voltage Protection|VUVPTH||< 70|||% of<br>VOUT|
|Thermal Protection(8)(13)|TOTPTH|Shutdown operating|-|155|-|degC|
|Thermal Protection<br>Hysteresis(8)(13)|TOTPHYS||-|20|-|degC|
|**ENVIRONMETAL**|||||||
|Moisture SensitivityLevel|||3||||
|Calculated MTBF**(3)**||TA= 40degC, VIN= 12.0V,<br>VOUT =1.8V, IOUT =50%|-|8.45x<br>106|-|hours|



## Notes 

- (1) Specifications are typical at +25degC, VIN = 12.0V. (MYMGM1R824ELA5RN), VOUT = 1.8V, full load, external capacitors and natural convection unless otherwise indicated. All model is tested and specified with external 220uF x 3 ceramic output capacitors, 22uF x 2 (for MYMGM1R824ELA5RN) ceramic and plenty electrolytic external input capacitors. All capacitors are low ESR types. These capacitors are necessary to accommodate our test equipment and may not be required to achieve specified performance in your applications. However, Murata recommends installation of these capacitors. Please refer the test circuit. Several parameters can be changed by PMBus[TM] . (See PMBus[TM] register map) 

- (2) Note that Maximum Power Derating curves indicate an average current at typical input voltage. At higher temperatures and/or no airflow, the converter will tolerate brief full current outputs if the total RMS current over time does not exceed the Derating curve. 

- (3) Mean Time Between Failure is calculated using the Telcordia SR-332 method, +40degC, half output load, natural air convection. 

- (4) The EN Control Input should use either a switch or an open collector/open drain transistor referenced to GND. A logic gate may also be used by applying appropriate external voltages which do not exceed absolute maximum ratings. 

- (5) “Hiccup” overcurrent operation repeatedly attempts to restart the converter with a brief, full-current output. If the overcurrent condition still exists, the restart current will be removed and then tried again. This short current pulse prevents overheating and damaging the converter. Once the fault is removed, the converter immediately recovers normal operation. 

- (6) Output noise may be further reduced by adding an external filter. At zero output current, the output may contain low frequency components which exceed the ripple specification. The output may be operated indefinitely with no load. 

- (7) Regulation specifications describe the deviation as the line input voltage or output load current is varied from a midpoint value to either extreme. 

- (8) Thermal Protection/Shutdown temperature is measured with the sensor in the converter. 

- (9) Do not exceed maximum power specifications when adjusting the output trim. 

- (10) The maximum output capacitive loads depend on the Equivalent Series Resistance (ESR) of the external output capacitor and, to a lesser extent, the distance and series impedance to the load. Larger caps will reduce output noise but may change the transient response. Newer ceramic caps with very low ESR may require lower capacitor values to avoid instability. Thoroughly test your capacitors in the application. 

- (11) Do not allow the input voltage to degrade lower than the input under voltage shutdown voltage at all times. Otherwise, you risk having the converter turn off. The Under-voltage shutdown is not latching and will attempt to recover when the input is brought back into normal operating range. 

- (12) The outputs are intended to sink appreciable reverse current. 

- (13) When the temperature decreases below the turn-in threshold, the converter will automatically restart. 

- (14) About di/dt condition, please refer to the table described later. 

- (15) Ensured by design. Not production tested. 

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**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

## MonoBK™ 24A DC–DC Converter Series 

## **Typical Performance Characteristics** 

In this document, all characteristics are measured with the test board. The schematic and part list of the board are shown in Figure 25 andTable 11. The board is under TA = 25degC with no airflow unless otherwise noted. 

## VOUT = 1.8V 

**==> picture [484 x 537] intentionally omitted <==**

**----- Start of picture text -----**<br>
m— VIN = =—=15V 1.84 VIN<br>_— —_— VIN =15V<br>x 85 < 1.82<br>Wwtb©> 80 _— VIN =1 2V =8°  80° — VV = ININ =12v<br>Seuw 75 — VIN = =7.5V =°= 1.781.76 — VVININ =—=7.5V<br>70 1.75<br>Output Curent Ioyr[A] Output Current lout fA]<br>Figure 5. Efficiency vs. Load Current and Line Voltage  Figure 6. VOUT vs. Load Current and Line Voltage<br>Tek Run Sample 11 Acgs Ciera”) Tek Stopped 10 Acgs Ciera”)<br>VIN 10V/div<br>a VOUT 500mV/div f<br>E<br>mine! WILE ALA Lad A<br>syt Hy i sf Ver uel esi j<br>voy eh ee |<br>PGOOD 5V/div<br>ee EN 5V/div =<br>X:2 us/div<br>c | i"<br>4-hemamal_ ss an im ti L an ran vi an Li L 1 ms/div Civ an an Li ti L an ran vi an Li L Y:2 mV/div<br>chtchs = 5.0Y10.04 ByBy Ch2Cha = S00my5.0¥ = BwBy M1.0msAch4 + SO0kS/s159 2.0 ysipt Chi = 2.0mY¥ % Bw M2.0us2.5GS/sA Chi + -760p¥ IT 80.0psipt<br>Figure 6. On/Off Enable wave form (VIN = 12V, lOUT = 24A)  (VIN = 12V, lFigure 5. Output Ripple and Noise  OUT = 24A, COUT = 660µF, ScopeBW = 20MHz)<br>Figure 7. On/Off Enable Waveform  at 25degC (VIN=12V, VOUT=1.8V, lOUT=24A)  at 25degC (VOUT=1.8V, COUT=660µF, ScopeBW=20MHz)  Figure 8. Output Ripple and Noise<br>Tek Run Sample 24 Acgs Cmena”) Tek Stopped Single Seq 1 Acgs wo Ciera”)<br>ΔV=23mV VOUT(AC) 50mV/div ΔV=26mV VOUT(AC) 50mV/div<br>2 [ ea ΔV=19mV " 2 . |<br>IOUT 20A/div<br>iE IOUT 20A/div<br>a riiil 4 4 poi an an riiil an an 40us/div baa fan fan im ti L an an vi an Li L 40us/div<br>Ch3 20.08 Q Bw Ch2  50.0m¥ % Bw M40.0ysA Ch3 + 12.5MS/s18.04 —80.0nsipt Ch3 20.082 Bw Ch2 = 50.0m¥ % Bw M40.0ysA Ch3 \ 12.5MS/s18.04 —80.0nsipt<br>(VIN = 12V, COUT = 660µF, IOUT = 12 to 24A, 2.4A/us)  (VIN = 12V, COUT = 660µF, IOUT = 24 to 12A, 2.4A/us)<br>Figure 7. Step Load Transient Response  Figure 8. Step Load Transient Response<br>(VIN=12V Figure 9. Step Load Transient Response  , VOUT=1.8V, COUT=660µF, IOUT=12 to 24A, 2.4A/µs) (VIN=12V Figure 10. Step Load Transient Response  , VOUT=1.8V, COUT=660µF, IOUT=24 to 12A, 2.4A/µs)<br>**----- End of picture text -----**<br>


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Document Category: Datasheet 

## **MYMGM1R824ELA5RN** 

## MonoBK™ 24A DC–DC Converter Series 

VOUT = 1.0V 

**==> picture [514 x 554] intentionally omitted <==**

**----- Start of picture text -----**<br>
— VIN =15V<br>VIN =15V<br>= 85 = 1.01<br>uwim b=J<br>Ww VIN = 3 VIN<br>A 3 1.00<br>7 80 =12V FYS 0.99: — ey<br>ii 75 VIN 3 VIN<br>=7.8V 6 0.98 =75V<br>70<br>0 5 10 15 20 25 0.97<br>3 z 7 1 _ 35<br>Output Current lour A] Output Current lou [A]<br>Figure 11. Efficiency vs. Load Current and Line Voltage  Figure 12. VOUT vs. Load Current and Line Voltage<br>Tek — Run Sample 2 Acgs ~ Te (tena) Tek Stopped 23 Acgs (Mena)<br>VIN 10V/div<br>4+ [[]<br>EE<br>crE VOUT 500mV/div r i ai , | rn |<br>HHH +++ H+ . WB a<br>E WAV IVA AG VA! ANAS<br>2 PGOOD 5V/div -<br>pee OE EN 5V/div E<br>X:2 us/div<br>[ | [<br>1 ms/div Y:2 mV/div<br>Chit 100¥ 8 Ch2 500m Bw M1.0ms SO0KS/s ——-2.Oysipt ht 20mV¥ 4 Bw M2.Oys 2508/8 IT 80.Opsigt<br>Cha 5.0Y Bw Ch4  5.0¥ Buy &Chd + 15¥ a Chi + -280pV<br>(VIN = 12V, lOUT = 24A)  (VIN = 12V, lOUT = 24A, COUT = 660µF, ScopeBW = 20MHz)<br>Figure 13. On/Off Enable Waveform  Figure 14. Output Ripple and Noise<br>Tek = Run Sample 11 Acgs (Mena) Tek = Run Sample 63 Acqs a (tena)<br>ΔV=21mV<br>E VOUT(AC) 50mV/div E ΔV=28mV VOUT(AC) 50mV/div<br>rr ΔV=26mV<br>IOUT 20A/div<br>Pete tt eee<br>IOUT 20A/div<br>Figure 10.   40us/div Figure 9.   40us/div<br>Ch2 % Bw M40.0ys 12.5MS/s 80.0nsipt Ch2  50.0mv 4 Bw M40.0us 12.5MS/s 80.0nsipt<br>Ch3 2004 Q Bw & ch3 ff 20.08 Ch3 20.04 9 Bw A Ch3 ~ 20.08<br>(VIN = 12V, COUT = 660µF, IOUT = 12 to 24A, 2.4A/us)  (VIN = 12V, COUT = 660µF, IOUT = 24 to 12A, 2.4A/us)<br>Figure 15. Step Load Transient Response Figure 16. Step Load Transient Response<br>**----- End of picture text -----**<br>


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Document Category: Datasheet 

## **MYMGM1R824ELA5RN** 

## MonoBK™ 24A DC–DC Converter Series 

VOUT = 0.7V 

**==> picture [257 x 79] intentionally omitted <==**

**----- Start of picture text -----**<br>
VIN VIN<br>>Sar<br>Ss<br>VIN =12V & 0.70 — = VIN<br>2<br>=3 0.69<br>VIN  =7.5V 5 — VIN<br>**----- End of picture text -----**<br>


**Figure 17. Efficiency vs. Load Current and Line Voltage** 

**Figure 18. VOUT vs. Load Current and Line Voltage** 

**==> picture [203 x 175] intentionally omitted <==**

**----- Start of picture text -----**<br>
VIN 10V/div<br>f VOUT 200mV/div<br>/<br>fi. ing _ in: .<br>/<br>PGOOD 5V/div<br>EN 5V/div<br>“<br>1 ms/div<br>(VIN = 12V, lOUT = 24A)<br>Figure 19. On/Off Enable Waveform<br>**----- End of picture text -----**<br>


**==> picture [40 x 16] intentionally omitted <==**

**----- Start of picture text -----**<br>
X:2 us/div<br>Y:2 mV/div<br>**----- End of picture text -----**<br>


**==> picture [207 x 19] intentionally omitted <==**

**----- Start of picture text -----**<br>
(VIN = 12V, lOUT = 24A, COUT = 660µF, ScopeBW = 20MHz)<br>Figure 20. Output Ripple and Noise<br>**----- End of picture text -----**<br>


**==> picture [467 x 144] intentionally omitted <==**

**----- Start of picture text -----**<br>
VOUT(AC) 50mV/div ΔV=21mV VOUT(AC) 50mV/div<br>ΔV=28mV<br>Se pp ett ptf tte fee ty t y \<br>IOUT 10A/div IOUT 10A/div |<br>40us/div 40us/div<br>cha 10.08 Bw che SERN) + ew Wa ong Tens 80.0nshpt ces oon @ em Ch2 SO0mv % Bw MM 40.0ys 12SMSie 80.Oneht<br>(VIN = 12V, COUT = 660µF, IOUT = 12 to 24A, 2.4A/us)  (VIN = 12V, COUT = 660µF, IOUT = 24 to 12A, 2.4A/us)<br>Figure 21. Step Load Transient Response  Figure 22. Step Load Transient Response<br>**----- End of picture text -----**<br>


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**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

## MonoBK™ 24A DC–DC Converter Series 

## **Thermal Deratings (Reference Data)** 

**==> picture [19 x 29] intentionally omitted <==**

**----- Start of picture text -----**<br>
VOUT=<br>VOUT=<br>VOUT=<br>**----- End of picture text -----**<br>


**==> picture [113 x 16] intentionally omitted <==**

**----- Start of picture text -----**<br>
Position : Center of the Module<br>Radius : 1mm<br>**----- End of picture text -----**<br>


**Figure 23. Safe Operating Area (VIN = 12.0V)** 

**Figure 24. Temperature Measuring  Area** 

## **Thermal deratings are evaluated in following condition.** 

・ The product is mounted on 50.8mm x 60.0mm x 1.6mm (8 Layer, 2oz copper each) FR-4 board respectively. ・ No forced air flow. 

Surface (Top of the coil) temperature of the product : 110degC (max.) 

## **Transient Response Data** 

Transient response data at various conditions are showed in following table. Minimum output capacitance can serve less than 3% x VOUT of deviation for 12A load change(1A/us). 

|**VOUT[V]**|**VIN[V]**|**COUT[uF] **|**VOLTAGE DEVIATION [mV]**|
|---|---|---|---|
||||**12-24A LOAD STEP (1A/us)**|
|0.7|12|660|21|
|1|||23|
|1.2|||23|
|1.8|||23|



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Document Category: Datasheet 

## **MYMGM1R824ELA5RN** 

## MonoBK™ 24A DC–DC Converter Series 

## **Test Circuit** 

**Figure 25.  Test Circuit** 

*1: If there is a non-negligible parasitic impedance between the power supply and the converter, such as during evaluation, the optional input capacitor “C7” may be required to reduce the impedance. The recommended optional capacitor is an example. Please consider the optimum value for the case. This capacitor is usually an aluminum electrolytic type. It isn't necessary to place the capacitor near the input terminal of the converter. 

*2: Do not connect any additional components between the TRIM pin and VOUT or between the TRIM and +SENSE pins. Use only the specified connections. 

**Table 11. Test Circuit Part List** 

|**REFERENCE**|**VALUE**|**DESCRIPTION**|**PART AND EQUIPMENT**|
|---|---|---|---|
|C1|22uF x 2|Input Capacitor<br>Ceramic capacitor, 22uF, 25V, ±10%, X7R|GRM32ER71E226KE15 (Murata)|
|C2|220uF x 3|Output Capacitor<br>Ceramic capacitor, 220uF, 4V, ±20%, X7U|GRM32EC80G227ME05 (Murata)|
|R21|0 ohm|Chip resistor|RK73Z1JTTD(KOA)|
|R11, R12|-|Chip resistor, 1/10W, ±0.5%<br>The value is determined by the target output voltage.||
|R1,R4|10kohm|Chip resistor, 1/10W, ±5.0%|RK73B1JTTD103J (KOA)|
|R26|-|Chip resistor, 1/10W, ±0.5%<br>The value is determined by the target PMBusTMaddress.||
|D1, D4|3.3V|Zenner Diode|EDZV3.3B (ROHM)|
|C7|1500uF/25V|Electrolysis Capacitor (Optinal)||
|Oscilloscope|-|Digital Oscilloscope|DPO5034 or TDS5034 (Tektronix)|
|Terminator|-|Terminator|TRC-50F2(KEISOKU GIKEN)|



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**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

MonoBK™ 24A DC–DC Converter Series 

## **Detailed Description** 

## **Input Under-Voltage Shutdown and Start-Up Threshold** 

Under normal start-up conditions, converters will not begin to regulate properly until the ramping-up input voltage exceeds and remains at the Start-Up Threshold Voltage (see Specifications). Once operating, converters will not turn off until the input voltage drops below the Under-Voltage Shutdown Limit. Subsequent restart will not occur until the input voltage rises again above the Start-Up Threshold. This built-in hysteresis prevents any unstable EN operation at a single input voltage. 

Users should be aware however of input sources near the Under-Voltage Shutdown whose voltage decays as input current is consumed (such as capacitor inputs), the converter shuts off and then restarts as the external capacitor recharges. Such situations could oscillate. To prevent this, make sure the operating input voltage is well above the UV Shutdown voltage at all times. 

## **Start-Up Time** 

Assuming that the output current is set at the rated maximum, the VIN to VOUT Start-Up Time (see Specifications) is the time interval between the point when the ramping input voltage crosses the Start-Up Threshold and the fully loaded regulated output voltage enters and remains within its specified accuracy band. Actual measured times will vary with input source impedance, external input capacitance, input voltage slew rate and final value of the input voltage as it appears at the converter. 

This converter includes a soft start circuit to moderate the duty cycle of its PWM controller at power up, thereby limiting the input inrush current. 

The EN Remote Control interval from ON command to VOUT regulated assumes that the converter already has its input voltage stabilized above the Start-Up Threshold before the ON command. The interval is measured from the ON command until the output enters and remains within its specified accuracy band. The specification assumes that the output is fully loaded at maximum rated current. Similar conditions apply to the ON to VOUT regulated specification such as external load capacitance and soft start circuitry. 

## **Output Noise** 

This converter is tested and specified for output noise using designated external output components, circuits and layout as shown in the figures below. In the figure below, the two copper strips simulate real-world printed circuit impedances between the power supply and its load. In order to minimize circuit errors and standardize tests between units, scope measurements should be made using BNC connectors or the probe ground should not exceed one half inch and soldered directly to the test circuit. 

**==> picture [93 x 16] intentionally omitted <==**

**----- Start of picture text -----**<br>
C1=220uF x 3 CERAMIC<br>C2=OPEN<br>**----- End of picture text -----**<br>


**Figure 26. Circuits and Layout** 

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**MYMGM1R824ELA5RN** Document Category: Datasheet 

MonoBK™ 24A DC–DC Converter Series 

## **Minimum Output Loading Requirements** 

This converter regulates within specification and are stable under no load to full load conditions. Operation under no load might slightly increase output ripple and noise. 

## **Thermal Shutdown** 

To prevent many over temperature problems and damage, these converters include thermal shutdown circuitry. If environmental conditions cause the temperature of the converter to rise above the Operating Temperature Range up to the shutdown temperature, an on-board electronic temperature sensor will shut down the unit. When the temperature decreases below the turn-on threshold, the converter will automatically restart. 

CAUTION: If you operate too close to the thermal limits, the converter may shut down suddenly without warning. Be sure to thoroughly you’re your application to avoid unplanned thermal shutdown. 

## **Temperature Derating Curves** 

The graph in this data sheet illustrates typical operation under a variety of conditions. The derating curves show the maximum continuous ambient air temperature. Note that these are AVERAGE measurements. Note that the temperatures are of the ambient airflow, not the converter itself which is obviously running at higher temperature than the outside air. Also note that very low flow rates (below about 25 LFM) are similar to “natural convection,” that is, not using fan-forced airflow. We use both thermocouples and an infrared camera system to observe thermal performance. 

CAUTION: This graph is collected at slightly above Sea Level altitude. Be sure to reduce the derating for higher density altitude. 

## **Output Current Limiting** 

Current limiting inception is defined as the point at which full power falls below the rated tolerance. See the Performance/Functional Specifications. Note particularly that the output current may briefly rise above its rated value in normal operation as long as the average output power is not exceeded. This enhances reliability and continued operation of your application. If the output current is too high, the converter will enter the short circuit condition. 

## **Output Short Circuit Condition** 

When a converter is in current-limit mode, the output voltage will drop as the output current demand increases. Following a time-out period, the converter will restart, causing the output voltage to begin ramping up to its appropriate value. If the short-circuit condition persists, another shutdown cycle will initiate. This rapid on/off cycling is called “hiccup mode”. The hiccup cycling reduces the average output current, thereby preventing excessive internal temperatures and/or component damage. A short circuit can be tolerated indefinitely. The “hiccup” system differs from older latching short circuit systems because you do not have to power down the converter to make it restart. The system will automatically restore operation as soon as the short circuit condition is removed. 

## **Power Good (PGOOD)** 

Please refer to the Connection Diagram on page 1 for PGOOD connection. 

The product has a power good (PGOOD) output. PGOOD is the open drain of a MOSFET. Connect PGOOD to Vin or another external voltage source less than 3.6V through a pull-up resistor. After applying the input voltage, the module turns on so that PGOOD is pulled to GND before the soft start is ready. After the Trimming voltage reaches the threshold set internally, PGOOD is pulled high after a delay. 

When the converter encounters any fault (e.g.: UV, OV, OT, UVLO, etc.), PGOOD is latched low and cannot be pulled high again until a new soft start is initialized. 

**==> picture [340 x 105] intentionally omitted <==**

**----- Start of picture text -----**<br>
External Power<br>Supply PGOOD<br>*This terminal should be<br>kept less than 3.6V.<br>| PGOOD<br>Logic Control Circuit<br>Connect to other<br>converter's ON/OFF<br>f<br>terminal etc.<br>Figure 27. PGOOD Internal Circuit Diagram<br>**----- End of picture text -----**<br>


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**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

MonoBK™ 24A DC–DC Converter Series 

## **PMBus[TM] Alert (ALT#)** 

ALT# is active low. A pull-up resistor connected to 3.3V is required if the ALT# function is needed. If any PMBus[TM] warnings appears, this terminal turn to High. 

The CLEAR_FAULTS command is used to reset all stored warning and fault flags. See, Clear Faults command and any Warning commands, if need. 

## **UVP/OVP Function** 

This product monitors a resistor divided feedback voltage to detect over and under voltage. When the feedback voltage becomes lower than 70% of the target voltage, after 1ms, the product turns OFF. The converter restarts after a hiccup delay (about 16ms ). This function is enabled 1.5ms after the Soft-start is completed. When the feedback voltage becomes higher than 120% of the target voltage, the circuit operates sink-mode to decrease output voltage. If the output voltage reaches UV threshold, the device restarts after a hiccup delay. If the OV condition remains, the converter will not start until the OV condition is removed. 

## **Enable (EN)** 

Please refer to the Connection Diagram on page 1 for EN connection. This converter is enabled when the EN pin is pulled high with respect to GND. This device is disabled when the EN pin is grounded or brought to within a low voltage (see Specifications) with respect to GND. 

The ON/OFF function and operation are also controlled by using PMBus[TM] command OPERATION (01h) and ON_OFF_CONFIG (02h) 

as below. 

Dynamic control of the ON/OFF function should be able to sink appropriate signal current when brought low and withstand appropriate voltage when brought high. Be aware too that there is a finite time in milliseconds (see Specifications) between the time of ON/OFF Control activation and stable, regulated output. This time will vary slightly with output load type and current and input conditions. 

**==> picture [376 x 165] intentionally omitted <==**

**----- Start of picture text -----**<br>
TM<br>PMBus  Signal<br>External Power<br>Supply*1<br>EN<br>Open : ON  *This terminal should be  EN control logic of IC<br>Connect : OFF  kept less than 3.6V.<br>TM<br>*1 No need if control by PMBus  only.<br>Recommended application*1<br>**----- End of picture text -----**<br>


**Figure 28. EN Internal Circuit Diagram** 

**Table 12. ON/OFF Control** 

|**OUTPUT**|**OPERATION(01h)**<br>**ON/OFF bit**|**ON_OFF_CONFIG**<br>**(02h)**|**EN PIN**|
|---|---|---|---|
|ON|Ignore|16h(Default)|H|
|OFF|||L|
|ON|ON|1Ah|Ignore|
|OFF|OFF|||
|ON|ON|1Eh|H|
|OFF|OFF||L|
|OFF|OFF||H|
|OFF|ON||L|
|OFF|Ignore|12h|Ignore|
|ON|Ignore|0xh|Ignore|



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**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

MonoBK™ 24A DC–DC Converter Series 

## **Output Capacitive Load** 

Users should only consider adding capacitance to reduce switching noise and/or to handle spike current load steps. Install only enough capacitance to achieve noise objectives. Excess external capacitance may cause regulation problems, degraded transient response and possible oscillation or instability. 

## **Output Voltage Adjustment** 

## Caution 

This converter can be changed output voltage by external resister only. 

This product provides output voltage monitoring through the register of READ_VOUT (8Bh). In order to have correct output voltage setting and monitoring, the external voltage divider (Rtrim) and the registers of VOUT_COMMAND (21h), VOUT_MARGIN_HIGH (25h), VOUT_MARGIN_LOW (26h), VOUT_SCALE_LOOP (29h) should be set correspondingly. The following shows how to set the output voltage. 

1.Determin the Rtrim value using following formula. Rtrim [kohm] =  6 /( VOUT - 0.6 ) 

Then, connect an external trim resistor (Rtrim) between the TRIM pin and GND pin. The Rtrim resistor must be a 1/10W precision metal film type, ±0.5% accuracy or better with low temperature coefficient, ±100 ppm/degC. 

2.Set the VOUT_COMMAND (21h) and the VOUT_SCALE_LOOP(29h) as follows. VOUT_COMMAND: Target Voltage in hexadecimal (Least Significant Bit is 0.002V) VOUT_SCALE_LOOP:  Set following value in hexadecimal VOUT_SCALE_VALUE= 0.6/Target VOUT (Least Significant Bit is 0.001) 

## 3.Set VOUT_MARGIN_HIGH (25h), VOUT_MARGIN_LOW (26h) as follows. 

VOUT_MARGIN_HIGH (25h): VOUT margin (high) voltage in hexadecimal.(Should be set in the range of 100~110% of target VOUT) 

VOUT_MARGIN_LOW (26h): VOUT margin (low) voltage in hexadecimal. (Should be set in the range of 90~100% of target VOUT) (Least Significant Bit is 0.002V respectively) 

The following table shows the Rtrim and PMBus[TM] parameters at particular VOUT for example. 

**Table 13. Rtim Calculation and PMBus™ Parameter Example** 

|**OUTPUT VOLTAGE [V]**|**ESTIMATED RTRIM [kohm]**|**PMBus™ COMMAND PARAMETERS**|**PMBus™ COMMAND PARAMETERS**|**PMBus™ COMMAND PARAMETERS**|**PMBus™ COMMAND PARAMETERS**|
|---|---|---|---|---|---|
|||**21h**|**29h**|**25h**|**26h**|
|0.70|30+30|0x015E<br>(0.70V)|0x0359<br>(0.857)|0x0181<br>(0.77V)|0x013B<br>(0.63V)|
|1.00|15|0x01F4<br>(1.00V)|0x0258<br>(0.600)|0x0226<br>(1.1V)|0x01C2<br>(0.9V)|
|1.20|10|0x0258<br>(1.20V)|0x01F4<br>(0.500)|0x0294<br>(1.32V)|0x021C<br>(1.08V)|
|1.50|4.7+2.0|0x02EE<br>(1.50V)|0x0190<br>(0.400)|0x0339<br>(1.65V)|0x02A3<br>(1.35V)|
|1.80|4.7+0.3|0x0384<br>(1.80V)|0x014D<br>(0.333)|0x03DE<br>(1.98V)|0x032A<br>(1.62V)|



It’s not recommended to change PMBus[TM] parameters when the power stage is enabled. Proper operation of the converter is not guaranteed to do so. 

Do not exceed the specified limits of the output voltage or the converter’s maximum power rating when applying these resistors. 

## **Output Voltage Remote Sense** 

This function is capable to compensate up the voltage drop between the output and input of load. The sense range depend on the maximum voltage allowing on the VOUT pin. The sense trace should be short as possible and shielded by GND line or else to reduce noise susceptibility. The sense line length is recommended within 10cm for output voltage stability. If the remote sense is not needed, +SENSE pin should be connected to VOUT pin. 

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**MYMGM1R824ELA5RN** Document Category: Datasheet MonoBK™ 24A DC–DC Converter Series INNOVATOR IN ELECTRONICS ~~ee~~ 

## **PMBus[TM] Serial Interface Description** 

The Power Management Bus (PMBus[TM] ) is an open-standard power-management protocol that defines a means of communication with power conversion and other devices. 

The PMBus[TM] is a two-wire bidirectional, serial interface, consisting of a data line (DATA or SDA) and a clock line (CLK or SCL). The lines are externally pulled to a bus voltage when they are idle. When connecting to the lines, a master device generates the SCL signal and device address and arranges the communication sequence. This is based on the I[2] C operation principles. This product is a PMBus[TM] slave which supports both the standard mode (100kHz) and fast modes (400kHz). The PMBus[TM] interface adds flexibility to the power supply solution. 

## **Multi Address** 

To support multiple devices used on the same PMBus[TM] , use the ADDR pin to program the different address for each device. 

To determine by external resistor, connect a resistor between ADDR pin and AGND to set the ADDR voltage. The internal ADC converts the pin voltage to set the PMBus[TM] address. Maximum 16 addresses can be set by ADDR pin. Following table shows the PMBus[TM] address for different resistor values from ADDR pin to AGND. 

**Table 14 . PMBus[TM] Address Setting Resistor** 

|**R ADDR-GND [kohm]**|**ADDRESS**|
|---|---|
|4.99|30h|
|15|31h|
|24.9|32h|
|34.8|33h|
|45.3|34h|
|54.9|35h|
|64.9|36h|
|75|37h|
|84.5|38h|
|95.3|39h|
|105|3Ah|
|115|3Bh|
|124|3Ch|
|133|3Dh|
|147|3Eh|
|154|3Fh|



## **Start and Stop Conditions** 

The start and stop are signaled by the master device which signifies the beginning and the end of the PMBus[TM] transfer. 

The start condition is defined as the SDA signal transitioning from high to low while the SCL is high. The stop condition is defined as the SDA signal transitioning from low to high while the SCL is high as shown in Figure 29. 

The master then generates the SCL clocks and transmits the device address and the read/write direction bit r/w on the SDA line. Data is transferred in 8 bit bytes by SDA line. Each byte of data is to be followed by an acknowledge bit. 

**==> picture [502 x 121] intentionally omitted <==**

**----- Start of picture text -----**<br>
SDA<br>a6-a0 b7-b0 b7-b0<br>SCL<br>  1-7 8 9   1-7 8 9   1-7 8 9<br>! S \ [ NS NS NS NS NS NS NS NS NSE P<br>START ADDRESS R/W ACK DATA ACK DATA ACK STOP<br>CONDITION CONDITION<br>Figure29. Start and Stop Conditions<br>**----- End of picture text -----**<br>


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**MYMGM1R824ELA5RN** Document Category: Datasheet 

## MonoBK™ 24A DC–DC Converter Series 

## **PMBus[TM] Update Sequence** 

This product requires a start condition, a valid PMBus[TM] address, a register address byte, and a data byte for a single data update. 

The product acknowledges the receipt of each byte by pulling the SDA line low during the high period of a single clock pulse. A valid PMBus[TM] address selects the product. 

The product performs an update on the falling edge of the LSB byte. 

## **Protocol Usage** 

All PMBus[TM] transactions on device are done using defined bus protocols. The following protocols are implemented: 

- Send byte with PEC 

- Receive byte with PEC 

- Write byte with PEC 

- Read byte with PEC 

- Write word with PEC 

- Read word with PEC 

- Block read with PEC 

## **PMBus[TM] Bus message format** 

In the tables in following communication pattern, unshaded cells indicate that the bus host is actively driving the bus; shaded cells indicate that the device is driving the bus. 

S = start condition 

Sr = repeated start condition 

P = stop condition 

R = read bit 

W= write bit 

A = acknowledge bit (0) 

A#= acknowledge bit (1) 

“A” represents the ACK (acknowledge) bit. The ACK bit is typically active low (Logic 0) if the transmitted byte is successfully received by a device. However, when the receiving device is the bus master, the acknowledge bit for the last byte read is a logic 1, indicated by A#. 

## **Packet Error Checking (PEC)** 

The device PMBus[TM] interface supports the use of the packet error checking (PEC) byte. The PEC byte is transmitted by the device during a read transaction or sent by the bus host to the device during a write transaction. 

The PEC byte is used by the bus host or the device to detect errors during a bus transaction, depending on whether the transaction is a read or a write. If the host determines that the PEC byte read during a read transaction is incorrect, it can decide to repeat the read if necessary. If the device determines that the PEC byte sent during a write transaction is incorrect, it ignores the command (does not execute it) and sets a status flag. Within a group command, the host can choose to send or not send a PEC byte as part of the message to the device. 

## **PMBus[TM] Alert Response Address (ARA)** 

The PMBus[TM] alert response address (ARA) is a special address that can be used by the bus host to locate any devices that need to talk to it. A host typically uses a hardware interrupt pin to monitor the PMBus[TM] ALERT pins of a number of devices. When a host interruption occurs, the host issues a message on the bus using the PMBus[TM ] receive byte or receive byte with PEC protocol. The special address used by the host is 0x0C. Any devices that have a PMBus[TM] alert signal return their own 7-bit address as the seven MSBs of the data byte. The LSB value is not used and can be either 1 or 0. 

The host reads the device address from the received data byte and proceeds to handle the alert condition. More than one device may have an active PMBus[TM ] alert signal and attempt to communicate with the host. In this case, the device with the lowest address dominates the bus and succeeds in transmitting its address to the host. The device that succeeds disables its PMBus[TM] alert signal. If the host sees that the PMBus[TM] alert signal is still low, it continues to read addresses until all devices that need to talk to it have successfully transmitted their addresses. 

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**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

## MonoBK™ 24A DC–DC Converter Series 

## **Data and Numerical Formats** 

The device uses a direct format internally to represent real-world values such as voltage, current, power and temperature. All numbers with no suffix in this document are decimals unless explicitly designated otherwise. Numbers in binary format are indicated by the prefix “n’b”, where n is the binary count. For example, 5’b01010 indicates a 5-bit binary data, and the data is 01010. The suffix “h” indicates a hexadecimal format, which is generally used for the register address number in this document. The symbol “0x” indicates a hexadecimal format, which is used for the value in the register. For example, 0xA3 is a 1-byte number whose hexadecimal value is A3. 

## **PMBus[TM] Communication Failure** 

A data transmission fault occurs when the data is not properly transferred between the devices. There are several types of the data transmission faults as listed below: 

- Sending too few data 

- Reading too few data 

- Sending too many bytes 

- Reading too many bytes 

- Improperly set read bit in the address byte 

- Unsupported command code 

## **PMBus[TM] Reporting and Status Monitoring** 

The device supports real-time monitoring for some operation parameters and status with PMBus[TM] interface. They are described on each command list. 

## **Communication Pattern** 

|**Communication Pattern**|||||||||
|---|---|---|---|---|---|---|---|---|
|a) Send Byte and Send Byte with PEC|||||||||
|1<br>1<br>1<br>1<br>1<br>7<br>8|||||||||
|S<br>Wr<br>A<br>A<br>P<br>1<br>1<br>1<br>1<br>1<br>1<br>Slave Address<br>Data Byte<br>7<br>8<br>8<br>~~L[TT~~|||||||||
|S<br>Wr<br>A<br>A<br>A<br>P<br>b) Receive Byte and Receive Byte with PEC<br>Slave Address<br>Data Byte<br>PEC<br>~~L[TT~~|||||||||
|1<br>1<br>1<br>1<br>1<br>7<br>8|||||||||
|S<br>Rd<br>A<br>A<br>P<br>1<br>1<br>1<br>1<br>1<br>1<br>Slave Address<br>Data Byte<br>7<br>8<br>8<br>~~a~~<br>~~a~~|||||||||
|S<br>Rd<br>A<br>A<br>A<br>P<br>c) Write Byte and Write Byte with PEC<br>Slave Address<br>Data Byte<br>PEC<br>~~a~~<br>~~BD~~<br>~~0~~|||||||||
|1<br>1<br>1<br>1<br>1<br>1<br>7<br>8<br>8|||||||||
|S<br>Wr<br>A<br>A<br>A<br>P<br>1<br>1<br>1<br>1<br>1<br>Slave Address<br>Command Code<br>7<br>8<br>8<br>Data Byte<br>~~a~~<br>~~SsDD~~<br>~~DD~~||8|1|1|||||
|S<br>Wr<br>A<br>A<br>A<br>A<br>P<br>d) Write Word and Write Word with PEC<br>PEC<br>Slave Address<br>Command Code<br>Data Byte<br>~~[fo~~<br>~~TT~~|||||||||
|1<br>1<br>1<br>1<br>1<br>7<br>8<br>8||8|1|1|||||
|S<br>Wr<br>A<br>A<br>A<br>A<br>P<br>1<br>1<br>1<br>1<br>1<br>1<br>Data Byte High<br>Slave Address<br>Command Code<br>Data Byte Low<br>7<br>8<br>8<br>8<br>~~a~~<br>~~BS sD~~<br>~~DE~~||||||8|1|1|
|S<br>Wr<br>A<br>A<br>A<br>A<br>A<br>P<br>e) Read Byte and Read Byte with PEC<br>Slave Address<br>Command Code<br>Data Byte Low<br>Data Byte High<br>PEC<br>~~a~~<br>~~HF~~<br>~~SF~~<br>~~CG~~|||||||||
|1<br>1<br>1<br>1<br>1<br>1<br>1<br>7<br>7<br>8||8|1|1|||||
|S<br>Wr<br>A<br>A<br>S<br>Rd<br>A<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>Slave Address<br>Data Byte<br>7<br>8<br>Slave Address<br>Command Code<br>7<br>8<br>~~a~~<br>~~sO CG NS~~|||A<br>1|P||8|1|1|
|S<br>Wr<br>A<br>A<br>S<br>Rd<br>A<br>A<br>A<br>P<br>Slave Address<br>Command Code<br>PEC<br>Slave Address<br>Data Byte<br>~~[Jo~~<br>~~TT~~|||||||||



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**MYMGM1R824ELA5RN** Document Category: Datasheet 

## MonoBK™ 24A DC–DC Converter Series 

**==> picture [446 x 270] intentionally omitted <==**

**----- Start of picture text -----**<br>
f) Read Word and Read Word with PEC<br>1 7 1 1 8 1 1 7 1 1 8 1<br>S Slave Address Wr A Command Code A S Slave Address Rd A Data Byte Low A<br>[ [dT 8 1 1<br>es Data Byte High ae A ee P<br>1 7 1 1 8 1 1 7 1 1 8 1<br>[TT S  [dT Slave Address Wr A Command Code8 A1 S 8Slave Address1 Rd1 ET A Data Byte Low A<br>a Data Byte High ee A PEC ee ee A P<br>g) Block Read with PEC<br>1 7 1 1 8 1 1 7 1 1 8 1<br>S Slave Address Wr A Command Code A Sr Slave Address Rd A Byte Count =N A ・・・<br>[ [dT 8 1 8 1 8 1 1<br>a Data Byte 1 A A Data Byte 2 ee A ・・・ Data Byte N A P<br>1 7 1 1 8 1 1 7 1 1 8 1<br>S Slave Address Wr A Command Code A Sr Slave Address Rd A Byte Count =N A ・・・<br>[ [dT 8 1 8 1 8 1 8 1 1<br>LS Data Byte 1 A A Data Byte 2 Dey A ・・・ a Data Byte N A PEC A P<br>**----- End of picture text -----**<br>


## **PMBus[TM] Register Map** 

**Table 15. PMbus[TM] Command List** 

**==> picture [446 x 344] intentionally omitted <==**

**----- Start of picture text -----**<br>
CODE  COMMAND NAME  TYPE  | DEFAULT VALUE (HEX)  DEFAULT VALUE (Actual)  |<br>a 01h  OPERATION  Ge r/w w/PEC  GC 0x80  -<br>Ge 02h  ON_OFF_CONFIG  r/w w/PEC  GC 0x16  -<br>Ge 03h  CLEAR_FAULTS  Send byte w/PEC  GO - -<br>Ge 10h  WRITE_PROTECT  r/w w/PEC  GC 0x00  -<br>Ge 19h  CAPABILITY  r w/PEC  GO 0xB0  -<br>Ge 20h  VOUT_MODE  r w/PEC  GC 0x40  -<br>Ge 21h  VOUT_COMMAND  r/w w/PEC  GO 0x015E  0.7V<br>a 25h  VOUT_MARGIN_HIGH  Ge r/w w/PEC  GO 0x0181  0.77V<br>DG 26h  VOUT_MARGIN_LOW  r/w w/PEC  GO 0x013B  0.63V<br>a 29h  VOUT_SCALE_LOOP  Ge r/w w/PEC  GO 0x0359  0.857<br>DG 35h  VIN_ON  r/w w/PEC  GO 0x001D  7.25V<br>Ge 36h  VIN_OFF  r/w w/PEC  GC 0x001B  6.75V<br>Ge 4Ah  IOUT_OC_WARN_LIMIT  r/w w/PEC  GO 0x006C  26.136A<br>Ge 51h  OT_WARN_LIMIT  r/w w/PEC  GC 0x0091  145degC<br>Ge 57h  VIN_OV_WARN_LIMIT  r/w w/PEC  GC 0x0020  16V<br>GOO 58h  VIN_UV_WARN_LIMIT  r/w w/PEC  0x001C  7V<br>Ge 60h  TON_DELAY  r/w w/PEC  GC 0x0000  0ms<br>GOO 61h  TON_RISE  r/w w/PEC  0x0001  2ms<br>Ge 78h  STATUS_BYTE  r w/PEC  GC - -<br>GOO 79h  STATUS_WORD  r w/PEC  - -<br>Ge 7Ah  STATUS_VOUT  r w/PEC  GC - -<br>GOO 7Bh  STATUS_IOUT  r w/PEC  - -<br>Ge 7Ch  STATUS_INPUT  r w/PEC  GC - -<br>GOO 7Dh  STATUS_TEMPERATURE  r w/PEC  - -<br>Ge 7Eh  STATUS_CML  r w/PEC  GC - -<br>GOO 88h  READ_VIN  r w/PEC  - -<br>Ge 8Bh  READ_VOUT  r w/PEC  GC - -<br>Ge 8Ch  READ_IOUT  r w/PEC  GC - -<br>Ge 8Dh  READ_TEMPERATURE_1  r w/PEC  GO - -<br>Ge 98h  PMBus [TM] _REVISION  r/w w/PEC  GC - -<br>Ge D1h  MFR_CTRL_VOUT  r/w w/PEC  GO 0x00  -<br>a D3h  MFR_ADDR_PMBus Ge [TM] r/w w/PEC  GO 0x00  -<br>**----- End of picture text -----**<br>


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**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

## MonoBK™ 24A DC–DC Converter Series 

## **OPERATION (01h)** 

The OPERATION command turns the converter output on or off in conjunction with the input from the CTRL pin. OPERATION is also used to set the output voltage to the upper or lower margin voltages. The unit remains in the commanded operating mode until a subsequent OPERATION command or a change in the state of the CTRL pin instructs the converter to change to another mode. This OPERATION command is also used to re-enable the converter after a fault-triggered shutdown. Writing an off command followed by an on command clears all faults. Writing only an on command after a fault-triggered shutdown will not clear the fault registers. 

## **Table 16. OPERATION Command** 

||**Table 16. OPERATION Command**|**Table 16. OPERATION Command**|**Table 16. OPERATION Command**|**Table 16. OPERATION Command**|**Table 16. OPERATION Command**|**Table 16. OPERATION Command**|**Table 16. OPERATION Command**|**Table 16. OPERATION Command**|
|---|---|---|---|---|---|---|---|---|
|Command|OPERATION||||||||
|Format|Unsigned binary||||||||
|Bit|7|6|5|4|3|2|1|0-|
|Access|r/w|r/w|r/w|r/w|r/w|r/w|r|r|
|Function|-|-|-|-|-|-|x|x|
|Default Value|1|0|0|0|0|0|x|x|



## **Table 17.  The Details of Each Bit of the Command 01h.** 

|**Bit[7:6]**<br>~~a~~|**Bit[5:4]**<br>xx<br>~~GG~~|**Bit[3:2]**<br>xx<br>~~GG~~|**Bit[1:0]**<br>xx<br>~~GG~~|**ON/OFF**<br>Immediate Off<br>~~GG~~|**MARGIN STATE**<br>N/A<br>~~GG~~|**01h**<br>0x00<br>~~GG~~|
|---|---|---|---|---|---|---|
|00<br>~~a~~|||||||
|01<br>~~a ~~<br>~~CG~~|xx<br> ~~GG~~<br>~~CG~~|xx<br>~~GG~~<br>~~CG~~|xx<br>~~GG~~<br>~~CG ~~|Immediate Off<br>~~GG~~<br> ~~OG~~|N/A<br>~~GG~~<br>~~OG~~|0x60<br>~~GG~~|
|10<br>~~eG~~|00<br>~~eG~~|xx<br>~~eG~~|xx<br>~~eG~~|On<br>~~GG~~|Off<br>~~GG~~|0x80|
|10<br>~~eG~~<br>~~CG~~|01<br>~~eG~~<br>~~CG~~|01<br>~~eG~~<br>~~CG~~|xx<br>~~eG ~~<br>~~CG ~~|On<br> ~~GG~~<br> ~~OG~~|Margin low (ignore fault)<br>~~GG~~<br>~~OG~~|0x94|
|10<br>~~eG~~|01<br>~~eG~~|10<br>~~eG~~|xx<br>~~eG~~|On<br>~~GG~~|Margin low (act on fault)<br>~~GG~~|0x98|
|10<br>~~eG~~<br>~~eG~~|10<br>~~eG~~<br>~~eG~~|01<br>~~eG~~<br>~~eG~~|xx<br>~~eG ~~<br>~~eG ~~|On<br> ~~GG~~<br> ~~GG~~|Margin high (ignore fault)<br>~~GG~~<br>~~GG~~|0xA4|
|10<br>~~Ge~~|10<br>~~Ge~~|10<br>~~Ge~~|xx<br>~~Ge ~~|On<br> ~~GG~~|Margin high (act on fault)<br>~~GG~~|0xA8|



## **ON_OFF_CONFIG (02h)** 

The ON_OFF_CONFIG command configures the combination of the CTRL input and the PMBus[TM ] commands to turn the converter on and off. This includes how the converter responds when an input voltage is applied. 

**Table 18. ON_OFF_CONFIG** 

||**Table 18. ON_OFF_CONFIG**|**Table 18. ON_OFF_CONFIG**|**Table 18. ON_OFF_CONFIG**|**Table 18. ON_OFF_CONFIG**|**Table 18. ON_OFF_CONFIG**|**Table 18. ON_OFF_CONFIG**|**Table 18. ON_OFF_CONFIG**|**Table 18. ON_OFF_CONFIG**|
|---|---|---|---|---|---|---|---|---|
|Command|ON_OFF_CONFIG||||||||
|Format|Unsigned binary||||||||
|Bit|7|6|5|4|3|2|1|0-|
|Access|r|r|r|r/w|r/w|r/w|r/w|r|
|Function|x|x|x|on|op|ctrl|x|delay|
|Default Value|0|0|0|1|0|1|1|0|



## **on** 

This on bit sets the default to either operate whenever the input voltage is present or for the on/off to be controlled by CTRL and PMBus[TM] commands. 

## **Table 19. on Bit** 

|**Bit[4] VALUE **|**MEANING**<br>Converter powers up whenever the input voltage is present regardless of state of the CTRL pin|
|---|---|
|0||
|1|Converter does not power up until commanded by the CTRL pin and OPERATION command (as programmed in Bits[3:0]|



## **op** 

This op bit controls how the converter responds to the OPERATION commends. 

## **Table 20. op Bit** 

|**Bit[3] VALUE**|**MEANING**|
|---|---|
|0|Converter ignores the“on”bitinthe OPERATIONcommandfrom PMBusTM|
|1|Converter responds the“on”bitinthe OPERATIONcommandfrom PMBusTM|



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**MYMGM1R824ELA5RN** Document Category: Datasheet 

## MonoBK™ 24A DC–DC Converter Series 

## **crtl** 

This ctrl bit controls how the converter responds to the CTRL pin. 

## **Table 21. crtl Bit** 

|**Bit[2] VALUE **|**MEANING**<br>Converter ignores the CTRLpin(on/offcontrolled only by the OPERATIONcommand)|
|---|---|
|0||
|1|Converter requires the CTRL pin to be asserted to power up.<br>Depending on Bit[3] op bit, the OPERATIONcommandmay also berequired toinstruct the converterto powerup.|



## **delay** 

This delay bit sets the turn-off action when the converter is commanded off through the PMBus[TM ] . This bit is read only and cannot be modified by the end user. 

## **Table 22. delay Bit** 

|**Bit[0] VALUE **||**MEANING**|
|---|---|---|
|0|TOFF_DELAY,TOFF_FALL||



## **CLEAR_FAULTS (03h)** 

The CLEAR_FAULTS command is used to reset all stored warning and fault flags. If a fault or warning condition still remains when the CLEAR_FAULTS command is issued, the ALT# signal may not be cleared or is reasserted almost immediately. Issuing a CLEAR_FAULTS command will not cause the converter to restart in the event of a fault turn-off. The converter restart must be done by issuing an OPERATION command after the fault condition is cleared. This command uses the PMBus[TM] to send the byte protocol. 

## **WRITE_PROTECT (10h)** 

The WRITE_PROTECT command is used to control writes to the converter. This command provides protection against accidental changes. This command is not intended to provide protection against deliberate or malicious changes to the converter’s configuration or operation. 

All the supported commands may have their parameters read, regardless of the WRITE_PROTECT settings. 

**Table 23. WRITE_PROTECT Command** 

|**Bit[7:0] VALUE**|**Bit[7:0] VALUE**|**Bit[7:0] VALUE**|**Bit[7:0] VALUE**|**Bit[7:0] VALUE**|**Bit[7:0] VALUE**|**Bit[7:0] VALUE**|**Bit[7:0] VALUE**|**MEANING**|
|---|---|---|---|---|---|---|---|---|
|0|0|0|0|0|0|0|0En|Enablewrites to allcommands.|
|0|0|1|0|0|0|0|0|Disable all writes except to the WRITE_PROTECT, OPERATION, PAGE,<br>ON_OFF_CONFIG andVOUT_COMMANDcommands.|
|0|1|0|0|0|0|0|0Di|Disable all writes except to theWRITE_PROTECT, OPERATIONandPAGEcommands.|
|1|0|0|0|0|0|0|0Di|Disable all writes except to theWRITE_PROTECTcommand.|



## **CAPABILITY (19h)** 

The CAPABILITY command returns information about the PMBus[TM] functions supported by this product. This command is read with the PMBus[TM] read byte protocol. 

**Table 24. CAPABILITY Command** 

|Command|Command|||||CAPABILITY|CAPABILITY|CAPABILITY|||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Format|||||Unsigned binary||||||||
|Bit|Bit||7|6|5||4|3|2||1|0-|
|Access|||r|r|r||r|r|r||r|r|
|Function|||PEC|MAX bus speed|||Alert|x|x||x|x|
|Default Value|||1|0|1||1|0|0||0|0|
|**Table 25. The Details of Each Bit of the Command 10h.**|||**Table 25. The Details of Each Bit of the Command 10h.**|||**Table 25. The Details of Each Bit of the Command 10h.**|**Table 25. The Details of Each Bit of the Command 10h.**||||**Table 25. The Details of Each Bit of the Command 10h.**|**Table 25. The Details of Each Bit of the Command 10h.**|
|**Bit[6:5] VALUE**|||||||**MEANING**||||||
|0|0||Maximumsupported bus speedis100kHz.||||||||||
|0|1||Maximumsupported bus speedis400kHz.||||||||||
|1|1||Reserved||||||||||
|1|0||Not supported||||||||||



## **VOUT_MODE (20h)** 

The VOUT_MODE command is used to command and read the output voltage. The three most significant bits are used to determine the data format (only direct format is supported in this product), and the rest of five bits represent the exponent used in the output voltage Read/Write commands. The default value of 20h is 0x40. 

**http://www.murata.com/products/power** 

Copyright ©2023 Murata Manufacturing Co., Ltd. All rights reserved. Specifications are subject to change without notice. 

Document Number: D90DH - 00218 / Export Control Code : X0863 MYMGM1R824ELA5RN A02(Jul-2023) Page 22 of 41 

Document Category: Datasheet 

## **MYMGM1R824ELA5RN** 

## MonoBK™ 24A DC–DC Converter Series 

## **VOUT_COMMAND (21h)** 

The VOUT_COMMAND sets the output voltage to read output voltage correctly. The VOUT_COMMAND and VOUT_SCALE_LOOP together determine the feedback reference voltage: VOUT_COMMAND x VOUT_SCALE_LOOP. In the section of “Output Voltage Setting” on Table13, it shows the details about how to set this command. 

The value is unsigned and 1LSB = 2mV. The default value of 21h is 0x015E, which is 0.7V. 

||**Table 26. VOUT_COMMAND**|**Table 26. VOUT_COMMAND**|**Table 26. VOUT_COMMAND**|**Table 26. VOUT_COMMAND**|**Table 26. VOUT_COMMAND**|**Table 26. VOUT_COMMAND**|**Table 26. VOUT_COMMAND**|**Table 26. VOUT_COMMAND**|**Table 26. VOUT_COMMAND**|**Table 26. VOUT_COMMAND**|**Table 26. VOUT_COMMAND**|**Table 26. VOUT_COMMAND**|**Table 26. VOUT_COMMAND**|**Table 26. VOUT_COMMAND**|**Table 26. VOUT_COMMAND**|**Table 26. VOUT_COMMAND**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Command<br>~~Pf~~|VOUT_COMMAND<br>~~Pf~~||||||||||||||||
|Format<br>~~a~~<br>~~po~~|Direct||||||||||||||||
|Bit<br>~~a~~<br>~~po~~<br>~~po~~|15|14|13|12|11|10|9|8|7|6|5|4|3|2|1|0|
|Access<br>~~po~~<br>~~po~~|r|r|r|r|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|
|Function<br>~~po~~<br>~~a~~|x||||2mV/LSB||||||||||||
|DefaultValue<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|1<br>~~po~~|0<br>~~po~~|1<br>~~po~~|0<br>~~po~~|1<br>~~po~~|1<br>~~po~~|1<br>~~po~~|1<br>~~po~~|0<br>~~po~~|



**VOUT_MARGIN_HIGH (25h)** 

|~~ee~~|**Table 27. VOUT_MARGIN_HIGH**|**Table 27. VOUT_MARGIN_HIGH**|**Table 27. VOUT_MARGIN_HIGH**|**Table 27. VOUT_MARGIN_HIGH**|**Table 27. VOUT_MARGIN_HIGH**|**Table 27. VOUT_MARGIN_HIGH**|**Table 27. VOUT_MARGIN_HIGH**|**Table 27. VOUT_MARGIN_HIGH**|**Table 27. VOUT_MARGIN_HIGH**|**Table 27. VOUT_MARGIN_HIGH**|**Table 27. VOUT_MARGIN_HIGH**|**Table 27. VOUT_MARGIN_HIGH**|**Table 27. VOUT_MARGIN_HIGH**|**Table 27. VOUT_MARGIN_HIGH**|**Table 27. VOUT_MARGIN_HIGH**|**Table 27. VOUT_MARGIN_HIGH**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Command<br>~~ee~~<br>~~es~~|VOUT_MARGIN_HIGH||||||||||||||||
|Format<br>~~ee~~<br>~~es~~<br>~~po~~|Direct<br>~~po~~||||||||||||||||
|Bit<br>~~es~~<br>~~po~~<br>~~po~~|15<br>~~po~~|14|13|12|11|10|9|8|7|6|5|4|3|2|1|0|
|Access<br>~~po~~<br>~~po~~<br>~~eG~~|r<br>~~po~~<br>~~eG~~|r<br>~~eG~~|r|r|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|
|Function<br>~~po~~<br>~~eG~~<br>~~po~~|x<br>~~eG~~||||2mV/LSB||||||||||||
|Default Value<br>~~eG~~<br>~~po~~|0<br>~~eG~~|0<br>~~eG~~|0|0|0|0|0|1|1|0|0|0|0|0|0|1|



The value is unsigned and 1LSB = 2mV. The default value is 0.77V. So the default value of 25h is 0x0181. 

## **VOUT_MARGIN_LOW (26h)** 

**Table 28. VOUT_MARGIN_LOW** 

|~~es~~|**Table 28. VOUT_MARGIN_LOW**|**Table 28. VOUT_MARGIN_LOW**|**Table 28. VOUT_MARGIN_LOW**|**Table 28. VOUT_MARGIN_LOW**|**Table 28. VOUT_MARGIN_LOW**|**Table 28. VOUT_MARGIN_LOW**|**Table 28. VOUT_MARGIN_LOW**|**Table 28. VOUT_MARGIN_LOW**|**Table 28. VOUT_MARGIN_LOW**|**Table 28. VOUT_MARGIN_LOW**|**Table 28. VOUT_MARGIN_LOW**|**Table 28. VOUT_MARGIN_LOW**|**Table 28. VOUT_MARGIN_LOW**|**Table 28. VOUT_MARGIN_LOW**|**Table 28. VOUT_MARGIN_LOW**|**Table 28. VOUT_MARGIN_LOW**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Command<br>~~es~~<br>~~es~~|VOUT_MARGIN_LOW||||||||||||||||
|Format<br>~~es~~<br>~~es~~<br>~~po~~|Direct||||||||||||||||
|Bit<br>~~es~~<br>~~po~~<br>~~po~~|15|14|13|12|11|10|9|8|7|6|5|4|3|2|1|0|
|Access<br>~~po~~<br>~~po~~<br>~~eG~~|r<br>~~eG~~|r<br>~~eG~~|r|r|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|
|Function<br>~~po~~<br>~~eG~~<br>~~po~~|x<br>~~eG~~||||2mV/LSB||||||||||||
|DefaultValue<br>~~eG~~<br>~~po~~|0<br>~~eG~~|0<br>~~eG~~|0|0|0|0|0|1|0|0|1|1|1|0|1|1|



The value is unsigned and 1LSB = 2mV. The default value is 0.63V. So the default value of 26h is 0x013B. 

## **VOUT_SCALE_LOOP (29h)** 

VOUT_SCALE_LOOP sets the feedback resistor divider ratio and is equal to VFB/VOUT. Regardless of whether an external or internal feedback resistor divider is used, VOUT_SCALE_LOOP should match the actual feedback resistor divider used. 

## **Table 29. VOUT_SCALE_LOOP** 

||**Table 29. VOUT_SCALE_LOOP**|**Table 29. VOUT_SCALE_LOOP**|**Table 29. VOUT_SCALE_LOOP**|**Table 29. VOUT_SCALE_LOOP**|**Table 29. VOUT_SCALE_LOOP**|**Table 29. VOUT_SCALE_LOOP**|**Table 29. VOUT_SCALE_LOOP**|**Table 29. VOUT_SCALE_LOOP**|**Table 29. VOUT_SCALE_LOOP**|**Table 29. VOUT_SCALE_LOOP**|**Table 29. VOUT_SCALE_LOOP**|**Table 29. VOUT_SCALE_LOOP**|**Table 29. VOUT_SCALE_LOOP**|**Table 29. VOUT_SCALE_LOOP**|**Table 29. VOUT_SCALE_LOOP**|**Table 29. VOUT_SCALE_LOOP**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Command<br>~~a~~<br>~~Rs~~|VOUT_SCALE_LOOP||||||||||||||||
|Format<br>~~Rs~~<br>~~po~~|Direct||||||||||||||||
|Bit<br>~~Rs~~<br>~~po~~<br>~~po~~|15|14|13|12|11|10|9|8|7|6|5|4|3|2|1|0|
|Access<br>~~po~~<br>~~po~~<br>~~eG~~|r<br>~~eG~~|r<br>~~eG~~|r|r|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|
|Function<br>~~po~~<br>~~eG~~<br>~~po~~|x<br>~~eG~~||||0.001/LSB||||||||||||
|Default Value<br>~~eG~~<br>~~po~~|0<br>~~eG~~|0<br>~~eG~~|0|0|0|0|1|1|0|1|0|1|1|0|0|1|



The value is unsigned and 1LSB =0.001. The default value is 0.857. So the default value of 29h is 0x0359. 

**http://www.murata.com/products/power** 

Copyright ©2023 Murata Manufacturing Co., Ltd. All rights reserved. Specifications are subject to change without notice. 

Document Number: D90DH - 00218 / Export Control Code : X0863 MYMGM1R824ELA5RN A02(Jul-2023) Page 23 of 41 

**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

## MonoBK™ 24A DC–DC Converter Series 

## **VIN_ON (35h)** 

The VIN_ON command sets the value of the input voltage, (in V), at which the converter should start to run if all other required power-up conditions are met. The VIN_ON value can be set between 7.25V and 15V with 0.25V increment. The VIN_ON value should be always set higher than VIN_OFF value with enough margin, so that there will be no bouncing between VIN_ON and VIN_OFF during power conversion. 

## **Table 30. VIN ON** 

|~~ee~~|**Table 30. VIN ON**|**Table 30. VIN ON**|**Table 30. VIN ON**|**Table 30. VIN ON**|**Table 30. VIN ON**|**Table 30. VIN ON**|**Table 30. VIN ON**|**Table 30. VIN ON**|**Table 30. VIN ON**|**Table 30. VIN ON**|**Table 30. VIN ON**|**Table 30. VIN ON**|**Table 30. VIN ON**|**Table 30. VIN ON**|**Table 30. VIN ON**|**Table 30. VIN ON**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Command<br>~~ee~~<br>~~es~~|VIN_ON||||||||||||||||
|Format<br>~~ee~~<br>~~es~~<br>~~**p**o~~|Direct||||||||||||||||
|Bit<br>~~es~~<br>~~**p**o~~|15|14|13|12|11|10|9|8|7|6|5|4|3|2|1|0|
|Access<br>~~**p**o~~|r|r|r|r|r/w|r/w|r/w<br>~~o~~|r/w<br>~~o~~|r/w<br>~~o~~|r/w<br>~~o~~|r/w<br>~~o~~|r/w<br>~~o~~|r/w<br>~~o~~|r/w<br>~~o~~|r/w<br>~~o~~|r/w<br>~~o~~|
|Function<br>~~Ce~~|x<br>~~Ce~~||||250mV/LSB<br>~~o~~||||||||||||
|Default Value<br>~~Ce~~<br>~~po~~|0<br>~~Ce~~<br>~~po~~|0<br>~~Ce~~<br>~~po~~|0<br>~~Ce~~<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|1<br>~~po~~|1<br>~~po~~|1<br>~~po~~|0<br>~~po~~|1<br>~~po~~|



The value is unsigned and 1LSB=250mV. The default value is 7.25V. So the default value of 35h is 0x001D. 

## **VIN_OFF (36h)** 

The VIN_OFF command sets the value of the input voltage, (in V), at which the converter, once operation has started, should stop power conversion. The VIN_OFF value can be set between 6.75V and 15V with 0.25V increment. The VIN_OFF value should be always set lower than VIN_ON value with enough margin, so that there is no bouncing between VIN_OFF and VIN_ON during power conversion. 

||**Table 31. VIN OFF**|**Table 31. VIN OFF**|**Table 31. VIN OFF**|**Table 31. VIN OFF**|**Table 31. VIN OFF**|**Table 31. VIN OFF**|**Table 31. VIN OFF**|**Table 31. VIN OFF**|**Table 31. VIN OFF**|**Table 31. VIN OFF**|**Table 31. VIN OFF**|**Table 31. VIN OFF**|**Table 31. VIN OFF**|**Table 31. VIN OFF**|**Table 31. VIN OFF**|**Table 31. VIN OFF**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Command<br>~~ee~~<br>~~es~~|VIN_OFF<br>~~ee~~||||||||||||||||
|Format<br>~~ee~~<br>~~es~~<br>~~po~~|Direct<br>~~ee~~||||||||||||||||
|Bit<br>~~es~~<br>~~po~~<br>~~po~~|15|14|13|12|11|10|9|8|7|6|5|4|3|2|1|0|
|Access<br>~~po~~<br>~~po~~<br>~~eG~~|r<br>~~eG~~|r<br>~~eG~~|r|r|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|
|Function<br>~~po~~<br>~~eG~~<br>~~po~~|x<br>~~eG~~||||250mV/LSB||||||||||||
|Default Value<br>~~eG~~<br>~~po~~|0<br>~~eG~~|0<br>~~eG~~|0|0|0|0|0|0|0|0|0|1|1|0|1|1|



The value is unsigned and 1 LSB=250mV. The default value is 6.75V. So the default value of 36h is 0x001B. 

## **IOUT_OC_WARN_LIMIT (4Ah)** 

The IOUT_OC_WARN_LIMIT command is used to configure or read the threshold for the over-current warning detection. If the sensed current exceeds this value, the OC warning flags are set in the STATUS BYTE (78h), STATUS_WORD (79h) respectively, and the ALT# signal is asserted. 

||**Table 32. IOUT_OC_WARN_LIMIT**|**Table 32. IOUT_OC_WARN_LIMIT**|**Table 32. IOUT_OC_WARN_LIMIT**|**Table 32. IOUT_OC_WARN_LIMIT**|**Table 32. IOUT_OC_WARN_LIMIT**|**Table 32. IOUT_OC_WARN_LIMIT**|**Table 32. IOUT_OC_WARN_LIMIT**|**Table 32. IOUT_OC_WARN_LIMIT**|**Table 32. IOUT_OC_WARN_LIMIT**|**Table 32. IOUT_OC_WARN_LIMIT**|**Table 32. IOUT_OC_WARN_LIMIT**|**Table 32. IOUT_OC_WARN_LIMIT**|**Table 32. IOUT_OC_WARN_LIMIT**|**Table 32. IOUT_OC_WARN_LIMIT**|**Table 32. IOUT_OC_WARN_LIMIT**|**Table 32. IOUT_OC_WARN_LIMIT**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Command<br>~~ee~~|IOUT_OC_WARN_LIMIT<br>~~ee~~||||||||||||||||
|Format<br>~~a~~<br>~~**p**o~~|Direct||||||||||||||||
|Bit<br>~~**p**o~~|15|14|13|12|11|10|9|8|7|6|5|4|3|2|1|0|
|Access<br>~~**p**o~~<br>~~es~~|r|r|r|r|r/w|r/w|r/w<br>~~o~~|r/w<br>~~o~~|r/w<br>~~o~~|r/w<br>~~o~~|r/w<br>~~o~~|r/w<br>~~o~~|r/w<br>~~o~~|r/w<br>~~o~~|r/w<br>~~o~~|r/w<br>~~o~~|
|Function<br>~~es~~|x||||242mA/LSB||||||||||||
|Default Value<br>~~es~~<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|0<br>~~po~~|1<br>~~po~~|1<br>~~po~~|0<br>~~po~~|1<br>~~po~~|1<br>~~po~~|0<br>~~po~~|0<br>~~po~~|



The value is unsigned and 1LSB=242mA. The default value is 006Ch. The corresponding value of the total output current is about 26A. 

## **OT_WARN_LIMIT (51h)** 

The OT_WARN_LIMIT is used to configure or read the threshold for the over-temperature warning detection. If the sensed temperature exceeds this value, an over temperature warning is triggered, the OT warning flags are set in the STATUS BYTE(78h) and STATUS_WORD(79h) respectively, and the ALT# signal is asserted. The minimum temperature warning detection time should be smaller than 20ms. 

**Table 33. OT_WARN_LIMIT** 

|~~es~~|**Table 33. OT_WARN_LIMIT**|**Table 33. OT_WARN_LIMIT**|**Table 33. OT_WARN_LIMIT**|**Table 33. OT_WARN_LIMIT**|**Table 33. OT_WARN_LIMIT**|**Table 33. OT_WARN_LIMIT**|**Table 33. OT_WARN_LIMIT**|**Table 33. OT_WARN_LIMIT**|**Table 33. OT_WARN_LIMIT**|**Table 33. OT_WARN_LIMIT**|**Table 33. OT_WARN_LIMIT**|**Table 33. OT_WARN_LIMIT**|**Table 33. OT_WARN_LIMIT**|**Table 33. OT_WARN_LIMIT**|**Table 33. OT_WARN_LIMIT**|**Table 33. OT_WARN_LIMIT**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Command<br>~~es~~<br>~~es~~|IOUT_OC_WARN_LIMIT||||||||||||||||
|Format<br>~~es~~<br>~~es~~<br>~~po~~|Direct<br>~~po~~||||||||||||||||
|Bit<br>~~es~~<br>~~po~~<br>~~po~~|15<br>~~po~~<br>|14<br>|13<br>|12<br>|11<br>|10<br>|9<br>|8<br>|7<br>|6<br>|5<br>|4<br>|3<br>|2<br>|1<br>|0<br>|
|Access<br>~~po~~<br>~~po~~|r<br>~~po~~<br>|r<br>|r<br>|r<br>|r<br>|r<br>|r<br>|r<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|
|Function<br>~~poGC~~<br>~~po~~|x<br>~~GC~~||||||||1degC/LSB<br>~~GC~~||||||||
|Default Value<br>~~po~~|0|0|0|0|0|0|0|0|1|0|0|1|0|0|0|1|



The value is unsigned and 1LSB=1 degC. The default value is 0x0091. The corresponding value is 145degC. The OT_WARN_LIMIT setting value should be lower than 155degC. 

**http://www.murata.com/products/power** 

Copyright ©2023 Murata Manufacturing Co., Ltd. All rights reserved. Specifications are subject to change without notice. 

Document Number: D90DH - 00218 / Export Control Code : X0863 MYMGM1R824ELA5RN A02(Jul-2023) Page 24 of 41 

**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

MonoBK™ 24A DC–DC Converter Series 

## **VIN_OV_WARN_LIMIT (57h)** 

The VIN_OV_WARN_LIMIT command is used to configure or read the threshold for the input-over-voltage warning detection. If the measured value of VIN rises above the value in this register, VIN OV warning flags are set in the respective registers, and the ALT# signal is asserted. 

**Table 34. VIN_OV_WARN_LIMIT** 

||**Table 34. VIN_OV_WARN_LIMIT**|**Table 34. VIN_OV_WARN_LIMIT**|**Table 34. VIN_OV_WARN_LIMIT**|**Table 34. VIN_OV_WARN_LIMIT**|**Table 34. VIN_OV_WARN_LIMIT**|**Table 34. VIN_OV_WARN_LIMIT**|**Table 34. VIN_OV_WARN_LIMIT**|**Table 34. VIN_OV_WARN_LIMIT**|**Table 34. VIN_OV_WARN_LIMIT**|**Table 34. VIN_OV_WARN_LIMIT**|**Table 34. VIN_OV_WARN_LIMIT**|**Table 34. VIN_OV_WARN_LIMIT**|**Table 34. VIN_OV_WARN_LIMIT**|**Table 34. VIN_OV_WARN_LIMIT**|**Table 34. VIN_OV_WARN_LIMIT**|**Table 34. VIN_OV_WARN_LIMIT**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Command<br>~~a~~|VIN_OV_WARN_LIMIT||||||||||||||||
|Format<br>~~a~~<br>~~po~~|Direct||||||||||||||||
|Bit<br>~~a~~<br>~~po~~<br>~~po~~|15<br>~~po~~|14<br>~~po~~|13|12|11|10|9|8|7|6|5|4|3|2|1|0|
|Access<br>~~po~~<br>~~po~~|r<br>~~po~~|r<br>~~po~~|r|r|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|
|Function<br>~~po~~<br>~~a  D~~<br>~~Pp~~|x<br>~~po~~<br>~~D~~<br>~~Pp~~||||500mV/LSB<br>~~D~~||||||||||||
|Default Value<br>~~a  D~~<br>~~Pp~~|0<br>~~D~~<br>~~Pp~~|0<br>~~D~~<br>~~Pp~~|0<br>~~D~~|0<br>~~D~~|0<br>~~D~~|0<br>~~D~~|0<br>~~D~~|0<br>~~D~~|0<br>~~D~~|0<br>~~D~~|1<br>~~D~~|0<br>~~D~~|0<br>~~D~~|0<br>~~D~~|0<br>~~D~~|0<br>~~D~~|



The value is unsigned and 1LSB=500mV. The default value is 0x20. The corresponding value is 16V. The VIN_OV_WARN_LIMIT setting value should not be higher than 16V. 

## **VIN_UV_WARN_LIMIT (58h)** 

The VIN_UV_WARN_LIMIT command is used to configure or read the threshold for the input-under-voltage warning detection. If the measured value of VIN falls below the value in this register, VIN UV warning flags are set in the respective registers, and the ALT# signal is asserted. 

## **Table 35. VIN_UV_WARN_LIMIT** 

||**Table 35. VIN_UV_WARN_LIMIT**|**Table 35. VIN_UV_WARN_LIMIT**|**Table 35. VIN_UV_WARN_LIMIT**|**Table 35. VIN_UV_WARN_LIMIT**|**Table 35. VIN_UV_WARN_LIMIT**|**Table 35. VIN_UV_WARN_LIMIT**|**Table 35. VIN_UV_WARN_LIMIT**|**Table 35. VIN_UV_WARN_LIMIT**|**Table 35. VIN_UV_WARN_LIMIT**|**Table 35. VIN_UV_WARN_LIMIT**|**Table 35. VIN_UV_WARN_LIMIT**|**Table 35. VIN_UV_WARN_LIMIT**|**Table 35. VIN_UV_WARN_LIMIT**|**Table 35. VIN_UV_WARN_LIMIT**|**Table 35. VIN_UV_WARN_LIMIT**|**Table 35. VIN_UV_WARN_LIMIT**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Command<br>~~pf~~|VIN_UV_WARN_LIMIT<br>~~pf~~||||||||||||||||
|Format<br>~~a~~<br>~~po~~|Direct<br>~~po~~||||||||||||||||
|Bit<br>~~a~~<br>~~po~~<br>~~pO~~|15<br>~~po~~<br>|14<br>~~po~~<br>|13<br>~~po~~<br>|12<br>|11<br>|10<br>|9<br>|8<br>|7<br>|6<br>|5<br>|4<br>|3<br>|2<br>|1<br>|0<br>|
|Access<br>~~po~~<br>~~pO~~|r<br>~~po~~<br>|r<br>~~po~~<br>|r<br>~~po~~<br>|r<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|
|Function<br>~~pORG~~<br>~~po~~|x<br>~~RG~~||||250mV/LSB<br>~~RG~~||||||||||||
|Default Value<br>~~po~~|0|0|0|0|0|0|0|0|0|0|0|1|1|1|0|0|



The value is unsigned and 1LSB=250mV. The default value is 0x1C. The corresponding value is 7.0V. The VIN_UV_WARN_LIMIT setting value should be higher than 7.0V. 

## **TON_DELAY (60h)** 

The TON_DELAY command sets the time, (in ms), from when a start condition is received (as programmed by the ON_OFF_CONFIG command) until the output voltage starts to rise. 

**Table 36. TON_DELAY** 

||**Table 36. TON_DELAY**|**Table 36. TON_DELAY**|**Table 36. TON_DELAY**|**Table 36. TON_DELAY**|**Table 36. TON_DELAY**|**Table 36. TON_DELAY**|**Table 36. TON_DELAY**|**Table 36. TON_DELAY**|**Table 36. TON_DELAY**|**Table 36. TON_DELAY**|**Table 36. TON_DELAY**|**Table 36. TON_DELAY**|**Table 36. TON_DELAY**|**Table 36. TON_DELAY**|**Table 36. TON_DELAY**|**Table 36. TON_DELAY**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Command<br>~~a~~|TON_DELAY||||||||||||||||
|Format<br>~~a~~<br>~~pO~~|Direct||||||||||||||||
|Bit<br>~~pO~~<br>~~po~~|15<br>|14<br>|13<br>|12<br>|11<br>|10<br>|9<br>|8<br>|7<br>|6<br>|5<br>|4<br>|3<br>|2<br>|1<br>|0<br>|
|Access<br>~~pO~~<br>~~po~~|r<br>|r<br>|r<br>|r<br>|r<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|r/w<br>|
|Function<br>~~poeG~~<br>~~po~~|x<br>~~eG~~|||||4ms/LSB<br>~~eG~~|||||||||||
|DefaultValue<br>~~po~~|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|



## **TON_RISE (61h)** 

The TON_RISE command sets the soft-start time, (in ms), from when the output starts to rise until the voltage has reached the regulation point. 

**Table 37. TON_RISE** 

||**Table 37. TON_RISE**|**Table 37. TON_RISE**|**Table 37. TON_RISE**|**Table 37. TON_RISE**|**Table 37. TON_RISE**|**Table 37. TON_RISE**|**Table 37. TON_RISE**|**Table 37. TON_RISE**|**Table 37. TON_RISE**|**Table 37. TON_RISE**|**Table 37. TON_RISE**|**Table 37. TON_RISE**|**Table 37. TON_RISE**|**Table 37. TON_RISE**|**Table 37. TON_RISE**|**Table 37. TON_RISE**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Command<br>~~a~~|TON_RISE||||||||||||||||
|Format<br>~~a~~<br>~~pO~~|Direct||||||||||||||||
|Bit<br>~~pO~~|15|14|13|12|11|10|9|8|7|6|5|4|3|2|1|0|
|Access<br>~~pO~~<br>~~|Ge~~|r<br>~~Ge~~|r<br>~~Ge~~|r<br>~~Ge~~|r<br>~~Ge~~|r/w<br>~~Ge~~|r/w<br>~~Ge~~|r/w<br>~~Ge~~|r/w<br>~~Ge~~|r/w<br>~~Ge~~|r/w<br>~~Ge~~|r/w<br>~~Ge~~|r/w<br>~~Ge~~|r/w<br>~~Ge~~|r/w<br>~~Ge~~|r/w<br>~~Ge~~|r/w<br>~~Ge~~|
|Function<br>~~|Ge~~<br>~~Pp~~|x<br>~~Ge~~||||Refer following<br>~~Ge~~||||||||||||
|Default Value<br>~~| Ge~~<br>~~Pp~~|0<br>~~Ge~~|0<br>~~Ge~~|0<br>~~Ge~~|0<br>~~Ge~~|0<br>~~Ge~~|0<br>~~Ge~~|0<br>~~Ge~~|0<br>~~Ge~~|0<br>~~Ge~~|0<br>~~Ge~~|0<br>~~Ge~~|0<br>~~Ge~~|0<br>~~Ge~~|0<br>~~Ge~~|0<br>~~Ge~~|1<br>~~Ge~~|



The only supported values are as follows: 3’b000: 1ms 3’b001: 2ms 3’b010: 4ms 3’b011: 8ms 3’b100 and up: 16ms. The default value is 0x0001, i.e. 2ms for soft-start time. 

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**MYMGM1R824ELA5RN** 

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## MonoBK™ 24A DC–DC Converter Series 

## **STATUS_BYTE (78h)** 

The STATUS_BYTE command returns the value of a number of flags indicating the state of this product. Accesses to this command should use the read byte protocol. To clear bits in this register, the underlying fault should be removed and a CLEAR_FAULTS command issued. 

**Table 38. STATUS_BYTE** 

|**BITS**|**NAME**|**BEHAVIOR**|**DEFAULT**|**DESCRIPTION**|
|---|---|---|---|---|
|[7]|Reserved|-|0|Always read as 0.|
|[6]|OFF|Live|0|0: product enabled.<br>1: product disabled, this can be from: the OC fault, the OT fault, the bad MOSFET<br>fault, the UV/OV fault, or the OPERATION command turning off.|
|[5]|VOUT_OV|-|0|An output over voltage fault has occurred.|
|[4]|IOUT_OC_FAULT|Latched|0|0: no over current fault detected.<br>1: over current fault detected.|
|[3]|VIN_UV|-|0|Not supported, always read as 0.|
|[2]|OT_FAULT_WARN|Live|0|0: no over temperature warning or fault detected.<br>1: over temperature warning or fault detected.|
|[1]|COMM_ERROR|Latched|0|0: no communication error detected.<br>1: communication error detected.|
|[0]|NONE_OF_THE_ABOVE|Live|0|0: no other fault or warning.<br>1: fault or warning not listed in bits [7:1] has occurred.|



## **STATUS_WORD (79h)** 

The STATUS_WORD returns the value of a number of flags indicating the state of this product. To clear bits in this register, the underlying fault should be removed and a CLEAR_FAULTS command issued. 

**Table 39. STATUS_WORD** 

|**BITS**|**NAME**|**BEHAVIOR**|**BEHAVIOR**|**DEFAULT**|**DESCRIPTION**|
|---|---|---|---|---|---|
|[15]|VOUT_STATUS||Live|0|0: no output fault or warning.<br>1: output fault or warning.|
|[14]|IOUT_STATUS||Live|0|0: no IOUTfault.<br>1: IOUTfault.|
|[13]|VIN_STATUS||Live|0|0: no VINfault.<br>1: VINfault, at the period when VINstarts up, the initial flag is 1 before VINpass UVLO<br>threshold. The flag cleared once VINpasses UVLO.|
|[12]|MFR_STATUS||-|0|Always read as 0.|
|[11]|POWER_GOOD#||Live|0|0: power good signal is asserted.<br>1: power good signal is not asserted.|
|[10]|Reserved|||0|Always read as 0.|
|[9]|Reserved|||0|Always read as 0.|
|[8]|UNKNOWN||Latched|0|0: no any other fault has occurred.<br>1: a fault type not specified in bits [15:1] of the STATUS_WORD has been detected.|
|Low byte STATUS_BYTE|Low byte STATUS_BYTE||-|-|STATUS_BYTE is the low byte of the STATUS_WORD.|



## **STATUS_ VOUT (7Ah)** 

The STATUS_VOUT command returns one data byte with contents as follows: 

**Table 40. STATUS_VOUT** 

|**BITS**|**NAME**|**BEHAVIOR**|**DEFAULT**|**DESCRIPTION**|
|---|---|---|---|---|
|[7]|VOUT_OV_FAULT|Live|0|0: no output OV fault.|
|[6]|Reserved|Latched|0|Always read as 0.|
|[5]|Reserved|Latched|0|Always read as 0.|
|[4]|IOUT_UV_FAULT|Live|0|0: no output UV fault.<br>1: output UV fault.|
|[3]|VOUT_MAX_MIN|Live|0|0: no VOUT_MAX, VOUT_MIN warning.<br>1: an attempt has been made to set the output voltage to a value higher than allowed by<br>the VOUT_MAX command or lower than the limit allowed by the VOUT_MIN command.|
|[2]|Reserved|-|0|Always read as 0.|
|[1]|Reserved|-|0|Always read as 0.|
|[0]|UNKNOWN|Latched|0|0: no other fault has occurred.<br>1: a fault type not specified in bits \15:1] of the STATUS_WORD has been detected.|



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**MYMGM1R824ELA5RN** 

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## MonoBK™ 24A DC–DC Converter Series 

## **STATUS_ IOUT (7Bh)** 

**Table 41. STATUS_IOUT** 

||**Table 41. STATUS_IOUT**|**Table 41. STATUS_IOUT**|**Table 41. STATUS_IOUT**|**Table 41. STATUS_IOUT**|**Table 41. STATUS_IOUT**|**Table 41. STATUS_IOUT**|**Table 41. STATUS_IOUT**|**Table 41. STATUS_IOUT**|
|---|---|---|---|---|---|---|---|---|
|Command|STATUS_IOUT||||||||
|Format|Unsigned binary||||||||
|Bit|7|6|5|4|3|2|1|0|
|Access|r|r|r|r|r|r|r|r|
|Function|IOUT_OC|IOUT_OC & VOUT_UV|IOUT_OC_WARNING|x|x|x|x|x|
|DefaultValue|0|0|0||0|0|0|0|



## **STATUS_ INPUT (7Ch)** 

The STATUS_INPUT returns the value of flags indicating input voltage status of this product. To clear bits in this register, the underlying fault or warning should be removed and a CLEAR_FAULTS command issued. 

**Table 42. STATUS_INPUT** 

|**BITS**|**NAME**|**BEHAVIOR **|**DEFAULT**|**DESCRIPTION **|
|---|---|---|---|---|
|[7]|VIN_OV_FAULT|r, Latched|0|0: no over voltage detected on the OV pin.<br>1: over voltage detected on the OV pin.|
|[6]|VIN_OV_WARN|r, Latched|0|0: over voltage condition on VINhas not occurred<br>1: over voltage condition on VINhas occurred|
|[5]|VIN_UV_WARN|r, Latched|0|0:under voltage condition on VINhas not occurred<br>1: under voltage condition on VINhas occurred|
|[4]|VIN_UV_FAULT|r, Latched|0|0: Input voltage is higher than the voltage setting in VIN_ON.<br>1: Input voltage is lower than the voltage setting in VIN_ON.|
|[3:0]|Reserved|-|0|Always read as 0000|



## **STATUS_ TEMPERATURE (7Dh)** 

The STATUS_TEMPERATURE returns the value of flags indicating the VIN overvoltage or under-voltage of this product. To clear bits in this register, the underlying fault should be removed and a CLEAR_FAULTS command issued. 

## **Table 43. STATUS_ TEMPERATURE** 

|**BITS**|**NAME**|**BEHAVIOR **|**DEFAULT**|**DESCRIPTION **|
|---|---|---|---|---|
|[7]|OT_FAULT|r, Latched|0|1: over-temperature Warning has occurred.|
|[6]|OT_WARNING|r, Latched|0|1: over-temperature Warning has occurred.|
|[5:0]|Reserved|r|0|Always read as 0|



## **STATUS_ CML (7Eh)** 

**Table 44. STATUS_ CML** 

|**STATUS_ CML (7Eh)**|**STATUS_ CML (7Eh)**<br>**Table 44. STATUS_ CML**|**STATUS_ CML (7Eh)**<br>**Table 44. STATUS_ CML**|**STATUS_ CML (7Eh)**<br>**Table 44. STATUS_ CML**|**STATUS_ CML (7Eh)**<br>**Table 44. STATUS_ CML**|**STATUS_ CML (7Eh)**<br>**Table 44. STATUS_ CML**|**STATUS_ CML (7Eh)**<br>**Table 44. STATUS_ CML**|**STATUS_ CML (7Eh)**<br>**Table 44. STATUS_ CML**|**STATUS_ CML (7Eh)**<br>**Table 44. STATUS_ CML**|
|---|---|---|---|---|---|---|---|---|
|Command|STATUS_CML||||||||
|Format|Unsigned binary||||||||
|Bit|7|6|5|4|3|2|1|0|
|Access|r|r|r|r|r|r|r|r|
|Function|Invalid unsupported<br>command|Invalid<br>/unsupported data|x|Memory fault<br>detected|x|x|Other fault|Memory<br>busy|
|Default Value|0|0|0|0|0|0|0|0|



## **READ_VIN (88h)** 

The READ_VIN command returns the 10-bit measured value of the input voltage. 

**Table 45. READ_ VIN** 

|Command<br>~~a~~<br>~~Rs~~|READ_VIN|READ_VIN|READ_VIN|READ_VIN|READ_VIN|READ_VIN|READ_VIN|READ_VIN|READ_VIN|READ_VIN|READ_VIN|READ_VIN|READ_VIN|READ_VIN|READ_VIN|READ_VIN|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Format<br>~~Rs~~<br>~~po~~|Direct||||||||||||||||
|Bit<br>~~Rs~~<br>~~po~~<br>~~po~~|15|14|13|12|11|10|9|8|7|6|5|4|3|2|1|0|
|Access<br>~~po~~<br>~~po~~|r|r|r|r|r|r|r|r|r|r|r|r|r|r|r|r|
|Function<br>~~po~~<br>~~a~~<br>~~pO~~|x||||||25mV/LSB||||||||||
|DefaultValue<br>~~pO~~|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|



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**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

## MonoBK™ 24A DC–DC Converter Series 

## **READ_VOUT (8Bh)** 

The READ_VOUT command returns the 13-bit measured value of the output voltage. 

## **Table 46. READ_ VOUT** 

||**Table 46. READ_ VOUT**|**Table 46. READ_ VOUT**|**Table 46. READ_ VOUT**|**Table 46. READ_ VOUT**|**Table 46. READ_ VOUT**|**Table 46. READ_ VOUT**|**Table 46. READ_ VOUT**|**Table 46. READ_ VOUT**|**Table 46. READ_ VOUT**|**Table 46. READ_ VOUT**|**Table 46. READ_ VOUT**|**Table 46. READ_ VOUT**|**Table 46. READ_ VOUT**|**Table 46. READ_ VOUT**|**Table 46. READ_ VOUT**|**Table 46. READ_ VOUT**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Command<br>~~a~~<br>~~Re~~|READ_VOUT||||||||||||||||
|Format<br>~~a~~<br>~~Re~~<br>~~po~~|Direct||||||||||||||||
|Bit<br>~~Re~~<br>~~po~~<br>~~po~~|15|14|13|12|11|10|9|8|7|6|5|4|3|2|1|0|
|Access<br>~~po~~<br>~~po~~|r|r|r|r|r|r|r|r|r|r|r|r|r|r|r|r|
|Function<br>~~po~~<br>~~a~~|x|||1.25mV/LSB|||||||||||||
|Default Value<br>~~a~~<br>~~pC~~|0<br>~~pC~~|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|



## **READ_IOUT (8Ch)** 

The READ_IOUT command returns the 14-bit measured value of the output current. This value is also used to compare with the IOUT_OC_FAULT_LIMIT and IOUT_OC_WARN_LIMIT, and then affects the STATUS_IOUT. 

**Table 47. READ_ IOUT** 

|Command<br>~~a~~|READ_IOUT|READ_IOUT|READ_IOUT|READ_IOUT|READ_IOUT|READ_IOUT|READ_IOUT|READ_IOUT|READ_IOUT|READ_IOUT|READ_IOUT|READ_IOUT|READ_IOUT|READ_IOUT|READ_IOUT|READ_IOUT|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Format<br>~~a~~<br>~~po~~|Direct||||||||||||||||
|Bit<br>~~po~~|15|14|13|12|11|10|9|8|7|6|5|4|3|2|1|0|
|Access<br>~~po~~<br>~~|~~|r<br>~~a~~|r<br>~~a~~|r|r|r|r|r|r|r|r|r|r|r|r|r|r|
|Function<br>~~|~~|x<br>~~a~~||62.5mA/LSB||||||||||||||
|Default Value<br>~~|~~<br>~~pC~~|0<br>~~a~~<br>~~pC~~|0<br>~~a~~|0|0|0|0|0|0|0|0|0|0|0|0|0|0|



## **READ_TEMPERATURE_1 (8Dh)** 

The READ_TEMPERATURE_1 command returns the internal sensed temperature. This value is also used internally for the Over Temperature Fault and Warning detection. This data has a range of -255degC to +255degC. 

## **Table 48. READ_ TEMPERATURE** 

|~~Re~~|**Table 48. READ_ TEMPERATURE**|**Table 48. READ_ TEMPERATURE**|**Table 48. READ_ TEMPERATURE**|**Table 48. READ_ TEMPERATURE**|**Table 48. READ_ TEMPERATURE**|**Table 48. READ_ TEMPERATURE**|**Table 48. READ_ TEMPERATURE**|**Table 48. READ_ TEMPERATURE**|**Table 48. READ_ TEMPERATURE**|**Table 48. READ_ TEMPERATURE**|**Table 48. READ_ TEMPERATURE**|**Table 48. READ_ TEMPERATURE**|**Table 48. READ_ TEMPERATURE**|**Table 48. READ_ TEMPERATURE**|**Table 48. READ_ TEMPERATURE**|**Table 48. READ_ TEMPERATURE**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Command<br>~~Re~~|READ_IOUT||||||||||||||||
|Format<br>~~Re~~<br>~~a~~<br>~~po~~|Direct||||||||||||||||
|Bit<br>~~po~~<br>~~po~~|15<br>|14<br>|13<br>|12<br>|11<br>|10<br>|9<br>|8<br>|7<br>|6<br>|5<br>|4<br>|3<br>|2<br>|1<br>|0<br>|
|Access<br>~~po~~<br>~~po~~|r<br>|r<br>|r<br>|r<br>|r<br>|r<br>|r<br>|r<br>|r<br>|r<br>|r<br>|r<br>|r<br>|r<br>|r<br>|r<br>|
|Function<br>~~poeG~~|x<br>~~eG~~||||||Sign<br>~~eG~~|1degC/LSB<br>~~eG~~|||||||||
|DefaultValue<br>~~pT~~|0<br>~~pT~~|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|



READ_TEMPERATURE_1 is a 2-byte, twos complement integer. The bit [9] is the sign bit. Below table shows the relationship between direct value and real word value. 

## **Table 49. READ_ TEMPERATURE** 

|**SING**|**DIRECT VALUE**|**REAL VALUE [degC]**|
|---|---|---|
|0|0 0000 0000|0|
|0|0 0000 0001|1|
|0|1 1111 111|+511|
|1|0 0000 0000|-511|
|1|1 1111 1111|-1|



## **PMBus[TM] _REVISION (98h)** 

The PMBus[TM] _REVISION command returns the protocol revision we used. Accesses to this command should use the read byte protocol. Bits [7:4] indicate the PMBus[TM] revision of specification Part I to which the device is compliant. Bits [3:0] indicate the revision of specification Part II to which the device is compliant. 

**Table 50. PMBus[TM] _REVISION** 

||**Table 50. PMBus[TM]_REVISION**|**Table 50. PMBus[TM]_REVISION**|**Table 50. PMBus[TM]_REVISION**|**Table 50. PMBus[TM]_REVISION**|**Table 50. PMBus[TM]_REVISION**|**Table 50. PMBus[TM]_REVISION**|**Table 50. PMBus[TM]_REVISION**|**Table 50. PMBus[TM]_REVISION**|
|---|---|---|---|---|---|---|---|---|
|Command|PMBusTMREVISION||||||||
|Format|Unsi<br>gned binary||||||||
|Bit|7|6|5|4|3|2|1|0-|
|Access|r|r|r|r|r|r|r|r|
|Default Value|0|0|1|1|0|0|1|1|



Bits [7:4] always reads as 4’b0011, specification PMBus[TM] Part I Revision 1.3. Bits [3:0] always reads as 4’b0011, specification PMBus[TM] Part II Revision 1.3. 

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**MYMGM1R824ELA5RN** 

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## MonoBK™ 24A DC–DC Converter Series 

## **MFR_CTRL_VOUT (D1h)** 

The MFR_CTRL_VOUT command is used to adjust the output voltage behaviors of this product. 

**Table 51. MFR_CTRL_VOUT** 

|**BITS**|**NAME**|**BEHAVIOR **|**DEFAULT**|**DESCRIPTION **|
|---|---|---|---|---|
|[7]|Reserved|Live|0|N/A|
|[6]|Vo Discharge|Live|0|1: output voltage discharge at CTRL low.<br>0: no active output voltage discharge.|
|[5:0]|Reserved|Live|0|N/A|



Bit[6] (Vo discharge): Enable or disable active output voltage discharge when this product  is commanded off through CTRL or  the OPERATION command. 

## **MFR_ADDR_PMBus[TM] (D3h)** 

**Table 52. MFR_ADDR_PMBus[TM]** 

|**[TM] (D3h)**|**Table 52. MFR_ADDR_PMBus[TM]**|**Table 52. MFR_ADDR_PMBus[TM]**|**Table 52. MFR_ADDR_PMBus[TM]**|**Table 52. MFR_ADDR_PMBus[TM]**|**Table 52. MFR_ADDR_PMBus[TM]**|**Table 52. MFR_ADDR_PMBus[TM]**|**Table 52. MFR_ADDR_PMBus[TM]**|**Table 52. MFR_ADDR_PMBus[TM]**|
|---|---|---|---|---|---|---|---|---|
|Command|MFR_ADDR_PMBusTM||||||||
|Format|Direct||||||||
|Bit|7|6|5|4|3|2|1|0-|
|Access|r/w|r/w|r/w|r/w|r/w|r/w|r/w|r/w|
|Function|Enable|ADDR|||||||
|Default Value|0|0|0|0|0|0|0|0|



Bit[7] (enable bit): 

1: the address is decided by MFR_ADDR_PMBus[TM] [6:0]. 

0: the address is decided by ADDR pin. The default value of D3h is 0x00. 

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**MYMGM1R824ELA5RN** 

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MonoBK™ 24A DC–DC Converter Series 

## **Application Information** 

## **Application Circuit** 

**==> picture [470 x 200] intentionally omitted <==**

**----- Start of picture text -----**<br>
Sense<br>VIN-Sense<br>VIN VOUT-Sense<br>C12 C11 C21 C1 VIN VOUT<br>R21<br>OQ—---- R1 4 444770 VOUT<br>+ D1 al EN +SENSETRIM in R2 C3 | C5 | C13 C15<br>R4 ADDR<br>PGOOD<br>CLK R26 R11 C4 C6 C14 C16<br>D4 DATA R12<br>GND ALERT AGND GND<br>W a GND  GND Oo<br>C22 C2<br>O C7 O tlle | ut GND-Sense<br>vues XN ><br>GND-Sense<br>AGND<br>ON/OFF<br>PWGOOD<br>SCL<br>SDA<br>ALT<br>**----- End of picture text -----**<br>


**Figure 30. Application Circuit** 

## **Application Circuit Part List** 

An Example of the standard components are shown in Table 53. Components must be chosen referring the system requirement like Voltage, Temperature, etc. 

**Table 53. Application Circuit Part List** 

|**REFERENCE**|**VALUE**|**DESCRIPTION**|**PART AND EQUIPMENT**|
|---|---|---|---|
|C1, C2|22uF|Input Capacitor<br>Ceramic capacitor, 22uF, 25V, ±10%, X7R|GRM32ER71E226KE15 (Murata)|
|C3, C4, C5|220uF|Output Capacitor<br>Ceramic capacitor, 100uF, 4V, ±20%, X7U|GRM32EC80G227ME05 (Murata)|
|R21|0 ohm|Chip resister|RK73Z1JTTD(KOA)|
|R11, R12|-|Chip resistor, 1/10W, ±0.5%<br>The value is determined by the target output voltage.||
|R1,R4|10kohm|Chip resistor, 1/10W, ±5.0%|RK73B1JTTD103J (KOA)|
|R26|-|Chip resistor, 1/10W, ±0.5%<br>The value is determined by the target PMBusTMaddress.||
|D1, D4|3.3V|Zenner Diode|EDZV3.3B (ROHM)|
|C7|1500uF/25V|Electrolysis Capacitor (Optinal)||



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**MYMGM1R824ELA5RN** Document Category: Datasheet 

## MonoBK™ 24A DC–DC Converter Series 

## **Example of Pattern Layout (Top View)** 

**==> picture [45 x 10] intentionally omitted <==**

**----- Start of picture text -----**<br>
Top View<br>**----- End of picture text -----**<br>


**Figure 31. Example of Pattern Layout (Top View)** 

## **Application Board Example** 

**Figure 32. Application Board Example** 

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**MYMGM1R824ELA5RN** Document Category: Datasheet 

MonoBK™ 24A DC–DC Converter Series 

## **Component Selection** 

## **Input Fuse** 

Certain applications and/or safety agencies may require fuses at the inputs of power conversion components. Fuses should also be used when there is the possibility of sustained input voltage reversal which is not current limited. For greatest safety, we recommend a fast blow fuse installed in the ungrounded input supply line. The installer must observe all relevant safety standards and regulations. For safety agency approvals, install the converter in compliance with the end-user safety standard. 

## **Recommended Input Filtering** 

The user must assure that the input source has low AC impedance to provide dynamic stability and that the input supply has little or no inductive content, including long distributed wiring to a remote power supply. For best performance, we recommend installing a low-ESR capacitor immediately adjacent to the converter’s input terminals. 

The capacitor should be a ceramic type such as the Murata GRM32 series and a electrolytic type such as Panasonic OS-CON series. Initial suggested capacitor values are 22uF x 2 ceramic type and 1000uF x 1 electrolytic type, rated at twice the expected maximum input voltage. Make sure that the input terminals do not go below the under voltage shutdown voltage at all times. More input bulk capacitance may be added in parallel (either electrolytic or tantalum) if needed. 

## **Recommended Output Filtering** 

The converter will achieve its rated output ripple and noise with additional external capacitor. The user may install more external output capacitance reduce the ripple even further or for improved dynamic response. Again, use low-ESR ceramic (Murata GRM32 series). Initial values of 220uF x 3 ceramic type may be tried, either single or multiple capacitors in parallel. Mount these close to the converter. Measure the output ripple under your load conditions. Use only as much capacitance as required to achieve your ripple and noise objectives. Excessive capacitance can make step load recovery sluggish or possibly introduce instability. Do not exceed the maximum rated output capacitance listed in the specifications. 

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**MYMGM1R824ELA5RN** Document Category: Datasheet 

MonoBK™ 24A DC–DC Converter Series 

## **Packaging Information** 

This section provides packaging data including the moisture sensitivity level, package drawing, package marking and tape-and-reel information. 

## **Package Drawing** 

**==> picture [419 x 393] intentionally omitted <==**

**----- Start of picture text -----**<br>
G  F  E  D C  B  A<br>1  0.85<br>0.4<br>N I N I \ I \ I \ I N I \ I E<br>2  NINI\I\I\I \ I \ E 0.850.4<br>3  0.85<br>N I N I \ I \ I N I \ I \IE 0.4<br>4  0.85<br>\ N I N I\NI \ I \ NI\I\E 0.4<br>5  0.85<br>NINI\I\I\I V i \ E 0.4<br>6  \ I N M I \ I\I\NI \ I\E 0.850.4<br>7  NININI\I\I \ I \ E 0.850.4<br>8  NN VN NV N L 0.85<br>0.45<br>Unit: mm  0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.325<br>9.0<br>Tolerances<br>TIT 0.4 0.4 0.4 0.4 IIT 0.4 0.4<br>±  0.15mm<br>Top View<br>Bottom View<br>10.5<br>5.0max.<br>**----- End of picture text -----**<br>


**==> picture [47 x 9] intentionally omitted <==**

**----- Start of picture text -----**<br>
Side View<br>**----- End of picture text -----**<br>


**Figure 33. Package Outline Drawing** 

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**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

MonoBK™ 24A DC–DC Converter Series 

## **Recommended Board Land Pattern (Top View)** 

**==> picture [268 x 304] intentionally omitted <==**

**----- Start of picture text -----**<br>
A  B  C  D  E  F  G<br>1  0.95<br>0.3<br>2  0.95<br>0.3<br>3  0.95<br>0.3<br>4  0.95<br>0.3<br>5  0.95<br>0.3<br>6  0.95<br>0.3<br>7  0.95<br>0.3<br>8  0.95<br>0.4<br>0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.275<br>| 0.3 _f 0.3 _J 0.3 _f 0.3 _f 0.3 _/ 0.3<br>**----- End of picture text -----**<br>


**Figure 34.  Recommended Board Land Pattern (Top View)** 

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**MYMGM1R824ELA5RN** 

## Document Category: Datasheet 

MonoBK™ 24A DC–DC Converter Series 

## **Tape and Reel Information** 

## **Tape Dimension** 

**==> picture [40 x 38] intentionally omitted <==**

**----- Start of picture text -----**<br>
Unit: mm<br>Section B-B<br>**----- End of picture text -----**<br>


**Figure 35. Tape Dimension** 

## **Reel Dimension** 

**==> picture [407 x 236] intentionally omitted <==**

**----- Start of picture text -----**<br>
25.5± 1.0<br>A<br>2.0 ± 0.5<br>Indication Unit: mm<br>φ 21.0 ± 0.8 φ 13.0 ± 0.5<br>Portion A<br>1 2<br>± ±<br>100 330<br>φ φ<br>**----- End of picture text -----**<br>


**Figure 36. Reel Dimension** 

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**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

## MonoBK™ 24A DC–DC Converter Series 

## **Tape Specifications** 

**==> picture [419 x 267] intentionally omitted <==**

**----- Start of picture text -----**<br>
Empty portion Empty portion Leader portion<br>(200mm  MIN) (180mm  MIN) (200mm  MIN)<br>; SOQ "Module on  tape" portion<br>V A N<br>Indication<br>Circle Hole<br>><br>OOO O O O 0 O<br>No.1 Pin<br>M M Pulling Direction<br>EI E)-<br>**----- End of picture text -----**<br>


**Figure 37. Tape Specifications** 

Notes 

1. The adhesive strength of the protective tape must be within 0.3-1.0N. 

2. Each reel contains the quantities such as the table below. 

3. Each reel set in moisture-proof packaging because of MSL 3. 

4. No vacant pocket in “Module on tape” section. 

5. The reel is labeled with Murata part number and quantity. 

6. The color of reel is not specified. 

## **Soldering Guidelines** 

Murata recommends the specifications below when installing these converters. These specifications vary depending on the solder type. 

Exceeding these specifications may cause damage to the product. Your production environment may differ therefore please thoroughly review these guidelines with your process engineers. This product can be reflowed once. 

**Table 54. Reflow Solder Operations for Surface-Mount Products** 

**==> picture [265 x 96] intentionally omitted <==**

**----- Start of picture text -----**<br>
For Sn/Ag/Cu BASED SOLDERS:<br>Preheat Temperature  Less than 1degC per second<br>Time Over Liquidus.  45 to 75 seconds<br>Maximum Peak Temperature   250degC<br>Cooling Rate  Less than 3degC per second<br>For Sn/Pb BASED SOLDERS<br>Preheat Temperature  Less than 1degC per second<br>Time Over Liquidus.  60 to 75 seconds<br>Maximum Peak Temperature   235degC<br>Cooling Rate  Less than 3degC per second<br>**----- End of picture text -----**<br>


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**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

MonoBK™ 24A DC–DC Converter Series 

## **Recommended Lead-free Solder Reflow Profile** 

**Figure 38.  Recommended Lead-free Solder Reflow Profile** 

CAUTION: Do not reflow the converter as follows, because the converter may fall from the substrate  during reflowing. 

## **Pb-free Solder Processes** 

For Pb-free solder processes, the product is qualified for MSL 3 according to IPC/JEDEC standard J-STD-020D. During reflow PRODUCT must not exceed 250degC at any time. 

## **Dry Pack Information** 

Products intended for Pb-free reflow soldering processes are delivered in standard moisture barrier bags according to IPC/JEDEC standard J-STD-033. 

(Handling, packing, shipping and use of moisture/reflow sensitivity surface mount devices.) 

Using products in high temperature Pb-free soldering processes requires dry pack storage and handling. In case the products have been stored in an uncontrolled environment and no longer can be considered dry, the modules must be baked according to J-STD-033. 

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**MYMGM1R824ELA5RN** Document Category: Datasheet 

MonoBK™ 24A DC–DC Converter Series 

## **Revision History** 

|**REV**|**DATE**|**DESCRIPTION**|**PAGE NUMBER**|
|---|---|---|---|
|A02|JUL-2023|Revise 2 terninal names (TRIM, ADDR) on Figure 25. Test Circuit and Figure 30.<br>Application Circuit.<br>Revise R26 connection on Figure 30. Application Circuit.|P12<br>P30<br>P30|



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**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

MonoBK™ 24A DC–DC Converter Series 

## **Notices** 

## **Scope** 

This datasheet is applied to MYMGM1R824ELA5RN and MYMGM1R824ELA5RND. - Specific applications: Consumer Electronics, Industrial Equipment 

CAUTION 

## **Limitation of Applications** 

The products listed in the datasheet (hereinafter the product(s) is called the “Product(s)”) are designed and manufactured for applications specified in the specification or the datasheet. (hereinafter called the “Specific Application”). We shall not warrant anything in connection with the Products including fitness, performance, adequateness, safety, or quality, in the case of applications listed in from (1) to (11) written at the end of this precautions, which may generally require high performance, function, quality, management of production or safety. Therefore, the Product shall be applied in compliance with the specific application. 

We disclaim any loss and damages arising from or in connection with the products including but not limited to the case such loss and damages caused by the unexpected accident, in event that (i) the product is applied for the purpose which is not specified as the specific application for the product, and/or (ii) the product is applied for any following application purposes from (1) to (11)  (except that such application purpose is unambiguously specified as specific application for the product in our catalog specification forms, datasheets, or other documents officially issued by us*). 

- (1) Aircraft equipment 

- (2) Aerospace equipment 

- (3) Undersea equipment 

- (4) Power plant control equipment 

- (5) Medical equipment 

- (6) Transportation equipment (such as vehicles, trains, ships) 

- (7) Traffic control equipment 

- (8) Disaster prevention / crime prevention equipment 

- (9) Industrial data-processing equipment 

- (10) Combustion/explosion control equipment 

- (11) Application of similar complexity and/or reliability requirements to the applications listed in the above 

For exploring information of the Products which will be compatible with the particular purpose other than those specified in the datasheet, please contact our sales offices, distribution agents, or trading companies with which you make a deal, or via our web contact form. 

Contact form: https://www.murata.com/contactform 

*We may design and manufacture particular Products for applications listed in (1) to (11). Provided that, in such case we shall unambiguously specify such Specific Application in specification or datasheet without any exception. Therefore, any other documents and/or performances, whether exist or non-exist, shall not be deemed as the evidence to imply that we accept the applications listed in (1) to (11). 

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**MYMGM1R824ELA5RN** Document Category: Datasheet 

MonoBK™ 24A DC–DC Converter Series 

## **Fail-Safe Function** 

Be sure to add an appropriate fail-safe function to your finished product to prevent secondary damage in the unlikely event of an abnormality function or malfunction in our product. 

Please connect the input terminal by right polarity. If you mistake the connection, it may break the DCDC converter. In the case of destruction of the DC-DC converter inside, over input current may flow. Please add a diode and fuse as following to protect them. 

**==> picture [252 x 54] intentionally omitted <==**

**----- Start of picture text -----**<br>
fuse<br>+ +<br>+ +<br>diode IN OUT Load<br>- -<br>**----- End of picture text -----**<br>


Please select diode and fuse after confirming the operation. 

**Figure 39. Circuit example with a diode and fuse** 

Note 

1. Please make sure that your product has been evaluated in view of your specifications with our product being mounted to your product. 

2. You are requested not to use our product deviating from the reference specifications. 

3. If you have any concerns about materials other than those listed in the RoHS directive, please contact us. 

4. Please don’t wash this product under any conditions. 

## **Product Specification** 

Product Specification in this datasheet are as of May 2023. Specifications and features may change in any manner without notice. Please check with our sales representatives. 

## **Contact Form** 

https://www.murata.com/contactform?Product=Power%20Device 

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**MYMGM1R824ELA5RN** 

Document Category: Datasheet 

MonoBK™ 24A DC–DC Converter Series 

## **Disclaimers** 

The information described in this data sheet was carefully crafted for accuracy. However this product is based on the assumption that it will be used after thoroughly verifying and confirming the characteristics and system compatibility. Therefore, Murata is not responsible for any damages caused by errors in the description of the datasheet. 

Murata constantly strives improve the quality and reliability of our products, but it is inevitable that semiconductor products will fail with a certain probability. Therefore regardless of whether the use conditions are within the range of this data sheet, Murata is not responsible for any damage caused by the failure of this product., (for example, secondary damage, compensation for accidents, punitive damage, loss of opportunity, and etc.) Also, regardless of whether Murata can foresee the events caused by the failure of our product, Murata has no obligations or responsibilities. 

The buyer of this product and developer of systems incorporating this product must analyze, evaluate, and make judgements at their own risk in designing applications using this product. The buyer and the developer are responsible for verifying the safety of this product and the applications, and complying with all applicable laws, regulations, and other requirements. 

Furthermore, the buyer and developer are responsible for predicting hazards and taking adequate safeguards against potential events at your own risk in order to prevent personal accidents, fire accidents, or other social damage. When using this product, perform thorough evaluation and verification of the safety design designed at your own risk for this product and the application. 

Murata assumes that the buyer and developer have the expertise to verify all necessary issues for proper use of the product as described above and to take corrective action. Therefore, Murata has no liability arising out of the use of the product. The buyer and developer should take all necessary evaluations, verifications, corrective actions and etc., in your own responsibility and judgment. 

This data sheet does not guarantee or grant any license to the information, including patents, copyrights, and other intellectual property rights, of the Murata or third parties. Regardless of whether the information described in this datasheet is express or implied, Murata does not take any responsibility or liability for any claims, damages, costs, losses, etc. relating to intellectual property rights or other rights from third parties due to the use of these information. 

## **Patent Statement** 

Murata products are protected to under one or more of the U.S. patents. 

## **Copyright and Trademark** 

©2023 Murata Manufacturing Co., Ltd. All rights reserved. 

This product is subject to the following operating requirements and the Life and Safety Critical Application Sales Policy. ! Refer to: **https://www.murata.com/products/power/requirements** 

Murata Manufacturing Co., Ltd makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. 

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