YEV09T06-0G

Bel Power Solutions point-of-load converters are recommended for use with regulated bus converters in an Intermediate Bus Architecture (IBA).  The YEV09T06, non-isolated DC-DC point of load (POL) converter, delivers up to 6A of output current in an industry-standard single-in-line (SIP) through-hole package.  The YEV09T06 POL converter is an ideal choice for Intermediate Bus Architectures where point of load conversion is a requirement. 

- RoHS lead free and lead-solder-exempt products are available 

- Wide operating temperature range: 0 to 70 ºC; 

- optional to a range of -40 to 85 ºC 

- High efficiency synchronous buck topology 

Operating from a 4.5-13.8V input the POL converter provides an extremely tightly regulated programmable output voltage of 0.59V to 5.1V.  The POL converter offers exceptional thermal performance, even in high temperature environments with minimal airflow.  This performance is accomplished through the use of advanced circuit solutions, packaging and processing techniques. The resulting design possesses ultra-high efficiency, excellent thermal management, and a slim body profile that minimizes impedance to system airflow, thus enhancing cooling for both upstream and downstream devices.  The use of automation for assembly, coupled with advanced power electronics and thermal design, results in a product with extremely high reliability. 

- Low noise fixed frequency operation 

- Wide input voltage range: 4.5V–13.8V 

- High continuous output current: 6A 

- Programmable output voltage range: 0.59V–5.1V 

- • Overcurrent, and output overvoltage protections with automatic restart 

- Enable input 

- Start up into prebiased load 

- No minimum load requirements 

   - Low voltage, high density systems with Intermediate Bus Architectures (IBA) 

   - Point-of-load regulators for high performance DSP, FPGA, ASIC, and microprocessors 

   - Desktops, servers, and portable computing 

   - Broadband, networking, optical, and communications systems 

- High MTBF of 67 million hours 

- Industry standard size through-hole single-in-line package and pinout: 0.41 x 0.65 x 0.40 inches (10.4 x 16.51 x 10.16 mm) 

- UL94 V-0 flammability rating 

- Safety approved to UL/CSA 62368-1 and EN/IEC 62368-1 

- One part that covers many applications 

- Reduces board space, system cost and complexity, and time to market 

## **1. ABSOLUTE MAXIMUM RATINGS** 

Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely affect long-term reliability, and cause permanent damage to the converter. 

|**PARAMETER**|**CONDITIONS / DESCRIPTION**|**MIN**|**MAX**|**UNITS**|
|---|---|---|---|---|
|Input Voltage|Continuous|-0.3|15|VDC|
|Ambient Temperature Range|Operating|0|70|C|
|Storage Temperature (Ts)||-55|125|C|
|Case Temperature (Tc)|Measured on the inductor L100||125|C|



## **2. ENVIRONMENTAL AND MECHANICAL SPECIFICATIONS** 

|**PARAMETER**|**CONDITIONS / DESCRIPTION**|**MIN**|**NOM**|**MAX**|**UNITS**|
|---|---|---|---|---|---|
|Weight||||2.5|grams|
|MTBF|Calculated Per Telcordia Technologies SR-332, Method I<br>Case 1, 50% electrical stress, 40°C ambient temperature|67|||MHrs|
|Lead Plating|YEV09T06-0 and YEV09T06-0G||100% Matte Tin|100% Matte Tin||



## **3. ELECTRICAL SPECIFICATIONS** 

Specifications apply at the input voltage from 4.5V to 13.8V, output load from 0 to 6A, output voltage from 0.59V to 5.1V, 22µF external output capacitor, and ambient temperature from 0°C to 70°C unless otherwise noted. 

## **3.1 INPUT SPECIFICATIONS** 

|**PARAMETER**|**CONDITIONS / DESCRIPTION**|**MIN**|**NOM**|**MAX**|**UNITS**|
|---|---|---|---|---|---|
|Input voltage (VIN)|0.59 V≤VOUT ≤3.63 V<br>3.64 V≤VOUT ≤5.1 V|4.5<br>6.5|12<br>12|13.8<br>13.8|VDC|
|Undervoltage Lockout Turn On Threshold|Input Voltage Ramping Up|4.1|4.3|4.5|VDC|
|Undervoltage Lockout Turn Off Threshold|Input Voltage Ramping Down|3.9|4.1|4.3|VDC|
|Standby Input Current|VIN= 12 V, POL is disabled via ON/OFF||20||mADC|
|Input Reflected Ripple Current<br>Peak-to-Peak|BW = 5 MHz to 20 MHz, LSOURCE= 1 µH,<br>See 16 for setup||60||mA|



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## **3.2 OUTPUT SPECIFICATIONS** 

|**PARAMETER**|**CONDITIONS / DESCRIPTION**|**MIN**|**NOM**|**MAX**|**UNITS**|
|---|---|---|---|---|---|
|Output Voltage Range (VOUT)|Programmable with a resistor between TRIM and<br>GND pins|0.59||5.1|VDC|
|Output Voltage Setpoint Accuracy,<br>VOUT≥1 V|VIN= 12 V, IOUT= IOUT MAX,<br>0.1% trim resistor, room temperature|-1.0||1.0|%VOUT|
|Output Voltage Setpoint Accuracy,<br>VOUT< 1 V|VIN= 12 V, IOUT= IOUT MAX,<br>0.1% trim resistor, room temperature|-10||10|mVDC|
|Line Regulation, VOUT≥2.5 V|VIN MINto VIN MAX|||0.5|%VOUT|
|Load Regulation, VOUT≥2.5 V|0 to IOUT MAX|||0.4|%VOUT|
|Line Regulation, VOUT< 2.5 V|VIN MINto VIN MAX|||5|mVDC|
|Load Regulation, VOUT< 2.5 V|0 to IOUT MAX|||10|mVDC|
|Output Voltage Regulation|Over operating input voltage, resistive load, and<br>temperature conditions until the end of life|-2.0||2.0|%VOUT|
|Output Voltage Peak-to-Peak Ripple and<br>Noise, BW = 20 MHz, Full Load|VIN= 12 V, VOUT= 0.6 V<br>VIN= 12 V, VOUT= 3.3 V<br>VIN= 12 V, VOUT= 5.0 V||10<br>20<br>35|25<br>40<br>50|mV<br>mV<br>mV|
|Dynamic Regulation|VIN= 12 V, VOUT= 3.3 V|||||
|Peak Deviation|50 - 100% load step, Slew rate 1A/s,||80|250|mV|
|Settling Time|to 10% of peak deviation||50|100|s|
||VOUT= 0.6 V||69||%|
||VOUT= 0.8 V||75||%|
|Efficiency|VOUT= 1.2 V||81||%|
|VIN=12V|VOUT= 1.5 V||84||%|
|Full Load|VOUT= 1.8 V||85||%|
|Room temperature|VOUT= 2.5 V||89||%|
||VOUT= 3.3 V||91||%|
||VOUT= 5.0 V||92.5||%|
|Switching Frequency|||500||kHz|
|Output Current (IOUT)|VIN MINto VIN MAX|0||6|ADC|
|Output Current Derating<br>VIN= 12 V, VOUT= 0.6-5.0 V,|TAMB= 70°C, Natural Convection||6||ADC|
|Turn-On Delay Time1<br>POL is Enabled|ON/OFF pin is pulled high<br>From VIN= VIN MINto VOUT= 0.1*VOUT.SET||0.2|1|ms|
|Turn-On Delay Time2<br>POL is Disabled|VIN= 12 V<br>From ON/OFF pin changing its state from low to<br>high until VOUT= 0.1*VOUT.SET||0.2|1|ms|
|Rise Time2<br>COUT= 0 µF, Resistive Load|From VOUT= 0.1*VOUT.SETto VOUT= 0.9*VOUT.SET||1.5|2|ms|
|Admissible Output Capacitance|IOUT= IOUT MAX, Resistive load, ESR > 1 mΩ|||1000|µF|



## **3.3 PROTECTION SPECIFICATIONS** 

|**PARAMETER**|**CONDITIONS / DESCRIPTION**|**MIN**|**NOM**|**MAX**|**UNITS**|
|---|---|---|---|---|---|
|**Output Overcurrent Protection**||||||
|Type|||Auto-Restart|||
|Inception Point||105|150|180|%IOUT|
|Output Short Circuit Current (RMS value)|Output Short Circuit Current (RMS value)<br>ROUT < 0.01Ω||1|5|A|
|**Output Overvoltage Protection**||||||
|Type|||Auto-Restart|||
|Threshold|IOUT= IOUT MAX, room temperature|112|115|118|%VO.SET|



> 1 Total start-up time is the sum of the turn-on delay time and the rise time 

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## **3.4 FEATURE SPECIFICATIONS** 

|**PARAMETER**|**CONDITIONS / DESCRIPTION**|**MIN**|**NOM**|**MAX**|**UNITS**|
|---|---|---|---|---|---|
|**Enable (ON/OFF pin)**||||||
|ON/OFF Logic|Positive (enables the output when ON/OFF pin is<br>open or pulled high)|||||
|ON/OFF High Input Voltage|POL is ON|2.4||5.5|VDC|
|ON/OFF High Input Current|POL is ON|||1.0|mADC|
|ON/OFF Low Input Voltage|POL is OFF|-0.3||0.4|VDC|
|ON/OFF Low Input Current|POL is OFF|||0.55|mADC|



## **4. TYPICAL PERFORMANCE CHARACTERISTICS** 

## **4.1 EFFICIENCY CURVES** 

**==> picture [505 x 421] intentionally omitted <==**

**----- Start of picture text -----**<br>
85 85<br>80<br>80<br>ee<br>75<br>7a 75 ee<br>70 en— 72<br>70<br>65 mis ee A<br>Vin = 5V 65<br>60 TT, WL tt<br>Vin = 12V<br>60<br>55<br>Vin = 13.8V Vin = 10V Vin = 12V Vin = 13.8V<br>50 =| 55<br>0 1 2 3 4 5 6 0 1 2 3 4 5 6<br>Output Current, A Output Current, A<br>Figure 1.  Efficiency vs. Load.  Vout=0.6V  Figure 2.  Efficiency vs. Load.  Vout=1.2V<br>90 100<br>85 | 95<br>ES PT<br>80 90<br>A eo<br>75 85<br>Vin = 4.5V<br>70 80 Vin = 12V<br>Vin = 10V Vin = 12V Vin = 13.8V Vin = 13.8V<br>65 a 75 Eee<br>0 1 2 3 4 5 6 0 1 2 3 4 5 6<br>Output Current, A Output Current, A<br>Efficiency, %<br>Efficiency, % Efficiency, %<br>Efficiency, %<br>**----- End of picture text -----**<br>


Figure 3.  Efficiency vs. Load.  Vout=2.5 

Figure 4.  Efficiency vs. Load.  Vout=3.3V 

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**==> picture [213 x 177] intentionally omitted <==**

**----- Start of picture text -----**<br>
100<br>95<br>90<br>85<br>Vin = 6.5V<br>80 Vin = 12V<br>Vin = 13.8V<br>75<br>0 1 2 3 4 5 6<br>Output Current, A<br>Efficiency, %<br>**----- End of picture text -----**<br>


Figure 5.  Efficiency vs. Load.  Vout=5.0V 

## **4.2 TURN-ON CHARACTERISTICS** 

Figure 6. Typical Start-Up Using Remote On/Off (Vo = 0.6Vdc, Io=6A).  Ch1 – Vout, Ch2 – ON/OFF, Ch3 – Iout. Scale=10A/div 

chi) 1.00V  %Ch2)500mV_—M1.00ms Al Ch2 F 350mv| Figure 7. Typical Start-Up Using Remote On/Off  (Vo = 3.3 Vdc, Io=6A).  Ch1 – Vout, Ch2 – ON/OFF, Ch3 – Iout. Scale=10A/div 

**==> picture [88 x 15] intentionally omitted <==**

**----- Start of picture text -----**<br>
ch3[_750mvV 2.00 V<br>**----- End of picture text -----**<br>


Figure 8. Typical Start-Up with application of Vin (Vo = 0.6Vdc, Io = 6A).  Ch1 – Vout, Ch3 – Iout, Ch4 – Vin.  Scale=10A/div 

Figure 9. Typical Start-Up with application of Vin (Vo = 3.3Vdc, Io = 6A).  Ch1 – Vout, Ch3 – Iout, Ch4 – Vin.  Scale=10A/div 

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## **4.3 TRANSIENT RESPONSE** 

Figure 10. Transient Response to Dynamic Load Change from 50% to 100% of full load (Vin=12V, Vo=0.6Vdc).  Ch3 – Iout. Scale=10A/div 

Figure 11. Transient Response to Dynamic Load Change from 50% to 100% of full load (Vin=12V, Vo=3.3Vdc).  Ch3 – Iout. Scale=10A/div 

Figure 12. Transient Response to Dynamic Load Change from 50% to 100% of full load (Vin=12V, Vo=5.0Vdc).  Ch3 – Iout.  Scale=10A/div 

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## **5. APPLICATION INFORMATION** 

## **5.1 INPUT AND OUTPUT IMPEDANCE** 

The POL converter should be connected to the DC power source via low impedance.  In many applications, the inductance associated with the distribution from the power source to the input of the converter can affect the stability of the converter.  Internally, the converter includes 4.7 μ F (low ESR ceramics) of input capacitance which eliminates the need for external input capacitance. However, if the distribution of the input voltage to the POL converter contains high inductance, it is recommended to add a 100 μ F decoupling capacitor placed as close as possible to the converter input pins.  A low-ESR tantalum or POS capacitor connected across the input pins help ensuring stability of the POL converter and reduce input ripple voltage. 

A 22 μ F ceramic output capacitor is recommended to improve output ripple and dynamic response. 

It is important to keep low resistance and low inductance of PCB traces for connecting load to the output pins of the converter in order to maintain good load regulation. 

## **5.2 OUTPUT VOLTAGE PROGRAMMING** 

The output voltage can be programmed from 0.59V to 5.1V by connecting an external resistor RTRIM between TRIM pin (Pin 5) and GND pin (Pin 3), as shown in Figure 13. 

**==> picture [213 x 99] intentionally omitted <==**

**----- Start of picture text -----**<br>
YEV09T06<br>2 4<br>VIN VOUT<br>1 5<br>ON /OFF TRIM<br>Rload<br>R TRIM<br>3<br>GND<br>**----- End of picture text -----**<br>


Figure 13.  Programming Output Voltage with a Resistor 

The trim resistor RTRIM for a desired output voltage can be calculated using the following equation: 

**==> picture [117 x 25] intentionally omitted <==**

where: 

VOUT = Desired (trimmed) value of output voltage V 

RTRIM = Required value of the trim resistor in k Ω 

If the RTRIM is not used, the output voltage of the POL converter will be 0.591V. 

Note that the trim resistor tolerance directly affects the output voltage accuracy.  It is recommended to use ±0.1% trim resistors to meet the output voltage setpoint accuracy specified in p. 1.1. 

|**V0UT, V**|**V**|**Calculated**<br>**RTRIM, kΩ**|**Standard Value of 0.1%**<br>**Resistor, kΩ**|
|---|---|---|---|
|0.8|0.8|5.65|5.62|
|1.2|1.2|1.94|1.93|
|1.5|1.5|1.3|1.30|
|1.8|1.8|0.98|0.976|
|2.5|2.5|0.62|0.619|
|3.3|3.3|0.44|0.437|
|5.0|5.0|0.27|0.267|



Table 1.  Trim Resistor Values 

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## **5.3 ON/OFF (PIN 1)** 

The ON/OFF pin is used to turn the POL converter ON or OFF remotely by a signal from a system controller.  For positive logic, the POL converter is ON when the ON/OFF pin is at a logic high (2.4V min) or left open.   The POL converter is OFF when the ON/OFF pin is at a logic low (0.4V max) or connected to GND. 

The ON/OFF pin should be controlled with an open collector transistor as shown in Figure 14. 

**==> picture [231 x 88] intentionally omitted <==**

**----- Start of picture text -----**<br>
INPUT<br>VOLTAGE 2 VIN YEV09T06<br>VOUT 4<br>1 ON /OFF Internal Enable  TRIM 5<br>Circuit<br>CONTROL  Rload<br>INPUT<br>4.32k R TRIM<br>3 GND<br>**----- End of picture text -----**<br>


Figure 14.  Circuit Configuration For ON/OFF Function 

## **5.4 PROTECTIONS** 

## **5.4.1 INPUT UNDERVOLTAGE LOCKOUT** 

The POL converter will shut down when the input voltage drops below a predetermined voltage.  It will start automatically when the input voltage exceeds the specified threshold. 

## **5.4.2 OUTPUT OVERCURRENT PROTECTION** 

The POL converter is protected against overcurrent and short circuit conditions.  Upon sensing an overcurrent condition, the POL converter will enter hiccup mode of operation.  Once the overload or short circuit condition is removed, the POL converter will automatically restart and Vout will return to its nominal value. 

## **5.4.3 OUTPUT OVERVOLTAGE PROTECTION** 

The POL converter is protected against overvoltage on the output.  If the output voltage is higher than 115% of its nominal value set by the RTRIM, the high side MOSFET will be immediately turned off and the low side MOSFET will be turned on.  The POL converter will remain in the state until the output voltage reduces below 115% of its nominal value.  At that point the POL converter will automatically restart. 

## **6. CHARACTERIZATION** 

## **6.1 RIPPLE AND NOISE** 

The output voltage ripple and input reflected ripple current waveforms are measured using the test setup shown in Figure 16. 

**==> picture [219 x 41] intentionally omitted <==**

**----- Start of picture text -----**<br>
YEV09T06<br>1   H C IN 22  F<br>100  F  DC/DC ceramic Vout<br>tantalum Converter capacitor<br>V source +  2 x 10  F<br>ceramic<br>**----- End of picture text -----**<br>


Figure 15.  Test Setup for Measuring Input Reflected-Ripple Current and Output Voltage Ripple 

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## **7. SAFETY** 

The YEV09T06 POL converters **do not provide isolation** from input to output.  The input devices powering YEV09T06 must provide relevant isolation requirements according to all IEC 62368-1 based standards.  Nevertheless, if the system using the converter needs to receive safety agency approval, certain rules must be followed in the design of the system. In particular, all of the creepage and clearance requirements of the end-use safety requirements must be observed. These requirements are included in CSA/UL 623681 and EN 62368-1, although specific applications may have other or additional requirements. 

The YEV09T06 POL converters have no internal fuse.  If required, the external fuse needs to be provided to protect the converter from catastrophic failure.  Refer to the “Input Fuse Selection for DC/DC converters” application note on www.belpowersolutions.com for proper selection of the input fuse.  Both input traces and the chassis ground trace (if applicable) must be capable of conducting a current of 1.5 times the value of the fuse without opening. 

To comply with safety agencies’ requirements, a recognized fuse must be used in series with the input line.  The fuse must not be placed in the grounded input line.  Abnormal and component failure tests were conducted with the POL input protected by a fastacting 20 A fuse.  If a fuse rated greater than 20 A is used, additional testing may be required. 

The maximum DC voltage between any two pins is Vin under all operating conditions.  In order for the output of the YEV09T06 POL converter to be considered as ES1, according to all IEC 62368-1 based standards, the input to the POL needs to be supplied by an isolated secondary source providing a ES1 also. 

## **8. PIN ASSIGNMENTS AND DESCRIPTION** 

|**PIN NAME**|**PIN NUMBER**|**PIN NUMBER**<br>**PIN TYPE**|**PIN TYPE**<br>**BUFFER TYPE**|**PIN DESCRIPTION**|**NOTES**|
|---|---|---|---|---|---|
|ON/OFF|1|I|PU|Enable|Pull high to turn ON the POL|
|VIN|2|P||Input Voltage||
|GND|3|P||Power Ground||
|VOUT|4|P||Output Voltage||
|TRIM|5|I|A|Output Voltage Trim|Connect a high accuracy resistor between<br>TRIM and GMD pins to set the output voltage|



Legend: I=input, O=output, I/O=input/output, P=power, A=analog, PU=internal pull-up 

## **9. MECHANICAL DRAWINGS** 

**NOTE:** All Dimensions are in inches. Tolerances:  X.XX:  0.02” X.XXX:  0.01” 

Figure 16.  Mechanical Drawing 

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Figure 17. Recommended Footprint – Top View 

## **10. ORDERING INFORMATION** 

|**YE**|**V**|**09**|**T**|**06**|**–**|**0**|**z**|
|---|---|---|---|---|---|---|---|
|**PRODUCT**<br>**FAMILY**|**PRODUCT**<br>**PROFILE**|**PROFILE**<br>**INPUT**<br>**VOLTAGE**|**PCB**<br>**MOUNTING**|**OUTPUT**<br>**CURRENT**|**DASH**|**OPTIONS**|**ROHS COMPLIANCE**|
|||||||**0**– 0 to 70 °C|**No suffix**- RoHS compliant|
|POL<br>Converter|Converter<br>Vertical|4.5 V to 13.8 V|4.5 V to 13.8 V<br>Through-hole|6 A||operating range.<br>**R**– -40 to 85 °C|with Pb solder exemption 2<br>**G**- RoHS compliant for all six|
|||||||operating range.|substances|



Example: **YEV09T06-0G** :  YEV09T06 POL converter with the commercial temperature range and lead-free solder. 

**NUCLEAR AND MEDICAL APPLICATIONS** - Products are not designed or intended for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems. 

**TECHNICAL REVISIONS** - The appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. Specifications are subject to change without notice. 

2 The solder exemption refers to all the restricted materials except lead in solder.  These materials are Cadmium (Cd), Hexavalent chromium (Cr6+), Mercury (Hg), Polybrominated biphenyls (PBB), Polybrominated diphenylethers (PBDE), and Lead (Pb) used anywhere except in solder. 

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