MYMGK1R812ERSR-H

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

■MYMGK1R812 Series 

■MYMGK1R812-H Series 

## **Typical unit** 

## **FEATURES** 

■Settable output voltage from 

0.7 to 1.8V 

■Up to 12A of output current 

■Quick response to load change 

- ■Ultra  small  surface mount package 

10.5 x 9.0 x 5.6mm 

■High efficiency of 93.2% max. 

■Outstanding thermal derating performance 

■Over current protection 

■On/Off control (Positive logic) 

■Power Good signal 

■High Reliability 

- ■Meets CISPR 32 class B conducted emission 

## **PRODUCT OVERVIEW** 

The **MYMGK1R812 series** are miniature MonoBK[TM] , called “MonoBlock”, non-isolated Point-of-Load (PoL) DC-DC power converter for embedded applications. The small form factor measures only 10.5 x 9.0 x 5.6mm. Applications include powering FPGA/CPU’s, datacom/telecom systems, Distributed Bus Architectures (DBA), programmable logic and mixed voltage systems. 

The converters have input voltage ranges of 4.5 to 8.0V or 8.0 to 15.0V and  a maximum output current of 20A. Based on a fixed frequency synchronous buck converter switching topology, this high power conversion efficient PoL module features settable output voltage 0.7 to 1.8V, On/Off control and Power Good signal output. 

These converters also include under voltage lock out (UVLO), output short circuit protection and over-current protection. 

**SIMPLIFIED APPLICATION** 

MYMGK1R812 Series / MYMGK1R812-H series 

Vin Vin Vout Vout Sense Cin ~~O~~ N/OFF Co Trim GND Power Good ~~oat~~ MYMGK1R812FRSR/MYMGK1R812FRSR-H MYMGK1R812ERSR/MYMGK1R812ERSR-H Cin：47uF/10V x 2pcs (4.5≤Vin≤5.5V) Cin：22uF/25V：22uF/25V22uF/25V x 2pcs or   22uF/25V    x 2pcs (5.5<Vin≤8.0V) Cout：220uF/4V：220uF/4V220uF/4V x 3pcs Cout：220uF/4V x 3pcs 

MYMGK1R812ERSR/MYMGK1R812ERSR-H Cin：22uF/25V：22uF/25V22uF/25V x 2pcs Cout：220uF/4V：220uF/4V220uF/4V x 3pcs 

(Typical topology is shown. Murata recommends an external input fuse.) 

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

Export Control Code:X0863  Document No.: DC_R200006 

MYMGK1R812 Series A04 Page 1 of 24 

**==> picture [488 x 441] intentionally omitted <==**

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|||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|MYMGK1R812 Series|
|muPata|
|MonoBK|[TM]|, 12A DC-DC Converter|
|PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE|(Including series products)|
|OUTPUT|INPUT|
|eeee|
|PART NUMBER|Vout|Iout|Power|R/N typ.|Regulation(max.)|Vin typ.|Range|Iin no load|Iin full load|Efficiency(%)|ON/OFF|Package(mm)|
|(V)|(A,max.)|(W)|(% of Vout)|(V)|(V)|(mA)|(A)|
|Line(%)|Load(%)|
|eet|
|0.7-1.8|Yes|
|MYMGK1R812FRSR|12|21.6|0.8|±3.0|±1.0|5|4.5 - 8|100|4.7|92|10.5 x 9.0 x 5.6|
|(typ.:1.8V)|(Positive)|
|ee|LL|
|0.7-1.8|Yes|
|MYMGK1R812ERSR|12|21.6|0.8|±1.5|±1.0|12|8 - 15|50|2.0|90.4|10.5 x 9.0 x 5.6|
|(typ.:1.8V)|(Positive)|
|ee|ee|es|ee|eee|ee|ee|ee|ee|ee|ee|es|
|0.7-1.8|Yes|
|MYMGK1R812FRSR-H|12|21.6|0.8|±3.0|±1.0|5|4.5 - 8|100|4.7|92|10.5 x 9.0 x 5.6|
|(typ.:1.8V)|(Positive)|
|ee|ee|ee|eee|ee|ee|ee|ee|ee|ee|ee|
|0.7-1.8|Yes|
|MYMGK1R812ERSR-H|12|21.6|0.8|±1.5|±1.0|12|8 - 15|50|2.0|90.4|10.5 x 9.0 x 5.6|
|a|es|(typ.:1.8V)|es ee|ee|es|ee ee|(Positive)|es|
|0.7-1.8|Yes|
|MYMGK1R812FRSRD|12|21.6|0.8|±3.0|±1.0|5|4.5 - 8|100|4.7|92|10.5 x 9.0 x 5.6|
|(typ.:1.8V)|(Positive)|
|ae|ee|ee|ee|ee|ee|re|ed|ee|
|0.7-1.8|Yes|
|MYMGK1R812ERSRD|12|21.6|0.8|±1.5|±1.0|12|8 - 15|50|2.0|90.4|10.5 x 9.0 x 5.6|
|a|(typ.:1.8V)|eeee|eeee|eeeeee|ee|eeee|eeee|eses|eeee|eees|eees|(Positive)|es|
|0.7-1.8|Yes|
|MYMGK1R812FRSR-HD|12|21.6|0.8|±3.0|±1.0|5|4.5 - 8|100|4.7|92|10.5 x 9.0 x 5.6|
|(typ.:1.8V)|(Positive)|
|ee|ee|ee|eee|ee|ee|ee|ee|ee|ee|ee|
|0.7-1.8|Yes|
|MYMGK1R812ERSR-HD|12|21.6|0.8|±1.5|±1.0|12|8 - 15|50|2.0|90.4|10.5 x 9.0 x 5.6|
|(typ.:1.8V)|(Positive)|
|ee|es|ee|es|ee|es|ee|
|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 is 22uF x 2 or 47uF 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.|
|PART NUMBER STRUCTURE|
|MY|MGK|1R8|12|F|R|S|R|- H|D|
|Murata products|Packaging Code|
|Maximum Output Current|Internal Code|Internal Code|Blank:Standard Quantity|
|Series Name|12 : 12A|D:small Quantity|
|v|y|7 -|||,|
|Maximum Output Voltage|Input Voltage Range|ON/OFF Control Logic|Operating Temperature|
|1R8 : (0.7-1.8V)|F : 4.5-8.0V|S : Positive Logic|-H:-40 to 105 degC|
|E : 8.0-15.0V|

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## **Product Marking** 

Because of the small size of these products, the product marking contains a character-reduced code to indicate the model number and manufacturing date code. Not all items on the marking are always used. Please note that the marking differs from the product photograph. Here is the layout of the Marking . 

## ■MYMGK1R812 Series 

## **Layout** （ **reference)** 

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||||
|---|---|---|
|Codes(reference)|
|CM|
|1R812FRS|1Pin|Marking|
|1R812FRSR-H|Product code|
|(Please see product code table beside)|
|□|Internal Manufacturing code|

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|||
|---|---|
|Part Number|Product Code|
|MYMGK1R812FRSR|1R812FRS|
|MYMGK1R812ERSR|1R812ERS|
|MYMGK1R812FRSRD|1R812FRS|
|MYMGK1R812ERSRD|1R812ERS|
|MYMGK1R812FRSR-H|1R812FRSR-H|
|MYMGK1R812RSR-H|1R812ERSR-H|
|MYMGK1R812FRSR-HD|1R812FRSR-H|
|MYMGK1R812ERSR-HD|1R812ERSR-H|

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## ■MYMGK1R812-H Series 

**Layout** （ **reference)** 

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**----- Start of picture text -----**<br>
||||
|---|---|---|
|M|1R812|Codes(reference)|
|FRSR-H|
|1Pin|Marking|
|1R812FRSR-H|Product code|
|(Please see product code table beside)|
|□|Internal Manufacturing code|

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


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

MYMGK1R812 Series A04 Page 2 of 24 

**MYMGK1R812 Series** 

MonoBK[TM] , 12A DC-DC Converter 

## **COMMON SPECIFICATION** 

|**ABSOLUTE MAXIMUM RATINGS**|**Conditions**|**Minimum**|**Typical**|**Maximum**|**Units**|
|---|---|---|---|---|---|
|Input Voltage<br>~~Pf~~|~~Pf~~|-0.3<br>~~Pf~~|~~Pf~~|9.6<br>~~Pf~~|V<br>~~Pf~~|
|ON/OFF Pin<br>~~Pf~~<br>~~GG~~|Power on,referred to -Vin<br>~~Pf~~<br>~~GG~~|-0.3<br>~~Pf~~<br>~~GG~~|~~Pf~~<br>~~GG~~|Vin-1.5<br>~~Pf~~<br>~~GG~~|V<br>~~Pf~~<br>~~GG~~|
|PGOOD/Trim Pins<br>~~a~~|Power on,referred to -Vin||Source ONLY|||
|Vout<br>~~a~~<br>~~GO~~|~~GO~~|0.7<br>~~GO~~|~~GO~~|2.0<br>~~GO~~|V<br>~~GO~~|
|Output Current<br>~~GO~~<br>~~GG~~|Current-limited,no damage, short-circuitprotected<br>~~GO~~<br>~~GG~~|0<br>~~GO~~<br>~~GG~~|~~GO~~<br>~~GG~~|12<br>~~GO~~<br>~~GG~~|A<br>~~GO~~<br>~~GG~~|
|Storage Temperature Range<br>~~OT~~|Vin = Zero(nopower)<br>~~OT~~|-40<br>~~OT~~|~~OT~~|125<br>~~OT~~|degC<br>~~OT~~|
|Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other<br>than those listed in the Performance/Functional Specifications Table is not implied or recommended.<br>~~OT~~||||||
|**INPUT**<br>~~OT~~|**Conditions**<br>~~OT~~|**Minimum**<br>~~OT~~|**Typical**<br>~~OT~~|**Maximum**<br>~~OT~~|**Units**<br>~~OT~~|
|OperatingVoltage Range<br>~~Pf~~|~~Pf~~|4.5<br>~~Pf~~|5<br>~~Pf~~|8<br>~~Pf~~|V<br>~~Pf~~|
|Start-upThreshold<br>~~a~~|Risinginput voltage||4.3||V|
|Under Voltage Shutdown<br>~~a~~<br>~~OO~~|Note 12<br>~~OO~~|~~OO~~|4.1<br>~~OO~~|~~OO~~|V<br>~~OO~~|
|Internal Filter Type<br>~~OO~~<br>~~GD~~|~~OO~~<br>~~GD~~|~~OO~~<br>~~GD~~|Capacitive<br>~~OO~~<br>~~GD~~|~~OO~~<br>~~GD~~|~~OO~~<br>~~GD~~|
|Input Current<br>~~PT~~<br>~~(~~||||||
|Full Load Conditions<br>~~PT~~<br>~~OG~~|Vin = 5.0V,Vout = 1.8V,Iout = 12A<br>~~PT~~<br>~~OG~~|~~PT~~<br>~~OG~~|4.7<br>~~PT~~<br>~~OG~~<br>~~(~~|~~PT~~<br>~~OG~~|A<br>~~PT~~<br>~~OG~~|
|Low Line<br>~~OG~~<br>~~GG~~|Vin = 4.5V,Vout = 1.8V,Iout = 12A<br>~~OG~~<br>~~GG~~|~~OG~~<br>~~GG~~|5.2<br>~~OG~~<br>~~(~~<br>~~GG~~|~~OG~~<br>~~GG~~|A<br>~~OG~~<br>~~GG~~|
|No Load Current<br>~~a~~|Iout=0A,unit = ON|~~GG~~|100<br>~~GG~~||mA|
|Shut-Down Mode Input Current<br>~~a~~<br>~~DC~~|~~DC~~|~~DC~~<br>~~GG~~|1<br>~~DC~~<br>~~GG~~|~~DC~~|mA<br>~~DC~~|
|**GENERAL and SAFETY**<br>~~DC~~<br>~~PR~~|**Conditions**<br>~~DC~~<br>~~ry———ry——r———qe~~|**Minimum**<br>~~DC~~<br>~~GG~~<br>~~ry———ry——r———qe~~|**Typical**<br>~~DC~~<br>~~GG~~<br>~~ry———ry——r———qe~~|**Maximum**<br>~~DC~~<br>~~ry———ry——r———qe~~|**Units**<br>~~DC~~<br>~~ry———ry——r———qe~~|
|Efficiency<br>~~PR~~|Vin = 5.0V,Vout = 1.8V,Iout = 12A<br>~~ry———ry——r———qe~~|~~ry———ry——r———qe~~|92.0<br>~~ry———ry——r———qe~~|~~ry———ry——r———qe~~|%<br>~~ry———ry——r———qe~~|
||Vin = 5.0V,Vout = 1.0V,Iout = 12A<br>~~ry———ry——r———qe~~<br>~~|~~|~~ry———ry——r———qe~~<br>~~|~~|90.2<br>~~ry———ry——r———qe~~<br>~~|~~|~~ry———ry——r———qe~~<br>~~|~~||
|Calculated MTBF (Note 3)<br>~~PR~~|'+40degC, Vin = 5.0V, Vout = 1.8V, Iout = 50%<br>~~ry———ry——r———qe~~<br>~~|~~|~~ry———ry——r———qe~~<br>~~|~~|8x106<br>~~ry———ry——r———qe~~<br>~~|~~|~~ry———ry——r———qe~~<br>~~|~~|Hours<br>~~ry———ry——r———qe~~|
|**DYNAMIC CHARACTERISTICS**|**Conditions**|**Minimum**|**Typical**|**Maximum**|**Units**|
|Fixed SwitchingFrequency<br>~~a~~|~~GG~~|~~GG~~|500<br>~~GG~~|~~GG~~|kHz<br>~~GG~~|
|StartupTime(Vin ON)<br>~~a~~<br>~~OG~~|Vout = 1.8V(Vout = 5% to 90% of Vout)<br>~~GG~~<br>~~OG~~|~~GG~~<br>~~OG~~|1.4<br>~~GG~~<br>~~OG~~|~~GG~~<br>~~OG~~|ms<br>~~GG~~<br>~~OG~~|
|StartupTime(Remote ON)<br>~~OG~~<br>~~OG~~|Vout = 1.8V(Vout = 5% to 90% of Vout)<br>~~OG~~<br>~~OG~~|~~OG~~<br>~~OG~~|1.4<br>~~OG~~<br>~~OG~~|~~OG~~<br>~~OG~~|ms<br>~~OG~~<br>~~OG~~|
|Dynamic Load Response<br>~~OG~~<br>~~CG~~|(50-100% load step,di/dt)<br>~~OG~~<br>~~CG~~|~~OG~~<br>~~CG~~|1.2<br>~~OG~~<br>~~CG~~|~~OG~~<br>~~CG~~|A/us<br>~~OG~~<br>~~CG~~|
|Dynamic Load Peak Deviation<br>~~CG~~<br>~~Ge~~|50-100% load step,Note15<br>~~CG~~<br>~~Ge~~|~~CG~~<br>~~Ge~~|±3.0%<br>~~CG~~<br>~~Ge~~|~~CG~~<br>~~Ge~~|% of Vout<br>~~CG~~<br>~~Ge~~|
|**FUNCTIONS**<br>~~Ge~~|**Conditions**<br>~~Ge~~|**Minimum**<br>~~Ge~~|**Typical**<br>~~Ge~~|**Maximum**<br>~~Ge~~|**Units**<br>~~Ge~~|
|Remote On/Off Control(Note 4)<br>~~PT~~||||||
|Logic<br>~~PT~~<br>~~PT~~||||||
|ON State Range<br>~~PT~~<br>~~OG~~|ON = +1.8Vmin. to +Vin-1.5V max. or left open<br>~~PT~~<br>~~OG~~|1.8<br>~~PT~~<br>~~OG~~|~~PT~~<br>~~OG~~|Vin-1.5<br>~~PT~~<br>~~OG~~|V<br>~~PT~~<br>~~OG~~|
|OFF Stage Range<br>~~OG~~<br>~~CG~~|OFF = -0.3V to +0.6V.max.<br>~~OG~~<br>~~CG~~|-0.3<br>~~OG~~<br>~~CG~~|~~OG~~<br>~~CG~~|0.6<br>~~OG~~<br>~~CG~~|V<br>~~OG~~<br>~~CG~~|
|Control Current<br>~~CG~~<br>~~a~~|Open collector/drain<br>~~CG~~|~~CG~~|~~CG~~|-<br>~~CG~~|mA<br>~~CG~~|
|Power-Good Output(Pulled upto 5.0Vreg(typ.)internally)<br>~~a~~<br>~~PT~~||||||
|PGood TRUE(HI)<br>~~PT~~<br>~~a~~<br>~~RD~~|~~PT~~<br>~~G~~|(95% of target Vout)< Vout <(113% of target Vout)<br>~~PT~~<br>~~G~~|||~~PT~~|
|PGood FALSE(LO)<br>~~a~~<br>~~RD~~|~~G~~|Out of above range<br>~~G~~||||
|PGood FALSE(LO)<br>~~RD~~<br>~~eG~~|~~G~~<br>~~eG~~|Out of above range<br>~~G~~<br>~~eG~~|||~~eG~~|



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

MYMGK1R812 Series A04 Page 3 of 24 

**MYMGK1R812 Series** 

MonoBK[TM] , 12A DC-DC Converter 

## **FUNCTIONAL SPECIFICATIONS OF MYMGK1R812FRSR/MYMGK1R812FRSR-H (Note 1)** 

|**OUTPUT**|**Conditions**|**Minimum**|**Typical**|**Maximum**|**Units**|
|---|---|---|---|---|---|
|Total Output Power<br>~~CO~~|See Derating<br>~~CO~~|0<br>~~CO~~|~~CO~~|21.6<br>~~CO~~|W<br>~~CO~~|
|Voltage<br>~~CO~~<br>~~PT~~||||||
|Output Voltage Range<br>~~GO~~|Note 10<br>~~GO~~|0.7<br>~~GO~~|~~GO~~|1.8<br>~~GO~~|V<br>~~GO~~|
|Minimum Loading<br>~~GO~~<br>~~GG~~|~~GO~~<br>~~GG~~|~~GO~~<br>~~GG~~|None<br>~~GO~~<br>~~GG~~|~~GO~~<br>~~GG~~|~~GO~~<br>~~GG~~|
|Accuracy (50% load,untrimmed)<br>~~GG~~<br>~~GG~~|Vin = 5.0V,Vout = 1.8V,Cout=660uF,Ta = 25degC<br>~~GG~~<br>~~GG~~|±1<br>~~GG~~<br>~~GG~~|||% of Vout<br>~~GG~~<br>~~GG~~|
|Over Voltage Protection<br>~~OO~~|Note 13<br>~~OO~~|>120%<br>~~OO~~|||% of Vout<br>~~OO~~|
|Under Voltage Protection<br>~~OO~~<br>~~GG~~|~~OO~~<br>~~GG~~|<70%<br>~~OO~~<br>~~GG~~|||% of Vout<br>~~OO~~<br>~~GG~~|
|Current<br>~~GG~~<br>~~PT~~||||||
|Output Current Range<br>~~OO~~|Note 2<br>~~OO~~|0<br>~~OO~~|~~OO~~|12<br>~~OO~~|A<br>~~OO~~|
|Current Limit Inception<br>~~OO~~<br>~~GD~~|After warmup<br>~~OO~~<br>~~GD~~|~~OO~~<br>~~GD~~|18<br>~~OO~~<br>~~GD~~|~~OO~~<br>~~GD~~|A<br>~~OO~~<br>~~GD~~|
|Short Circuit<br>~~GD~~<br>~~pT~~||||||
|Short Circuit Duration(remove short for recovery)<br>~~GO~~|Output shorted toground,no damage<br>~~GO~~|~~GO~~|Continuous<br>~~GO~~|~~GO~~|~~GO~~|
|Short Circuit Protection Method<br>~~GO~~|Note 5<br>~~GO~~|~~GO~~<br>~~Ge~~|Hiccup<br>~~GO~~<br>~~Ge~~|~~GO~~|~~GO~~|
|Pre-bias Start-up<br>~~Ge~~|~~Ge~~|Converter will start up if the external output voltage is<br>less than set Vout.<br>~~Ge~~<br>~~Ge~~|||~~Ge~~|
|Regulation(Note 8)<br>~~Ge~~<br>~~Ge~~<br>~~pT~~||||||
|Line Regulation<br>~~GO~~<br>~~a~~|Vin = min. to max.<br>~~GO~~|~~GO~~|~~GO~~<br>~~GO~~|±3<br>~~GO~~<br>~~GO~~|% of Vout<br>~~GO~~|
|Load Regulation(Note17)<br>~~GO~~<br>~~GG~~<br>~~a~~|Iout = min. to max.<br>~~GO~~<br>~~GG~~|~~GO~~<br>~~GG~~|~~GO~~<br>~~GG~~<br>~~GO~~|±1<br>~~GO~~<br>~~GG~~<br>~~GO~~|% of Vout<br>~~GO~~<br>~~GG~~|
|Temperature variation<br>~~GG~~<br>~~a~~|Ta = -40 to 105degC<br>~~GG~~<br>~~GG~~|~~GG~~<br>~~GG~~|±1.5<br>~~GG~~<br>~~GO~~<br>~~GG~~|~~GG~~<br>~~GO~~<br>~~GG~~|% of Vout<br>~~GG~~<br>~~GG~~|
|Total output voltage variation(Note17)<br>~~GG~~|Fixed input voltage<br>~~GG~~|~~GG~~|~~GG~~|±3.5<br>~~GG~~|% of Vout<br>~~GG~~|
|Ripple and Noise(20MHz bandwidth)<br>~~GG~~<br>~~GG~~|Note 6<br>~~GG~~<br>~~GG~~|~~GG~~<br>~~GG~~|1<br>~~GG~~<br>~~GG~~|~~GG~~<br>~~GG~~|% of Vout<br>~~GG~~<br>~~GG~~|
|External Output Capacitance Range(Note 11)<br>~~GG~~<br>~~a~~|~~GG~~<br>~~GG~~|660<br>~~GG~~<br>~~GG~~|~~GG~~<br>~~GG~~|5000<br>~~GG~~<br>~~GG~~|uF<br>~~GG~~<br>~~GG~~|



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

MYMGK1R812 Series A04 Page 4 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

## **FUNCTIONAL SPECIFICATIONS OF MYMGK1R812ERSR/MYMGK1R812ERSR-H (Note 1)** 

|**ABSOLUTE MAXIMUM RATINGS**|**Conditions**|**Minimum**|**Typical**|**Maximum**|**Units**|
|---|---|---|---|---|---|
|Input Voltage<br>~~a~~|~~a~~|-0.3<br>~~a~~|~~a~~|16<br>~~a~~|V<br>~~a~~|
|ON/OFF Pin<br>~~a~~|Power on,referred to -Vin<br>~~a~~|-0.3<br>~~a~~|~~a~~|6.3<br>~~a~~|V<br>~~a~~|
|PGOOD/Trim Pins<br>~~a~~<br>~~GO~~|Power on,referred to -Vin<br>~~a~~<br>~~GO~~|~~a~~<br>~~GO~~|Source ONLY<br>~~a~~<br>~~GO~~|~~a~~<br>~~GO~~|~~a~~<br>~~GO~~|
|Vout<br>~~GO~~<br>~~(OG~~|~~GO~~<br>~~(OG~~|0.7<br>~~GO~~<br>~~(OG~~|~~GO~~<br>~~(OG~~|2.0<br>~~GO~~<br>~~(OG~~|V<br>~~GO~~<br>~~(OG~~|
|Output Current<br>~~(OG~~<br>~~a~~|Current-limited,no damage, short-circuitprotected<br>~~(OG~~|0<br>~~(OG~~|~~(OG~~|12<br>~~(OG~~|A<br>~~(OG~~|
|Storage Temperature Range<br>~~a~~|Vin = Zero(nopower)|-40||125|degC|
|Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other<br>than those listed in the Performance/Functional Specifications Table is not implied or recommended.<br>~~SC~~||||||
|**INPUT**<br>~~SC~~|**Conditions**<br>~~SC~~|**Minimum**<br>~~SC~~|**Typical**<br>~~SC~~|**Maximum**<br>~~SC~~|**Units**<br>~~SC~~|
|OperatingVoltage Range<br>~~a~~||8|12|15|V|
|Start-upThreshold<br>~~a~~<br>~~GO~~|Risinginput voltage<br>~~GO~~|~~GO~~|4.3<br>~~GO~~|~~GO~~|V<br>~~GO~~|
|Under Voltage Shutdown<br>~~GO~~<br>~~OGG~~|Note 12<br>~~GO~~<br>~~OGG~~|~~GO~~<br>~~OGG~~|4.1<br>~~GO~~<br>~~OGG~~|~~GO~~<br>~~OGG~~|V<br>~~GO~~<br>~~OGG~~|
|Internal Filter Type<br>~~OGG~~<br>~~DG~~|~~OGG~~<br>~~DG~~|~~OGG~~<br>~~DG~~|Capacitive<br>~~OGG~~<br>~~DG~~|~~OGG~~<br>~~DG~~|~~OGG~~<br>~~DG~~|
|Input Current<br>~~DG~~<br>~~PT~~||||||
|Full Load Conditions<br>~~PT~~<br>~~a~~|Vin = 12.0V,Vout = 1.8V,Iout = 12A<br>~~PT~~|~~PT~~|2.0<br>~~PT~~|~~PT~~|A<br>~~PT~~|
|Low Line<br>~~a~~<br>~~OO~~|Vin = 8.0V,Vout = 1.8V,Iout = 12A<br>~~OO~~|~~OO~~|3.0<br>~~OO~~|~~OO~~|A<br>~~OO~~|
|No Load Current<br>~~OO~~<br>~~CG~~|Iout=0A,unit = ON<br>~~OO~~<br>~~CG~~|~~OO~~<br>~~CG~~|50<br>~~OO~~<br>~~CG~~|~~OO~~<br>~~CG~~|mA<br>~~OO~~<br>~~CG~~|
|Shut-Down Mode Input Current<br>~~CG~~<br>~~GG~~|~~CG~~<br>~~GG~~|~~CG~~<br>~~GG~~|1<br>~~CG~~<br>~~GG~~|~~CG~~<br>~~GG~~|mA<br>~~CG~~<br>~~GG~~|
|**GENERAL and SAFETY**<br>~~GG~~|**Conditions**<br>~~GG~~|**Minimum**<br>~~GG~~|**Typical**<br>~~GG~~|**Maximum**<br>~~GG~~|**Units**<br>~~GG~~|
|Efficiency|Vin = 12.0V,Vout = 1.8V,Iout = 12A<br>~~a~~|~~a~~|90.4<br>~~a~~|~~a~~|%<br>~~a~~<br>~~|~~|
||Vin = 12.0V,Vout = 1.0V,Iout = 12A<br>~~a~~<br>~~|~~|~~a~~<br>~~|~~|85.2<br>~~a~~<br>~~|~~|~~a~~<br>~~|~~||
|Calculated MTBF (Note 3)|'+40degC, Vin = 12.0V, Vout = 1.8V, Iout = 50%<br>~~|~~|~~|~~|8x106<br>~~|~~|~~|~~|hours<br>~~|~~|
|**DYNAMIC CHARACTERISTICS**|**Conditions**|**Minimum**<br>~~D~~|**Typical**|**Maximum**|**Units**|
|Fixed SwitchingFrequency<br>~~a~~|~~a~~|~~a~~<br>~~D~~|500<br>~~a~~|~~a~~|kHz<br>~~a~~|
|StartupTime(Vin ON)<br>~~a~~<br>~~OO~~|Vout = 1.8V(Vout = 5% to 90% of Vout)<br>~~a~~<br>~~OO~~|~~a~~<br>~~D~~<br>~~OO~~|1.4<br>~~a~~<br>~~OO~~|~~a~~<br>~~OO~~|ms<br>~~a~~<br>~~OO~~|
|StartupTime(Remote ON)<br>~~OO~~<br>~~a~~|Vout = 1.8V(Vout = 5% to 90% of Vout)<br>~~OO~~<br>~~GG~~|~~OO~~<br>~~GG~~|1.4<br>~~OO~~<br>~~GG~~|~~OO~~<br>~~GG~~|ms<br>~~OO~~<br>~~GG~~|
|Dynamic Load Response<br>~~OG~~|(50-100% load step,di/dt)<br>~~OG~~|~~OG~~<br>~~GG~~|1.2<br>~~OG~~<br>~~GG~~|~~OG~~|A/us<br>~~OG~~|
|Dynamic Load Peak Deviation<br>~~OG~~<br>~~RG~~|50-100% load step,Note15<br>~~OG~~<br>~~RG~~|~~OG~~<br>~~RG~~<br>~~GG~~|±3.0%<br>~~OG~~<br>~~RG~~<br>~~GG~~|~~OG~~<br>~~RG~~|% of Vout<br>~~OG~~<br>~~RG~~|
|**FUNCTIONS**<br>~~RG~~|**Conditions**<br>~~RG~~|**Minimum**<br>~~RG~~<br>~~GG~~|**Typical**<br>~~RG~~<br>~~GG~~|**Maximum**<br>~~RG~~|**Units**<br>~~RG~~|
|Remote On/Off Control(Note 4)<br>~~PT~~||||||
|Logic<br>~~PT~~<br>~~PT~~||||||
|ON State Range<br>~~PT~~<br>~~GG~~|ON = +1.8Vmin. to +6.3V max. or left open<br>~~PT~~<br>~~GG~~|1.8<br>~~PT~~<br>~~GG~~|~~PT~~<br>~~GG~~|6.3<br>~~PT~~<br>~~GG~~|V<br>~~PT~~<br>~~GG~~|
|OFF Stage Range<br>~~OG~~|OFF = -0.1V to +0.5V.max.<br>~~OG~~|-0.3<br>~~OG~~|~~OG~~|0.6<br>~~OG~~|V<br>~~OG~~|
|Control Current<br>~~OG~~<br>~~DG~~|Open collector/drain<br>~~OG~~<br>~~DG~~|~~OG~~<br>~~DG~~|~~OG~~<br>~~DG~~|-<br>~~OG~~<br>~~DG~~|mA<br>~~OG~~<br>~~DG~~|
|Power-Good Output(Pulled upto 5.0Vreg(typ.)internally)<br>~~DG~~<br>~~PT~~||||||
|PGood TRUE(HI)<br>~~CG~~|~~CG~~|(95% of target Vout)< Vout <(113% of target Vout)<br>~~CG~~|||~~CG~~|
|PGood FALSE(LO)<br>~~CG~~<br>~~a~~|~~CG~~<br>~~eC~~|Out of above range<br>~~CG~~<br>~~eC~~|||~~CG~~<br>~~eC~~|
|**OUTPUT**|**Conditions**|**Minimum**|**Typical**|**Maximum**|**Units**|
|Total Output Power<br>~~GC~~|See Derating<br>~~GC~~|0<br>~~GC~~|~~GC~~|21.6<br>~~GC~~|W<br>~~GC~~|
|Voltage<br>~~GC~~<br>~~PT~~||||||
|Output Voltage Range<br>~~PT~~<br>~~GOO~~|Note 10<br>~~PT~~<br>~~GOO~~|0.7<br>~~PT~~<br>~~GOO~~|~~PT~~<br>~~GOO~~|1.8<br>~~PT~~<br>~~GOO~~|V<br>~~PT~~<br>~~GOO~~|
|Minimum Loading<br>~~GOO~~<br>~~GD~~|~~GOO~~<br>~~GD~~|~~GOO~~<br>~~GD~~|None<br>~~GOO~~<br>~~GD~~|~~GOO~~<br>~~GD~~|~~GOO~~<br>~~GD~~|
|Accuracy (50% load,untrimmed)<br>~~GD~~<br>~~Po~~|Vin = 5.0V,Vout = 1.8V,Cout=660uF,Ta = 25degC<br>~~GD~~<br>~~Po~~|±1<br>~~GD~~<br>~~Po~~|||% of Vout<br>~~GD~~<br>~~Po~~|
|Over Voltage Protection<br>~~Po~~<br>~~PT~~|Note 13<br>~~Po~~<br>~~PT~~|>120%<br>~~Po~~<br>~~PT~~|||% of Vout<br>~~Po~~<br>~~PT~~|
|Under Voltage Protection<br>~~PT~~<br>~~PT~~|~~PT~~<br>~~PT~~|<70%<br>~~PT~~<br>~~PT~~|||% of Vout<br>~~PT~~<br>~~PT~~|
|Current<br>~~PT~~<br>~~a~~<br>~~**G**e~~<br>~~(O~~||||||
|Output Current Range<br>~~PT~~<br>~~a~~|Note 2<br>~~PT~~<br>~~**G**e~~|0<br>~~PT~~<br>~~(O~~|~~PT~~<br>~~(O~~|12<br>~~PT~~|A<br>~~PT~~|
|Current Limit Inception<br>~~a~~<br>~~a~~|After warmup<br>~~**G**e~~|~~(O~~<br>~~D~~|18<br>~~(O~~<br>~~D~~|~~D~~|A<br>~~D~~|
|Short Circuit<br>~~PT~~||||||
|Short Circuit Duration(remove short for recovery)<br>~~PT~~<br>~~GG~~|Output shorted toground,no damage<br>~~PT~~<br>~~GG~~|~~PT~~<br>~~GG~~|Continuous<br>~~PT~~<br>~~GG~~|~~PT~~<br>~~GG~~|~~PT~~<br>~~GG~~|
|Short Circuit Protection Method<br>~~GG~~|Note 5<br>~~GG~~|~~GG~~|Hiccup<br>~~GG~~|~~GG~~|~~GG~~|
|Pre-bias Start-up||Converter will start up if the external output voltage is<br>less than set Vout.|||voltage is|
|Regulation(Note 8)<br>~~PT~~<br>~~(O~~||||||
|Line Regulation<br>~~PT~~<br>~~GO~~|Vin = min. to max.<br>~~PT~~<br>~~GO~~|~~PT~~<br>~~GO~~|~~PT~~<br>~~GO~~<br>~~(O~~|±1.5<br>~~PT~~<br>~~GO~~|% of Vout<br>~~PT~~<br>~~GO~~|
|Load Regulation(Note17)<br>~~GO~~<br>~~GG~~|Iout = min. to max.<br>~~GO~~<br>~~GG~~|~~GO~~<br>~~GG~~|~~GO~~<br>~~(O~~<br>~~GG~~|±1<br>~~GO~~<br>~~GG~~|% of Vout<br>~~GO~~<br>~~GG~~|
|Temperature variation<br>~~DO~~|Ta = -40 to 105degC<br>~~DO~~|~~DO~~|±1.5<br>~~DO~~|~~DO~~|% of Vout<br>~~DO~~|
|Total output voltage variation(Note17)<br>~~DO~~<br>~~GG~~|Fixed input voltage<br>~~DO~~<br>~~GG~~|~~DO~~<br>~~GG~~|~~DO~~<br>~~GG~~|±3.5<br>~~DO~~<br>~~GG~~|% of Vout<br>~~DO~~<br>~~GG~~|
|Ripple and Noise(20MHz bandwidth)<br>~~GG~~<br>~~GG~~|Note 6<br>~~GG~~<br>~~GG~~|~~GG~~<br>~~GG~~|1<br>~~GG~~<br>~~GG~~|~~GG~~<br>~~GG~~|% of Vout<br>~~GG~~<br>~~GG~~|
|External Output Capacitance Range(Note 11)<br>~~DD~~|~~DD~~|660<br>~~DD~~|~~DD~~|5000<br>~~DD~~|uF<br>~~DD~~|



MYMGK1R812 Series A04 Page 5 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

## **Specification Notes** 

(1)Specifications are typical at +25degC, Vin=typical +5.0V(MYMGK1R812FRSR(-H)) or +12.0V.(MYMGK1R812ERSR(-H)), Vout=typical (+1.8V), full load, external caps and natural convection unless otherwise indicated. All models are tested and specified with external 220uF x 3 ceramic output capacitors, 22uF x 2 (for MYMGK1R812ERSR(-H) or FRSR(-H)) or 47uF x 2 (for MYMGK1R812FRSR(-H)) 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. 

(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 Telecordia SR-332 method, +40degC, half output load, natural air convection. 

(4)The On/Off 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 +Vin 

(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)All models are fully operational and meet published specifications, including “cold start” at -40degC. 

(8)Regulation specifications describe the deviation as the line input voltage or output load current is varied from a midpoint value to either extreme. (9)Thermal Protection/Shutdown temperature is measured with the sensor in the converter. 

(10)Do not exceed maximum power specifications when adjusting the output trim. (11)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. 

(12)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. 

(13)The outputs are intended to sink appreciable reverse current. (14)When the temperature decreases below the turn-on threshold, the converter will automatically restart. 

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

(16)The thermal resistance is reference data, and they are measured with our evaluation board as below. 

50.8mm x 60.0mm x 1.6mm (8 Layer, 2oz copper each) FR-4 

(17)Ensured by design. Not production tested. 

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

MYMGK1R812 Series A04 Page 6 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

## **Internal Circuit Diagrams** 

## **ON/OFF internal circuit diagram and using guide** 

**==> picture [469 x 221] intentionally omitted <==**

**----- Start of picture text -----**<br>
Vin<br>Pull UP Resistance<br>MYMGK1R812FRSR(-H) :12kohm( ± 0.5%)<br>ON/OFF MYMGK1R812ERSR(-H) :100kohm( ± 0.5%)<br>C) _<br>To<br>ON/OFF terminal<br>of control IC<br>Pull DOWN Resistance<br>MYMGK1R812FRSR(-H) :10kohm( ± 0.5%)<br>MYMGK1R812ERSR(-H) :33kohm( ± 0.5%)<br>k GND<br>Recommended application<br>**----- End of picture text -----**<br>


## **Power Good(P.G) internal circuit diagram and using guide** 

**==> picture [389 x 214] intentionally omitted <==**

**----- Start of picture text -----**<br>
Vin<br>Regulator<br>-<br>Vout:5V( ± 10%) Vin>5.2V(without Tolerance)<br>Vout:Vin-0.3V to Vin Vin<5.2V<br>Source Current<br>100kohm( ± 5%)<br>0.025mA min.<br>P.G <a<br>mm O<br>P.G<br>Connect to other  Logic Control<br>converter's ON/OFF  Sink Current Circuit<br>terminal etc. 1mA max.<br>f<br>P.G Pull-down FET<br>**----- End of picture text -----**<br>


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

MYMGK1R812 Series A04 Page 7 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

## **PERFORMANCE DATA AND OSCILLOGRAMS OF MYMGK1R812FRSR/MYMGK1R812FRSR-H** 

Efficiency vs. Line Voltage and Load Current @ +25degC. (Vout = 0.7V) Efficiency 95 , 1 t T T 70 | a GE EE 65 : : : 0 2 4 6 8 10 12 Output current Iout [A] 

On/Off Enable Delay (Vin=5.0V, Vout=0.7V, Iout=12A, Cload=660uF) Trace1=ON/OFF 2V/div, Trace2=Vout 200mV/div, Trace3=PWGOOD 5V/div, 1ms/div 

**==> picture [64 x 113] intentionally omitted <==**

**----- Start of picture text -----**<br>
ON/OFF 2V/div<br>Vout 200mV/div<br>PWGOOD 5V/div<br>1ms/div<br>**----- End of picture text -----**<br>


Step Load Transient Response (Vin=5.0V, Vout=0.7V, Cload=660uF, Iout=6A to 12A 1.2A/us) Trace 2=Vout(AC) 50mV/div, Trace 4=Iout 5A/div, 20us/div 

**==> picture [173 x 175] intentionally omitted <==**

**----- Start of picture text -----**<br>
Vout vs. Line Voltage and Load Current @ +25degC. (Vout = 0.7V)<br>Load regulation<br>0.721 ; -<br>0.686 |<br>0.679 : : : : :<br>0 2 4 6 8 10 12<br>Output current Iout [A]<br>Output voltage Vout [V]<br>**----- End of picture text -----**<br>


Output Ripple and Noise (Vin=5.0V, Vout=0.7V, Iout=12A, Cload=660uF, Scope BW=20MHz, 5mV/div, 1us/div) 

**==> picture [66 x 43] intentionally omitted <==**

**----- Start of picture text -----**<br>
Vout(AC) 5mV/div<br>1us/div<br>**----- End of picture text -----**<br>


Step Load Transient Response (Vin=5.0V, Vout=0.7V, Cload=660uF, Iout=12 to 6A 1.2A/us) Trace 2=Vout(AC) 50mV/div, Trace 4=Iout 5A/div, 20us/div 

**==> picture [384 x 107] intentionally omitted <==**

**----- Start of picture text -----**<br>
:Ch3 Scale i<br>ΔV=18mV ΔV=16mV<br>Vout(AC) 50mV/div<br>Vout(AC) 50mV/div<br>f Iout 5A/div A \<br>Iout 5A/div<br>} =<br>20us/div 20us/div<br>**----- End of picture text -----**<br>


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

MYMGK1R812 Series A04 Page 8 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

## **PERFORMANCE DATA AND OSCILLOGRAMS OF MYMGK1R812FRSR/MYMGK1R812FRSR-H** 

**==> picture [185 x 173] intentionally omitted <==**

**----- Start of picture text -----**<br>
Efficiency vs. Line Voltage and Load Current @ +25degC. (Vout = 1.0V)<br>95 , , ,<br>= 99 : oe<br>65 | i i | i |<br>0 2 4 6 8 10 12<br>Output current Iout [A]<br>**----- End of picture text -----**<br>


**==> picture [173 x 171] intentionally omitted <==**

**----- Start of picture text -----**<br>
Vout vs. Line Voltage and Load Current @ +25degC. (Vout = 1.0V)<br>Load regulation<br>1.030 7 7<br>1.000 i a an<br>0.970 i | i i !<br>0 2 4 6 8 10 12<br>Output current Iout [A]<br>Output voltage Vout [V]<br>**----- End of picture text -----**<br>


On/Off Enable Delay (Vin=5.0V, Vout=1.0V, Iout=12A, Cload=660uF) Trace1=ON/OFF 2V/div, Trace2=Vout 500mV/div, Trace3=PWGOOD 5V/div, 1ms/div 

Output Ripple and Noise (Vin=5.0V, Vout=1.0V, Iout=12A, Cload=660uF, Scope BW=20MHz, 5mV/div, 1us/div) 

**==> picture [384 x 311] intentionally omitted <==**

**----- Start of picture text -----**<br>
t ON/OFF 2V/div Chi Scale }<br>1<br>Vout 500mV/div<br>Vout(AC) 5mV/div<br>PWGOOD 5V/div<br>|{<br>1ms/div 1us/div<br>Che S00mi¥ MAChi1.0rns¢25.0MS/s172v 40. Onsipt Ch3 SOmy + Sw MACh31.0ps 75.0GS-800yv IT 20.0psq<br>Cload=660uF, Step Load Transient Response (Vin=5.0V, Vout=1.0V, Cload=660uF,<br>Iout=6A to 12A, 1.2A/us) Trace 2=Vout(AC), 50mV/div, Trace 4=Iout, 5A/div, 20us/div Iout=12 to 6A, 1.2A/us)<br>Sample 107 Acgs . Ciera) Tek Run Sample 3? Aegs<br>f Ch3 Position<br>t Ch Scale<br>ΔV=16mV<br>ΔV=18mV Vout(AC) 50mV/div<br>Vout(AC) 50mV/div<br>t é !<br>Iout 5A/div<br>Iout 5A/div<br>rs<br>20us/div 20us/div<br>**----- End of picture text -----**<br>


Step Load Transient Response (Vin=5.0V, Vout=1.0V, Cload=660uF, Iout=6A to 12A, 1.2A/us) Trace 2=Vout(AC), 50mV/div, Trace 4=Iout, 5A/div, 20us/div 

Step Load Transient Response (Vin=5.0V, Vout=1.0V, Cload=660uF, Iout=12 to 6A, 1.2A/us) Trace 2=Vout(AC), 50mV/div, Trace 4=Iout, 5A/div, 20us/div 

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

MYMGK1R812 Series A04 Page 9 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

## **PERFORMANCE DATA AND OSCILLOGRAMS OF MYMGK1R812FRSR/MYMGK1R812FRSR-H** 

**==> picture [420 x 366] intentionally omitted <==**

**----- Start of picture text -----**<br>
Efficiency vs. Line Voltage and Load Current @ +25degC. (Vout = 1.8V) Vout vs. Line Voltage and Load Current @ +25degC. (Vout = 1.8V)<br>Load regulation<br>95 1.854 T T T T T<br>i i i i i H i i i<br>70 aoe —Vin=4.5V 1764 | p o<br>65 ; 1746 ;<br>0 2 4 6 8 10 12 0 2 4 6 8 10 12<br>Output current Iout [A] Output current Iout [A]<br>On/Off Enable Delay (Vin=5.0V, Vout=1.8V, Iout=12A, Cload=660uF) Output Ripple and Noise<br>Trace1=ON/OFF 2V/div, Trace2=Vout 500mV/div, Trace3=PWGOOD 5V/div, 1ms/div (Vin=5.0V, Vout=1.8V, Iout=12A, Cload=660uF, Scope BW=20MHz, 5mV/div, 1us/div)<br>Tek Stopped a 2 Acgs _ _ _ Ciera) Tek Run Sample 84 Megs . .<br>: Ch1 Position :<br>a t<br>t ON/OFF 2V/div Chi Scale T<br>Vout 500mV/div<br>Vout(AC) 5mV/div<br>PWGOOD 5V/div<br>1ms/div 1us/div<br>Output voltage Vout [V]<br>**----- End of picture text -----**<br>


Output Ripple and Noise (Vin=5.0V, Vout=1.8V, Iout=12A, Cload=660uF, Scope BW=20MHz, 5mV/div, 1us/div) 

Step Load Transient Response (Vin=5.0V, Vout=1.8V, Cload=660uF, Iout=6A to 12A, 1.2A/us) Trace 2=Vout(AC), 50mV/div, Trace 4=Iout, 5A/div, 20us/div 

Step Load Transient Response (Vin=5.0V, Vout=1.8V, Cload=660uF, Iout=12 to 6A, 1.2A/us) Trace 2=Vout(AC), 50mV/div, Trace 4=Iout, 5A/div, 20us/div 

**==> picture [388 x 112] intentionally omitted <==**

**----- Start of picture text -----**<br>
:Ch3 Scale T<br>ΔV=18mV ΔV=16mV<br>Vout(AC) 50mV/div<br>Vout(AC) 50mV/div<br>t 4<br>Iout 5A/div<br>Iout 5A/div<br>20us/div 20us/div<br>**----- End of picture text -----**<br>


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

MYMGK1R812 Series A04 Page 10 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

## **PERFORMANCE DATA AND OSCILLOGRAMS OF MYMGK1R812ERSR/MYMGK1R812ERSR-H** 

Efficiency vs. Line Voltage and Load Current @ +25degC. (Vout = 0.7V) Efficiency 95 Oe eea SS =S i j —_ = 80 4-4 a an ae 215 |——f44-4-4 7088 |— | ai i i rri i 0 2 4 6— 8 10 12 Output current Iout [A] 

On/Off Enable Delay (Vin=12.0V, Vout=0.7V, Iout=12A, Cload=660uF) Trace1=ON/OFF 2V/div, Trace2=Vout 200mV/div, Trace3=PWGOOD 5V/div, 1ms/div 

Vout vs. Line Voltage and Load Current @ +25degC. (Vout = 0.7V) 

**==> picture [130 x 107] intentionally omitted <==**

**----- Start of picture text -----**<br>
0707 | el<br>|| || |<br>0.700 es a a<br>0.693 a<br>0.686 |i eei i i<br>0.679 0 2 4 6 8<br>Output current Iout [A]<br>Output voltage Vout [V]<br>**----- End of picture text -----**<br>


Output Ripple and Noise (Vin=12.0V, Vout=0.7V, Iout=12A, Cload=660uF, Scope BW=20MHz, 5mV/div, 1us/div) 

**==> picture [300 x 120] intentionally omitted <==**

**----- Start of picture text -----**<br>
ON/OFF 2V/div a| t<br>Vout 200mV/div<br>PWGOOD 5V/div Vout(AC) 5mV/div<br>1ms/div 1us/div<br>**----- End of picture text -----**<br>


Step Load Transient Response (Vin=12.0V, Vout=0.7V, Cload=660uF, Iout=6A to 12A 1.2A/us) Trace 2=Vout(AC) 50mV/div, Trace 4=Iout 5A/div, 20us/div 

Step Load Transient Response (Vin=12.0V, Vout=0.7V, Cload=660uF, Iout=12 to 6A 1.2A/us) Trace 2=Vout(AC) 50mV/div, Trace 4=Iout 5A/div, 20us/div 

**==> picture [388 x 106] intentionally omitted <==**

**----- Start of picture text -----**<br>
ΔV=20mV<br>ΔV=21mV - Vout(AC) 50mV/div ji<br>34<br>Vout(AC) 50mV/div<br>Iout 5A/div 4<br>Iout 5A/div<br>t f<br>20us/div 20us/div<br>**----- End of picture text -----**<br>


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

MYMGK1R812 Series A04 Page 11 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

**==> picture [412 x 180] intentionally omitted <==**

**----- Start of picture text -----**<br>
PERFORMANCE DATA AND OSCILLOGRAMS OF MYMGK1R812ERSR/MYMGK1R812ERSR-H<br>Efficiency vs. Line Voltage and Load Current @ +25degC. (Vout = 1.0V) Vout vs. Line Voltage and Load Current @ +25degC. (Vout = 1.0V)<br>Load regulation<br>95 ] T ] T T 1.030 T T T 7<br>CS eeee — Vin=8V 1.020 ne ne a<br>| i i i i i<br>85 ae 1.010 a ns a es<br>i | i | | i i<br>2m fa te 0.990 pm<br>= i | | i i i i i H i<br>65 || H H H H H 0.970 i H H i H<br>0 2 4 6 8 10 12 0 2 4 6 8 10 12<br>Output current Iout [A] Output current Iout [A]<br>Output voltage Vout [V]<br>**----- End of picture text -----**<br>


On/Off Enable Delay (Vin=12.0V, Vout=1.0V, Iout=12A, Cload=660uF) Trace1=ON/OFF 2V/div, Trace2=Vout 500mV/div, Trace3=PWGOOD 5V/div, 1ms/div 

Output Ripple and Noise (Vin=12.0V, Vout=1.0V, Iout=12A, Cload=660uF, Scope BW=20MHz, 5mV/div, 1us/div) 

**==> picture [299 x 123] intentionally omitted <==**

**----- Start of picture text -----**<br>
ON/OFF 2V/div<br>a<br>Vout 500mV/div<br>PWGOOD 5V/div Vout(AC) 5mV/div<br>t<br>1ms/div 1us/div<br>**----- End of picture text -----**<br>


Step Load Transient Response (Vin=12.0V, Vout=1.0V, Cload=660uF, Iout=6A to 12A, 1.2A/us) Trace 2=Vout(AC), 50mV/div, Trace 4=Iout, 5A/div, 20us/div 

Step Load Transient Response (Vin=12.0V, Vout=1.0V, Cload=660uF, Iout=12A to 6A, 1.2A/us)Trace 2=Vout(AC), 50mV/div, Trace 4=Iout, 5A/div, 20us/div 

**==> picture [423 x 102] intentionally omitted <==**

**----- Start of picture text -----**<br>
t ΔV=20mV<br>ΔV=22mV<br>Vout(AC) 50mV/div<br>Vout(AC) 50mV/div<br>Iout 5A/div<br>Iout 5A/div<br>=t<br>20us/div 20us/div<br>**----- End of picture text -----**<br>


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

MYMGK1R812 Series A04 Page 12 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

## **PERFORMANCE DATA AND OSCILLOGRAMS OF MYMGK1R812ERSR/MYMGK1R812ERSR-H** 

Efficiency vs. Line Voltage and Load Current @ +25degC. (Vout = 1.8V) 

**==> picture [66 x 8] intentionally omitted <==**

**----- Start of picture text -----**<br>
Output current Iout [A]<br>**----- End of picture text -----**<br>


On/Off Enable Delay (Vin=12.0V, Vout=1.8V, Iout=12A, Cload=660uF) Trace1=ON/OFF 2V/div, Trace2=Vout 500mV/div, Trace3=PWGOOD 5V/div, 1ms/div 

Vout vs. Line Voltage and Load Current @ +25degC. (Vout = 1.8V) 

**==> picture [130 x 100] intentionally omitted <==**

**----- Start of picture text -----**<br>
| i | |<br>1746 i i i i<br>0 2 4 6 8<br>Output current Iout [A]<br>Output voltage Vout [V]<br>**----- End of picture text -----**<br>


Output Ripple and Noise (Vin=12.0V, Vout=1.8V, Iout=12A, Cload=660uF, Scope BW=20MHz, 5mV/div, 1us/div) 

**==> picture [300 x 115] intentionally omitted <==**

**----- Start of picture text -----**<br>
ON/OFF 2V/div 4 Co) E t<br>:<br>| f<br>Vout 500mV/div<br>PWGOOD 5V/div Vout(AC) 5mV/div<br>1ms/div 1us/div<br>**----- End of picture text -----**<br>


Step Load Transient Response (Vin=12.0V, Vout=1.8V, Cload=660uF, Iout=6A to 12A, 1.2A/us) Trace 2=Vout(AC), 50mV/div, Trace 4=Iout, 5A/div, 20us/div 

Step Load Transient Response (Vin=12.0V, Vout=1.8V, Cload=660uF, Iout=12 to 6A, 1.2A/us) Trace 2=Vout(AC), 50mV/div, Trace 4=Iout, 5A/div, 20us/div 

**==> picture [389 x 103] intentionally omitted <==**

**----- Start of picture text -----**<br>
ΔV=22mV t ΔV=20mV<br>Vout(AC) 50mV/div<br>Vout(AC) 50mV/div<br>Iout 5A/div « «<br>Iout 5A/div<br>= t<br>20us/div 20us/div<br>**----- End of picture text -----**<br>


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

MYMGK1R812 Series A04 Page 13 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

## **THERMAL DERATINGS OF MYMGK1R812FRSR & MYMGK1R812ERSR** 

## **MYMGK1R812FRSR** 

## **MYMGK1R812ERSR** 

Maximum Current Temperature Derating at Sea Level 

Maximum Current Temperature Derating at Sea Level 

**==> picture [410 x 58] intentionally omitted <==**

**----- Start of picture text -----**<br>
8;|<br>Output current Iout [A] Output current Iout [A]<br>**----- End of picture text -----**<br>


**==> picture [7 x 58] intentionally omitted <==**

**----- Start of picture text -----**<br>
Output current Iout [A]<br>**----- End of picture text -----**<br>


Temperature Measuring Area 

**==> picture [35 x 19] intentionally omitted <==**

**----- Start of picture text -----**<br>
CM<br>1R812FRS<br>**----- End of picture text -----**<br>


Temperature Measuring Area (Reference) Position : Center of the module Radius : 1mm 

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 temperature of the product : 110degC max 

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

MYMGK1R812 Series A04 Page 14 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

## **THERMAL DERATINGS OF MYMGK1R812FRSR-H & MYMGK1R812ERSR-H** 

## **MYMGK1R812FRSR-H** 

**==> picture [139 x 212] intentionally omitted <==**

**----- Start of picture text -----**<br>
Maximum Current Temperature Derating at Sea Level<br>MYMGK1R812FRSR-H Safe<br>Vin=5V<br>se<br>12vo __ | | T<br>JE<br>4<br>(i0<br>30 40 50 60 70<br>Ambient Temperature Ta<br>Temperature Measuring Area<br>Output current Iout [A]<br>**----- End of picture text -----**<br>


**==> picture [33 x 21] intentionally omitted <==**

**----- Start of picture text -----**<br>
1R812<br>FRSR-H<br>**----- End of picture text -----**<br>


## **MYMGK1R812ERSR-H** 

Maximum Current Temperature Derating at Sea Level MYMGK1R812ERSR-H Safe Vin=12.0V Vout=0.7-1.8V ; 12ao | | | | a 4 0 30 40 50 60 70 Ambient Temperature Ta Temperature Measuring Area (Reference) Position : Center of the module Radius : 1mm 

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 temperature of the product : 110degC max 

## **TRANSIENT RESPONSE DATAS OF MYMGK1R812FRSR & MYMGK1R812ERSR & MYMGK1R812FRSR-H & MYMGK1R812ERSR-H** 

Transient response data at various conditions are showed in following table. Minimum output capacitance can serve less than 3% x Vout of deviation for 10A load change(1.2A/us). 

|Vout(V)|Vin(V)|Cout(uF)|Voltage Deviation(mV)|
|---|---|---|---|
||||6-12A Load Step (1.2A/us)|
|0.7|5|660|18|
||12||21|
|1|5||18|
||12||22|
|1.2|5||18|
||12||22|
|1.8|5||18|
||12||22|



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

MYMGK1R812 Series A04 Page 15 of 24 

**MYMGK1R812 Series** 

MonoBK[TM] , 12A DC-DC Converter 

## ~~ee~~ **MECHANICAL SPECIFICATIONS** 

## **Dimension and Pin Assignment** 

**==> picture [438 x 335] intentionally omitted <==**

**----- Start of picture text -----**<br>
< Top View > < Side View > < Bottom View ><br>0.3 0.3<br>1.1 0.85 1.2 1.2 1.2 0.85 1.1<br>0.45<br>25 24 23 3 2 1 0.9<br>: - 4 ns 3 § 0.3<br>28 27 26 6 5 4 0.9<br>0.9<br>1.0 22 31 30 29 7 1.1<br>0.3<br>1.0 TAQ 32 Se 33 LX 34 1.4 10.5<br>0.3<br>1.0 21 37 36 35 8 1.1<br>0.9<br>17 16 15 11 10 9 0.9<br>0.3<br>20 19 18 14 13 12 0.9<br>N a<br>0.45<br>0.45 1.0 1.0 1.0 0.9 1.0 1.0 1.0 0.45<br>0.3 0.3 0.3 0.3<br>9.0<br>Unit: mm<br>Tolerances<br>±  0.15mm<br>9.0<br>10.5<br>5.6max.<br>**----- End of picture text -----**<br>


|**INPUT/OUTPUT CONNECTIONS**|**INPUT/OUTPUT CONNECTIONS**|
|---|---|
|**Pin No.**|**Function**|
|**1 - 6**|**Vin**|
|**7**|**PowerGood**|
|**8**|**ON/OFF**|
|**9 - 14**|**GND**|
|**15 - 20**|**Vout**|
|**21**|**Sense**|
|**22**|**Trim**|
|**23 - 28**|**GND**|
|**29 - 37**|**GND(Thermal Pad)**|



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

MYMGK1R812 Series A04 Page 16 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

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

**==> picture [436 x 296] intentionally omitted <==**

**----- Start of picture text -----**<br>
0.2 0.2<br>1.2 0.75 1.3 1.3 1.3 0.75 1.2<br>— t t Hi tt tt Hi i t 0.4<br>1 2 3 23 24 25 1.0<br>0.2<br>3.4<br>4 5 6 26 27 28 1.0<br>0.75 0.8<br>-----<br>0.55<br>1.1 7 29 30 31 22 1.2<br>0.2<br>1.1 34 33 32 1.3<br>0.2 _v<br>1.1 8 35 36 37 21 1.2<br>0.8<br>9 10 11 15 16 17 1.0<br>3.4<br>0.2<br>12 13 14 18 19 20 1.0<br>;<br>_| 0.4<br>0.4 1.1 1.1 1.1 0.8 1.1 1.1 1.1 0.4<br>Unit: mm<br>0.2 0.2 0.2 0.2<br>**----- End of picture text -----**<br>


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

**Picture 20.9x11.0(mm)** 

**==> picture [37 x 8] intentionally omitted <==**

**----- Start of picture text -----**<br>
TOP VIEW<br>**----- End of picture text -----**<br>


**==> picture [53 x 25] intentionally omitted <==**

**----- Start of picture text -----**<br>
BOTTOM VIEW ms @&|<br>**----- End of picture text -----**<br>


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

MYMGK1R812 Series A04 Page 17 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

## **Application Circuit & BOM list (Evaluation Board)** 

**==> picture [457 x 444] intentionally omitted <==**

**----- Start of picture text -----**<br>
|||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Sense|
|Vout-Sense|Vout-Sense|
|Vin|Vout|
|R1|
|Vout|Vout|
|Sense|
|+|+|+|+|+|
|ON/OFF|R2|
|“T|T.|C11|C12|C1|C2|Trim|NUTTIN|C3|C4|C5|C6|C13|C14|C15|C16|C23|C24|C25|C26|
|PowerGood|
|R11|
|C7|
|GND|GND|
|GND|R12|
|O-——|GND|(Thermal Pad)|GND|SAUNA|
|GND-Sense|GND-Sense|
|ON/OFF|PWGOOD|
|MYMGK1R812FRSR|MYMGK1R812FRSR|MYMGK1R812ERSR|
|MYMGK1R812FRSR-H|MYMGK1R812FRSR-H|MYMGK1R812ERSR-H|
|*|4.5≤Vin(V)≤5.5|*|5.5≤Vin(V)≤8.0|
|C1, C2|47uF/10V|22uF/25V|22uF/25V|
|GRM32ER71A476KE15|GRM32ER71E226KE15|GRM32ER71E226KE15|
|(Murata)|(Murata)|(Murata)|
|C3, C4, C5|220uF/4V|220uF/4V|220uF/4V|
|GRM32EC80G227ME05|GRM32EC80G227ME05|GRM32EC80G227ME05|
|(Murata)|(Murata)|(Murata)|
|R1|1005, Chip resister, 0 ohm|1005, 0 ohm|1005, 0 ohm|
|R11, R12|1005, Chip resister|1005, Chip resister|1005, Chip resister|
|C6, C7, C13,|No mount|No mount|No mount|
|C14, C15, C16,|
|C23, C24, C25,|
|C26, R2|

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


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

Specifications are subject to change without notice. 

MYMGK1R812 Series A04 Page 18 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

## **TAPE AND REEL INFORMATION** 

## **Tape Dimension** 

**==> picture [57 x 44] intentionally omitted <==**

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


## **Reel Dimension** 

**==> picture [333 x 236] intentionally omitted <==**

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


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

MYMGK1R812 Series A04 Page 19 of 24 

## **MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

## ~~—“‘i‘isSs—s~~ **TAPE SPECIFICATIONS** 

**==> picture [191 x 130] intentionally omitted <==**

**----- Start of picture text -----**<br>
Empty portion<br>(200mm  MIN)<br>"Module on  tape" portion<br>Indication<br>**----- End of picture text -----**<br>


**==> picture [109 x 17] intentionally omitted <==**

**----- Start of picture text -----**<br>
Empty portion Leader portion<br>(180mm  MIN) (200mm  MIN)<br>**----- End of picture text -----**<br>


**==> picture [31 x 6] intentionally omitted <==**

**----- Start of picture text -----**<br>
Circle Hole<br>**----- End of picture text -----**<br>


**==> picture [237 x 66] intentionally omitted <==**

**----- Start of picture text -----**<br>
No.1 Pin<br>M M Pulling Direction<br>EI E)-<br>**----- End of picture text -----**<br>


## **Note** 

1. The adhesive strength of the protective tape must be within 0.1-1.3N. 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. 

|**Part Number**|**Qty(pcs)**|
|---|---|
|MYMGK1R812FRSR|**Qty(pcs)**<br>400|
|MYMGK1R812ERSR|400|
|MYMGK1R812FRSRD|100|
|MYMGK1R812ERSRD|100|
|MYMGK1R812FRSR-H|400|
|MYMGK1R812ERSR-H|400|
|MYMGK1R812FRSR-HD|100|
|MYMGK1R812ERSR-HD|100|



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

MYMGK1R812 Series A04 Page 20 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

## **TECHNICAL NOTES** 

## **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. 

## **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 UnderVoltage 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 on/off 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. These converters include a soft start circuit to moderate the duty cycle of its PWM controller at power up, thereby limiting the input inrush current. The On/Off 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. 

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 22 uF x 2 or 47uF 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 220 uF 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. 

## **Output Noise** 

All models in this converter series are 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. 

## **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. 

C1=220uF x 3 CERAMIC C2=OPEN Figure ：Measuring Output Ripple and Noise 

## **Minimum Output Loading Requirements** 

All models regulate within specification and are stable under no load to full load conditions. Operation under no load might however 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’s to rise above the Operating Temperature Range up to the shutdown temperature, an on-board electronic temperature sensor will power down the unit. When the temperature decreases below the turn-on threshold, the converter will automatically restart. 

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

MYMGK1R812 Series A04 Page 21 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

**CAUTION:** If you operate too close to the thermal limits, the converter may shut down suddenly without warning. Check your application to avoid unplanned thermal shutdown. 

## **Temperature Derating Curves** 

The graphs in this data sheet illustrate typical operation under a variety of conditions. The derating curves show limit of the output current with increasing the continuous ambient 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 fanforced airflow. Murata makes Characterization measurements in a closed cycle wind tunnel with calibrated airflow. We use both thermocouples and an infrared camera system to observe thermal performance. 

**CAUTION:** These graphs are all collected at slightly above Sea Level altitude. Be sure to reduce the derating for lower density atmosphere. 

## **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. 

## **Output Voltage Remote Sense** 

This function is capable to compensate up the voltage drop between the output and input of load. The voltage of the Vout pin must NOT be over their allowed maximum voltage if using the remote sense. The sense trace should be connected to Vout line as shortly as possible. The sense trace should be shielded by GND line or something else to reduce noise pick up. The sense line length is recommended within 10cm for output voltage stability. If the remote sense is not needed, the Sense pin should be connected to the Vout pin directly. 

## **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 latches OFF. The converter restarts after a hiccup delay (about 16 ms ). 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. 

## **Remote On/Off Control** 

Please refer to the Connection Diagram on page 1 for On/Off connections. 

Positive logic models are enabled when the On/Off pin is left open or is pulled high to Vin with respect to GND. An internal bias current causes the OVP open pin to rise to Vin. Positive-polarity devices are disabled when the On/Off is grounded or brought to within a low voltage (see Specifications) with respect to GND. 

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. 

## **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. 

## **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. MYMGK1R812 series can be reflowed once. MYMGK1R812-H series can be reflowed twice. 

|**Reflow Solder Operations for Surface-mount products**|**Reflow Solder Operations for Surface-mount products**|
|---|---|
|**For Sn/Ag/Cu based solders:**||
|**Preheat Temperature**|**Less than 1degC per second**|
|**Time over Liquidus**|**45 to 75 seconds**|
|**Maximum Peak Temperature**|**MYMGK1R812 series:250degC**|
||**MYMGK1R812-H series:260degC**|
|**Cooling Rate**|**Less than 3degC per second**|
|**For Sn/Pb based solders:**||
|**Preheat Temperature**|**Less than 1degC per second**|
|**Time over Liquidus**|**60 to 75 seconds**|
|**Maximum Peak Temperature**|**235degC**|
|**Cooling Rate**|**Less than 3degC per second**|



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

MYMGK1R812 Series A04 Page 22 of 24 

**MYMGK1R812 Series** 

MonoBK[TM] , 12A DC-DC Converter 

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

**==> picture [160 x 184] intentionally omitted <==**

**----- Start of picture text -----**<br>
MYMGK1R812 series:235~250 degC<br>MYMGK1R812-H series:235~260degC<br>217degC200 degC =iN<br>scodesesg JE<br>Reflow<br>Zone<br>>217degC<br>Preheat/Soak Zone 45-~75sec<br>150~200degC UP:<1.5degCisec<br>50 DOWN:<3degC/sec<br>120 sec max<br><1degC/sec<br>0<br>0 30 60 90 120 150 180 210 240<br>Time(sec)<br>CAUTION: Do not reflow the converter as follows,<br>because the converter may fall from the substrate<br>during reflowing.<br>**----- End of picture text -----**<br>


||||**Estimated Rtrim(kohm)**|**Estimated Rtrim(kohm)**|
|---|---|---|---|---|
|**Output Voltage**|||**MYMGK1R812FRSR**<br>**MYMGK1R812FRSR-H**|**MYMGK1R812ERSR**<br>**MYMGK1R812ERSR-H**|
|0.7V|||75+0.36|68+2.4|
|1.0V|||16+0.39|16|
|1.2V|||10+0.75|10+0.62|
|1.5V|||6.8+0.33|6.8+0.24|
|1.8V|||5.1+0.27|5.1+0.2|



## **Resistor Trim Equation** 

MYMGK1R812FRSR/MYMGK1R812FRSR-H 

10 x A 

> Rtrim(kohm) = ~~_~~ (Vout - A) 

**==> picture [104 x 9] intentionally omitted <==**

MYMGK1R812ERSR/MYMGK1R812ERSR-H 

10 x A Rtrim(kohm) = (Vout - A) A = 0.612 + 0.01 x ( Vout - 0.6 ) 

## **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 260degC 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. 

Output voltage depends on the value of capacitance of Cout in this product , the smaller Cout may cause the higher output voltage. The equations above are only reference, so please check output voltage and adjust Rtrim in user circumstances. To increase(decrease) output voltage is obtained by decreasing(increasing) value of Rtrim . 

## **Power Good(P.G)** 

These products has power-good output that indicates high when switcher output is within the target. The power-good function is activated after soft-start has finished. If the output voltage becomes within +10% and –5% of the target value, internal comparators detect power-good state and the power-good signal becomes high after a 1-ms internal delay. If the output voltage goes outside of +15% or –10% of the target value, the power-good signal becomes low after two microsecond (2-μs) internal delay. The power-good output is an open drain output and must be pulled up internally. 

## **Output Voltage Adjustment** 

The output voltage may be adjusted over a limited range by connecting 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. or better. Mount the resistor close to the converter with very short leads or use a surface mount trim resistor. In the table below, the estimated resistance is given at limited condition ;Vin:typ.,Ta:25degC,Iout:max.,Cout:660uF. (Please look at Test Circuit which is shown below). Do not exceed the specified limits of the output voltage or the converter’s maximum power rating when applying these resistors. Also, avoid high noise at the Trim input. However, to prevent instability, you should never connect any capacitors between Trim pin and GND pin. 

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

MYMGK1R812 Series A04 Page 23 of 24 

**MYMGK1R812 Series** 

## MonoBK[TM] , 12A DC-DC Converter 

## **APPENDIX** 

**==> picture [438 x 116] intentionally omitted <==**

**----- Start of picture text -----**<br>
Test Circuit<br>Vin Vout<br>Sense<br>ON/OFF<br>Vin Trim C3 C4 C5<br>+ Power Good<br>GND  Rtrim RL<br>C1 C2<br>C7<br>(*2)<br>(*1)<br>**----- End of picture text -----**<br>


*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. 

This would typically be aluminum electrolytic type and does not need to be close to the input terminals of 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. 

||**MYMGK1R812FRSR**<br>**MYMGK1R812FRSR-H**<br>***4.5≤Vin(V)≤5.5**|**MYMGK1R812FRSR**<br>**MYMGK1R812FRSR-H**<br>***5.5≤Vin(V)≤8.0**|**MYMGK1R812ERSR**<br>**MYMGK1R812ERSR-H**|
|---|---|---|---|
|C1, C2|47uF/10V<br>GRM32ER71A476KE15<br>(Murata)|22uF/25V<br>GRM32ER71E226KE15<br>(Murata)|22uF/25V<br>GRM32ER71E226KE15<br>(Murata)|
|C3, C4, C5|220uF/4V<br>GRM32EC80G227ME05<br>(Murata)|220uF/4V<br>GRM32EC80G227ME05<br>(Murata)|220uF/4V<br>GRM32EC80G227ME05<br>(Murata)|
|Rtrim|1005, Chip resister|1005, Chip resister|1005, Chip resister|
|C7|No mount or<br>Electrolytic Capacitor<br>(if necessary)|No mount or<br>Electrolytic Capacitor<br>(if necessary)|No mount or<br>Electrolytic Capacitor<br>(if necessary)|



**==> picture [10 x 20] intentionally omitted <==**

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


This product is subject to the following operating requirements and the Life and Safety Critical Application Sales Policy: Refer to: https://power.murata.com/en/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. Spec and cautions are subject to change without notice. © 2019 Murata Manufacturing Co., Ltd 

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

Specifications are subject to change without notice. 

MYMGK1R812 Series A04 Page 24 of 24