YNS05S10-0

_**YNS05S10 DC-DC Converter Data Sheet**_ SN. _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ power-on$$$ 

_**The YNS05S10 converter is not recommended for new designs and has been replaced by the YS05S10. Please refer to the YS05S10 data sheet for new product specifications.**_ 

## _**The Products: Y-Series**_ 

## **Features** 

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

- Delivers up to 10 A (36 W) 

- No derating up to 85 C 

- Surface-mount package 

- Industry-standard footprint and pinout 

- Small size and low-profile: 1.30” x 0.53” x 0.314” (33.02 mm x 13.46 mm x 7.98 mm) 

- Weight: 0.22 oz [6.12 g] 

- Coplanarity less than 0.003”, maximum 

- Synchronous Buck Converter Topology 

- Start up into pre-biased output 

## **Applications** 

- Intermediate Bus Architectures 

- Telecommunications 

- Data communications 

- Distributed Power Architectures 

- Servers, workstations 

- No minimum load required 

- Programmable output voltage via external resistor 

- Operating ambient temperature: -40 °C to 85 °C 

- Remote output sense 

- Remote ON/OFF (positive or negative) 

- Fixed-frequency operation 

- Auto-reset output overcurrent protection 

- Auto-reset overtemperature protection 

## **Benefits** 

- High efficiency – no heat sink required 

- Reduces total solution board area 

- Tape and reel packing 

- Compatible with pick & place equipment 

   - High reliability, MTBF = 32.54 million hours calculated per Telcordia TR-332, Method I Case 1 

   - All materials meet UL94, V-0 flammability rating 

   - UL60950 recognition in U.S. & Canada, and DEMKO certification per IEC/EN60950 

- Minimizes part numbers in inventory 

## **Description** 

Power-One’s point-of-load converters are recommended for use with regulated bus converters in an Intermediate Bus Architecture (IBA). The Y-Series of non-isolated dc-dc converters deliver up to 10 A of output current in an industry-standard surface-mount package.  Operating from a 3.0 to 5.5 VDC input, the YNS05S10 converters are ideal choices for Intermediate Bus Architectures where Point-of-Load (POL) power delivery is generally a requirement. The converters provide an extremely tight regulated programmable output voltage from 0.7525 to 3.63 VDC. 

The Y-Series of converters provide exceptional thermal performance, even in high temperature environments with minimal airflow. No derating is required up to 85 C, even without airflow at natural convection. This performance is accomplished through the use of advanced circuitry, packaging, and processing techniques to achieve a design possessing ultra-high efficiency, excellent thermal management, and a very low-body profile. 

The low-body profile and the preclusion of heat sinks minimize impedance to system airflow, thus enhancing cooling for both upstream and downstream devices. The use of 100% automation for assembly, coupled with advanced power electronics and thermal design, results in a product with extremely high reliability. 

MCD10193 Rev. 1.0, 21-Jun-10 

Page 1 of 25 

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_**YNS05S10 DC-DC Converter Data Sheet**_ S™. _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ NSpower-onchanging the Shape$$ ofPower 

## **Electrical Specifications** 

_Conditions: TA = 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin =  5 VDC, Vout = 0.7525 – 3.63 VDC, unless otherwise specified._ 

|**Parameter**<br>~~Ge~~|**Notes**<br>~~Ge~~|**Min**<br>~~Ge~~|**Typ **<br>~~Ge~~|**Max**<br>~~Ge~~|**Units**<br>~~Ge~~|
|---|---|---|---|---|---|
|**Absolute Maximum Ratings**||||||
|InputVoltage<br>~~eG~~|Continuous<br>~~eG~~|-0.3<br>~~eG~~|~~eG~~|6<br>~~eG~~|VDC<br>~~eG~~|
|Operating Ambient Temperature<br>~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|-40<br>~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|85<br>~~eG~~<br>~~eG~~|°C<br>~~eG~~<br>~~eG~~|
|Storage Temperature<br>~~eG~~<br>~~Ge~~|~~eG~~<br>~~Ge~~|-55<br>~~eG~~<br>~~Ge~~|~~eG~~<br>~~Ge~~|125<br>~~eG~~<br>~~Ge~~|°C<br>~~eG~~<br>~~Ge~~|
|**Feature Characteristics**||||||
|SwitchingFrequency<br>~~eG~~|Full TemperatureRange<br>~~eG~~|250<br>~~eG~~|300<br>~~eG~~|350<br>~~eG~~|kHz<br>~~eG~~|
|Output Voltage Trim Range1, 2<br>~~GO~~|By external resistor, See Trim Table 1<br>~~GO~~|0.7525<br>~~GO~~|~~GO~~|3.63<br>~~GO~~|VDC<br>~~GO~~|
|Remote Sense Compensation1<br>~~GD~~|Percent of VOUT(NOM)<br>~~GD~~|~~GD~~|~~GD~~|0.5<br>~~GD~~|VDC<br>~~GD~~|
|Turn-On DelayTime3<br>~~GD~~<br>~~eG~~|Full resistiveload<br>~~GD~~<br>~~eG~~|~~GD~~<br>~~eG~~||||
|With Vin  (Converter Enabled, then<br>Vinapplied)<br>~~es~~|From Vin = Vin(min) toVo=0.1* Vo(nom)<br>~~es~~|3<br>~~es~~|3.5<br>~~es~~|4.5<br>~~es~~|ms<br>~~es~~|
|With Enable (Vin = Vin(nom)<br>applied,  then enabled)<br>~~a~~|From enable to Vo=0.1*Vo(nom)<br>~~a~~|3<br>~~a~~|3.5<br>~~a~~|4.5<br>~~a~~|ms<br>~~a~~|
|Rise time2<br>~~a~~<br>~~a~~|From 0.1*Vo(nom) to 0.9*Vo(nom)<br>~~a~~<br>~~a~~<br>~~G~~|3<br>~~a~~<br>~~a~~|3.5<br>~~a~~<br>~~a~~|5<br>~~a~~<br>~~a~~|ms<br>~~a~~<br>~~a~~|
|ON/OFFControl(PositiveLogic)4<br>~~eG~~|~~eG~~|||||
|Converter Off<br>~~GG~~|~~GG~~|-5<br>~~GG~~|~~GG~~|0.8<br>~~GG~~|VDC<br>~~GG~~|
|ConverterOn<br>~~Ge~~<br>~~pe~~|~~Ge~~|2.4<br>~~Ge~~|~~Ge~~|5.5<br>~~Ge~~|VDC<br>~~Ge~~|
|ON/OFFControl(NegativeLogic)4<br>~~pe~~||||||
|Converter Off<br>~~pe~~<br>~~GO~~|~~GO~~|2.4<br>~~GO~~|~~GO~~|5.5<br>~~GO~~|VDC<br>~~GO~~|
|Converter On<br>~~GO~~<br>~~a~~|~~GO~~|-5<br>~~GO~~|~~GO~~|0.8<br>~~GO~~|VDC<br>~~GO~~|



## Additional Notes: 

> 1 The output voltage should not exceed 3.63 V (taking into account both the programming and remote sense compensation). 

> 2 The trim resistor connected across the GND (pin 5) and TRIM (pin 3) pins of the converter. 

> 3 Note that startup time is the sum of turn-on delay time and rise time. 4 

The converter is on if ON/OFF pin is left open. 

MCD10193 Rev. 1.0, 21-Jun-10 

Page 2 of 25 

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_**YNS05S10 DC-DC Converter Data Sheet**_ S™. _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ NSApower-onchanging the Shape$$ ofPower 

## **Electrical Specifications (continued)** 

_Conditions: TA = 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 5 VDC, Vout = 0.7525 – 3.63 VDC, unless otherwise specified._ 

|**Parameter**<br>~~a~~|**Notes**<br>~~G~~|**Min**|**Typ **|**Max**|**Units**|
|---|---|---|---|---|---|
|**Input Characteristics**<br>~~pT~~||||||
|OperatingInputVoltageRange<br>~~pT~~<br>~~eG~~|~~pT~~<br>~~eG~~|3.0<br>~~pT~~<br>~~eG~~|5.0<br>~~pT~~<br>~~eG~~|5.5<br>~~pT~~<br>~~eG~~|VDC<br>~~pT~~<br>~~eG~~|
|Input UndervoltageLockout<br>~~RO~~|~~RO~~|||||
|Turn-on Threshold<br>~~a~~|Guaranteed by controller|1.95|2.05|2.15|VDC|
|Turn-off Threshold<br>~~a~~|Guaranteed by controller|1.73|1.9|2.07|VDC|
|Maximum Input Current<br>~~a~~||||||
|VIN =4.5 VDC,  IOUT =10 A<br>~~a~~<br>~~Ge~~|VOUT =3.3 VDC<br>~~Ge~~|~~Ge~~|~~Ge~~|7.9<br>~~Ge~~|ADC<br>~~Ge~~|
|VIN=3.0VDC,IOUT= 10A<br>~~Ge~~<br>~~eG~~|VOUT= 2.5VDC<br>~~Ge~~<br>~~eG~~|~~Ge~~<br>~~eG~~|~~Ge~~<br>~~eG~~|9.1<br>~~Ge~~<br>~~eG~~|ADC<br>~~Ge~~<br>~~eG~~|
|VIN=3.0VDC,IOUT= 10A<br>~~eG~~<br>~~a~~<br>~~a~~|VOUT= 2.0VDC<br>~~eG~~<br>|~~eG~~<br>|~~eG~~<br>|7.3<br>~~eG~~<br>|ADC<br>~~eG~~<br>|
|VIN =3.0 VDC,  IOUT =10 A<br>~~a~~|VOUT =1.8 VDC<br>|||6.7<br>|ADC<br>|
|VIN=3.0VDC,IOUT= 10A<br>~~aeG~~|VOUT= 1.5VDC<br>~~eG~~|~~eG~~|~~eG~~|5.7<br>~~eG~~|ADC<br>~~eG~~|
|VIN=3.0VDC,IOUT= 10A<br>~~eG~~|VOUT= 1.2 VDC<br>~~eG~~|~~eG~~|~~eG~~|4.7<br>~~eG~~|ADC<br>~~eG~~|
|VIN =3.0 VDC,  IOUT =10 A<br>~~eG~~<br>~~eG~~|VOUT =1.0 VDC<br>~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|4.0<br>~~eG~~<br>~~eG~~|ADC<br>~~eG~~<br>~~eG~~|
|VIN=3.0VDC,IOUT= 10A<br>~~eG~~<br>~~eG~~|VOUT=0.7525VDC<br>~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|3.2<br>~~eG~~<br>~~eG~~|ADC<br>~~eG~~<br>~~eG~~|
|Input Stand-by Current (Converterdisabled)<br>~~eG~~|Vin =5.0VDC<br>~~eG~~|~~eG~~|10<br>~~eG~~|~~eG~~|mA<br>~~eG~~|
|Input No Load Current(Converter enabled)<br>~~GO~~|Vin=5.5 VDC<br>~~GO~~|~~GO~~||||
|~~a~~|VOUT=3.3VDC||90||mA|
|~~eG~~|VOUT= 2.5VDC<br>~~eG~~|~~eG~~|90<br>~~eG~~|~~eG~~|mA<br>~~eG~~|
|~~eG~~<br>~~eG~~|VOUT =2.0 VDC<br>~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|80<br>~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|mA<br>~~eG~~<br>~~eG~~|
|~~eG~~<br>~~eG~~|VOUT= 1.8VDC<br>~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|75<br>~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|mA<br>~~eG~~<br>~~eG~~|
|~~eG~~<br>~~a~~<br>~~a~~|VOUT= 1.5VDC<br>~~eG~~<br>|~~eG~~<br>|70<br>~~eG~~<br>|~~eG~~<br>|mA<br>~~eG~~<br>|
|~~a~~|VOUT =1.2 VDC<br>||65<br>||mA<br>|
|~~aeG~~|VOUT= 1.0VDC<br>~~eG~~|~~eG~~|60<br>~~eG~~|~~eG~~|mA<br>~~eG~~|
|~~ee~~|VOUT=0.7525VDC<br>~~ee~~|~~ee~~|50<br>~~ee~~|~~ee~~|mA<br>~~ee~~|
|Input Reflected-Ripple Current - **i**_s_<br>~~ee~~<br>~~Ge~~|See Fig. G for setup (BW = 20 MHz)<br>~~ee~~<br>~~Ge~~|~~ee~~<br>~~Ge~~|15<br>~~ee~~<br>~~Ge~~|~~ee~~<br>~~Ge~~|mAP-P<br>~~ee~~<br>~~Ge~~|



MCD10193 Rev. 1.0, 21-Jun-10 

Page 3 of 25 

_www.power-one.com_ 

_**YNS05S10 DC-DC Converter Data Sheet**_ S™. _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ NSApower-onchanging the Shape$$ ofPower 

## **Electrical Specifications (continued)** 

|**Parameter**<br>~~Ge~~|**Notes**<br>~~Ge~~|**Min**<br>~~Ge~~|**Typ **<br>~~Ge~~|**Max**<br>~~Ge~~|**Units**<br>~~Ge~~|
|---|---|---|---|---|---|
|**Output Characteristics**<br>~~pT~~||||||
|OutputVoltage SetPoint (noload)<br>~~pT~~<br>~~eG~~|~~pT~~<br>~~eG~~|-1.5<br>~~pT~~<br>~~eG~~|Vout<br>~~pT~~<br>~~eG~~|+1.5<br>~~pT~~<br>~~eG~~|%Vout<br>~~pT~~<br>~~eG~~|
|OutputRegulation<br>~~Ge~~|~~Ge~~|||||
|Over Line<br>~~Ge~~|Full resistive load<br>~~Ge~~|~~Ge~~|0.1<br>~~Ge~~|0.5<br>~~Ge~~|%Vout<br>~~Ge~~|
|Over Load|From noload tofull load<br>~~ee~~|~~ee~~|0.1<br>~~ee~~|0.5<br>~~ee~~|%Vout<br>~~ee~~|
|Output Voltage Range<br>(Over all operating input voltage, resistive load<br> and temperature conditions untilend of life )<br>~~es~~|~~es~~<br>~~ee~~|-3<br>~~es~~<br>~~ee~~|~~es~~<br>~~ee~~|+3<br>~~es~~<br>~~ee~~|%Vout<br>~~es~~<br>~~ee~~|
|OutputRipple andNoise– 20MHzbandwidth<br>~~es~~<br>~~eG~~|hOver line,load and temperature (Fig.G)<br>~~es~~<br>~~ee ~~<br>~~eG~~|~~es~~<br> ~~ee~~<br>~~eG~~||||
|Peak-to-Peak<br>~~Ge~~|VOUT =3.3 VDC<br>~~Ge~~|~~Ge~~|30<br>~~Ge~~|50<br>~~Ge~~|mVP-P<br>~~Ge~~|
|Peak-to-Peak<br>~~Ge~~|VOUT=0.7525VDC<br>~~Ge~~|~~Ge~~|15<br>~~Ge~~|30<br>~~Ge~~|mVP-P<br>~~Ge~~|
|External Load Capacitance<br>~~eG~~|Plusfull load (resistive)<br>~~eG~~|~~eG~~|~~eG~~|~~eG~~|~~eG~~|
|Min ESR>1 mΩ<br>~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|1,000<br>~~eG~~<br>~~eG~~|μF<br>~~eG~~<br>~~eG~~|
|Min ESR > 10mΩ<br>~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|5,000<br>~~eG~~<br>~~eG~~|μF<br>~~eG~~<br>~~eG~~|
|Output Current Range<br>~~Ge~~|~~Ge~~|0<br>~~Ge~~|~~Ge~~|10<br>~~Ge~~|A<br>~~Ge~~|
|Output Current Limit Inception(IOUT)<br>~~GG~~<br>~~a~~|~~GG~~<br>~~Ge~~|~~GG~~|18<br>~~GG~~|~~GG~~|A<br>~~GG~~|
|Output Short-Circuit Current(Hiccupmode)<br>~~a~~|Short = 10 mΩ,continuous<br>~~Ge~~||3||Arms|
|**Dynamic Response**<br>~~a~~<br>~~Ge~~<br>~~pT~~||||||
|50% Load current change from<br> 5A -10A withdi/dt=5A/μs5<br>~~pT~~<br>~~ee~~|Co= 47μFtant. + 1μFceramic<br>~~pT~~<br>~~ee~~|~~pT~~<br>~~ee~~|110<br>~~pT~~<br>~~ee~~|~~pT~~<br>~~ee~~|mV<br>~~pT~~<br>~~ee~~|
|Settling Time (VOUT<10% peak deviation)5<br>~~GG~~|~~GG~~|~~GG~~|25<br>~~GG~~|~~GG~~|µs<br>~~GG~~|
|50% Load current change from<br>10 A-5 A with di/dt= -5 A/μs5<br>~~Ge~~|Co=47 μF tant.+1 μF ceramic<br>~~Ge~~|~~Ge~~|120<br>~~Ge~~|~~Ge~~|mV<br>~~Ge~~|
|SettlingTime(VOUT< 10%peak deviation)5<br>~~Ge~~<br>~~Gn~~|~~Ge~~<br>~~Gn~~|~~Ge~~<br>~~Gn~~|25<br>~~Ge~~<br>~~Gn~~|~~Ge~~<br>~~Gn~~|µs<br>~~Ge~~<br>~~Gn~~|
|**Efficiency**<br>~~Ge~~|Full load (10A)<br>~~Ge~~|||||
|~~a~~|VOUT=3.3VDC<br>~~GG~~|~~GG~~|94.5<br>~~GG~~|~~GG~~|%<br>~~GG~~|
|~~GG~~|VOUT =2.5 VDC<br>~~GG~~|~~GG~~|93.0<br>~~GG~~|~~GG~~|%<br>~~GG~~|
|~~eG~~|VOUT= 2.0VDC<br>~~eG~~|~~eG~~|92.0<br>~~eG~~|~~eG~~|%<br>~~eG~~|
|~~eG~~<br>~~eG~~|VOUT= 1.8VDC<br>~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|91.5<br>~~eG~~<br>~~eG~~|~~eG~~<br>~~eG~~|%<br>~~eG~~<br>~~eG~~|
|~~eG~~|VOUT =1.5 VDC<br>~~eG~~|~~eG~~|89.5<br>~~eG~~|~~eG~~|%<br>~~eG~~|
|~~Ge~~|VOUT= 1.2 VDC<br>~~Ge~~|~~Ge~~|87.5<br>~~Ge~~|~~Ge~~|%<br>~~Ge~~|
|~~Ge~~|VOUT= 1.0VDC<br>~~Ge~~|~~Ge~~|86.0<br>~~Ge~~|~~Ge~~|%<br>~~Ge~~|
|~~eG~~|VOUT=0.7525VDC<br>~~eG~~|~~eG~~|83.0<br>~~eG~~|~~eG~~|%<br>~~eG~~|



## Additional Notes: 

> 5 See waveforms for dynamic response and settling time for different output voltages. 

MCD10193 Rev. 1.0, 21-Jun-10 

Page 4 of 25 

_www.power-one.com_ 

_**YNS05S10 DC-DC Converter Data Sheet**_ S™N. _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ OL NS[changing] ————————,[the][ Shape][of][Power] 

## **Operations** 

## **Input and Output Impedance** 

The Y-Series converter should be connected via a low impedance to the DC power source. 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. The use of decoupling capacitors is recommended in order to ensure stability of the converter and reduce input ripple voltage.  Internally, the converter has 52 μF (low ESR ceramics) of input capacitance. 

In a typical application, low - ESR tantalum or POS capacitors will be sufficient to provide adequate ripple voltage filtering at the input of the converter. However, very low ESR ceramic capacitors 100 - 200 μF are recommended at the input of the converter in order to minimize the input ripple voltage. They should be placed as close as possible to the input pins of the converter. 

The YNS05S10 has been designed for stable operation with or without external capacitance. Low ESR ceramic capacitors placed as close as possible to the load (minimum 47 μF) are recommended for improved transient performance and lower output voltage ripple. 

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

Fig. A shows the input voltage ripple for various output voltages using four 47 μF input ceramic capacitors. The same plot is shown in Fig. B with one 470 μF polymer capacitor (6TPB470M from Sanyo) in parallel with two 47 μF ceramic capacitors at full load. 

**==> picture [203 x 117] intentionally omitted <==**

**----- Start of picture text -----**<br>
140<br>120<br>100<br>80<br>60<br>40 Vin=5.0V<br>20 Vin=3.3V<br>0<br>0 1 2 3 4<br>Vout [V]<br>Input Voltage Ripple [mV]<br>**----- End of picture text -----**<br>


**Fig. A: Input Voltage Ripple, CIN = 4x47 μF ceramic, full load.** 

**==> picture [203 x 117] intentionally omitted <==**

**----- Start of picture text -----**<br>
160<br>140<br>120<br>100<br>80<br>60<br>40 Vin=5.0V<br>20 Vin=3.3V<br>0<br>0 1 2 3 4<br>Vout [V]<br>Input Voltage Ripple [mV]<br>**----- End of picture text -----**<br>


**Fig. B: Input Voltage Ripple, CIN = 470 μF polymer + 2 x 47 μF ceramic.** 

## **ON/OFF (Pin 1)** 

The ON/OFF pin is used to turn the power converter on or off remotely via a system signal.  There are two remote control options available, positive logic (standard option) and negative logic, with ON/OFF signal referenced to GND. The typical connections 

are shown in Fig. C. 

**==> picture [237 x 110] intentionally omitted <==**

**----- Start of picture text -----**<br>
Vin Y-Series SENSE<br>Converter<br>R*<br>(Top View)<br>ON/OFF   Vout<br>Vin<br>Rload<br>|<br>GND TRIM<br>CONTROL<br>is INPUT<br>R* is for negative logic option only<br>**----- End of picture text -----**<br>


**Fig. C: Circuit configuration for ON/OFF function.** 

To turn the converter on the ON/OFF pin should be at a logic low or left open, and to turn the converter off the ON/OFF pin should be at a logic high or connected to Vin. See the Electrical Specifications for logic high/low definitions. 

The positive logic version turns the converter on when the ON/OFF pin is at a logic high or left open, and turns the converter off when at a logic low or shorted to GND. 

The negative logic version turns the converter on when the ON/OFF pin is at a logic low or left open, and turns the converter off when the ON/OFF pin is at a logic high or connected to Vin. 

The ON/OFF pin is internally pulled up to Vin for a positive logic version, and pulled down for a negative logic version. A TTL or CMOS logic gate, 

MCD10193 Rev. 1.0, 21-Jun-10 

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_**YNS05S10 DC-DC Converter Data Sheet**_ S™. _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ OL NS[changing] ————————,[the][ Shape][of][Power] 

open-collector (open-drain) transistor can be used to drive ON/OFF pin. This device must be capable of: 

- sinking up to 1.2 mA at a low level voltage of  0.8 V 

- sourcing up to 0.25 mA at a high logic level of 2.3 V - 5.5 V. 

When using open-collector (open-drain) transistor with a negative logic option, add a pull-up resistor (R*) to Vin as shown in Fig. C: 

- 20 K, if the minimum Vin is 4.5 V 

- 10 K, if the minimum Vin is 3.0 V 

- 5 K, if the undervoltage shutdown at 2.05 - 2.15 V is required. 

## **Remote Sense (Pin 2)** 

The remote sense feature of the converter compensates for voltage drops occurring only between Vout pin (Pin 4) of the converter and the load. The SENSE (Pin 2) pin should be connected at the load or at the point where regulation is required (see Fig. D). There is no sense feature on the output GND return pin, where the solid ground plane should provide a low voltage drop. 

**==> picture [237 x 118] intentionally omitted <==**

**----- Start of picture text -----**<br>
Vin  Y-Series SENSE<br>Converter<br>(Top View) Rw<br>ON/OFF   Vout<br>Vin<br>| Rload<br>GND TRIM<br>ot<br>Rw<br>Fig. D: Remote sense circuit configuration.<br>**----- End of picture text -----**<br>


If remote sensing is not required, the SENSE pin must be connected to the Vout pin (Pin 4) to ensure the converter will regulate at the specified output voltage. If these connections are not made, the converter will deliver an output voltage that is slightly higher than the specified value. 

Because the sense lead carries minimal current, large traces on the end-user board are not required. However, sense trace should be located close to a ground plane to minimize system noise and ensure optimum performance. 

When utilizing the remote sense feature, care must be taken not to exceed the maximum allowable output power capability of the converter, which is equal to the product of the nominal output voltage and the allowable output current for the given conditions. 

When using remote sense, the output voltage at the converter can be increased up to 0.5 V above the nominal rating in order to maintain the required voltage across the load. Therefore, the designer must, if necessary, decrease the maximum current (originally obtained from the derating curves) by the same percentage to ensure the converter’s actual output power remains at or below the maximum allowable output power. 

## **Output Voltage Programming (Pin 3)** 

The output voltage can be programmed from 0.7525 to 3.63 VDC by connecting an external resistor between TRIM pin (Pin 3) and GND pin (Pin 5); see Fig. E. Note that when a trim resistor is not connected, the output voltage of the converter is 0.7525 VDC. 

**==> picture [239 x 153] intentionally omitted <==**

**----- Start of picture text -----**<br>
Vin Y-Series SENSE<br>Converter<br>(Top View)<br>ON/OFF   Vout<br>Vin<br>| Rload<br>TRIM<br>GND<br>RTRIM<br>as<br>Fig. E: Configuration for programming output voltage.<br>A trim resistor, RTRIM, for a desired output voltage<br>can be calculated using the following equation:<br>**----- End of picture text -----**<br>


**==> picture [219 x 24] intentionally omitted <==**

where, 

**RTRIM**  Required value of trim resistor [kΩ] **VO**  **REQ**  Desired (trimmed) output voltage [V] 

Note that the tolerance of a trim resistor directly affects the output voltage tolerance. It is recommended to use standard 1% or 0.5% resistors; for tighter tolerance, two resistors in parallel are recommended rather than one standard value from Table 1. 

Ground pin of the trim resistor should be connected directly to the converter GND pin (Pin 5) with no voltage drop in between. Table 1 provides the trim resistor values for popular output voltages. 

MCD10193 Rev. 1.0, 21-Jun-10 

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_**YNS05S10 DC-DC Converter Data Sheet**_ _NSA[Ll] changingS™.——————————————————————————————————the Shape ofPower _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ 

|**Table 1: Trim Resistor Value**|**Table 1: Trim Resistor Value**|**Table 1: Trim Resistor Value**|
|---|---|---|
|**V0-REG [V]**|**RTRIM [kΩ]**|**The Closest**<br>**Standard Value [kΩ]**|
|0.7525|open||
|1.0|80.0|80.6|
|1.2|41.97|42.2|
|1.5|23.1|23.2|
|1.8|15|15|
|2.0|11.78|11.8|
|2.5|6.95|6.98|
|3.3|3.16|3.16|
|3.63|2.21|2.21|



The output voltage can also be programmed by external voltage source. To make trimming less sensitive, a series external resistor Rext is recommended between TRIM pin and programming voltage source. Control Voltage can be calculated by the formula: 

**==> picture [263 x 23] intentionally omitted <==**

where, 

**VCTRL**  Control voltage [V] 

**REXT**  External resistor between TRIM pin and voltage source; the value can be chosen depending on the required output voltage range [kΩ]. 

Control voltages with **REXT**  0 and **REXT**  15 K are shown in Table 2. 

|Control voltages with<br><br>**EXT**<br>**REXT**<br>0 and<br><br>**EXT**<br>**REXT**<br>15 K are<br>shown in Table 2.|Control voltages with<br><br>**EXT**<br>**REXT**<br>0 and<br><br>**EXT**<br>**REXT**<br>15 K are<br>shown in Table 2.|Control voltages with<br><br>**EXT**<br>**REXT**<br>0 and<br><br>**EXT**<br>**REXT**<br>15 K are<br>shown in Table 2.|
|---|---|---|
|**Table 2: Control Voltage [VDC]**|||
|**V0-REG [V]**|**VCTRL(REXT = 0) V**|**= 0) VCTRL(REXT = 15 K)**|
|0.7525|0.700|0.700|
|1.0|0.658|0.535|
|1.2|0.624|0.401|
|1.5|0.573|0.201|
|1.8|0.522|-0.000|
|2.0|0.488|-0.133|
|2.5|0.403|-0.468|
|3.3|0.268|-1.002|
|3.63|0.257|-1.044|



## **Protection Features** 

## **Input Undervoltage Lockout** 

Input undervoltage lockout is standard with this converter. The converter will shut down when the input voltage drops below a pre-determined voltage; 

it will start automatically when Vin returns to a specified range. 

The input voltage must be typically 2.05 V for the converter to turn on. Once the converter has been turned on, it will shut off when the input voltage drops below typically 1.9 V. 

## **Output Overcurrent Protection (OCP)** 

The converter is protected against overcurrent and short circuit conditions. Upon sensing an overcurrent condition, the converter will enter hiccup mode. Once over-load or short circuit condition is removed, Vout will return to nominal value. 

## **Overtemperature Protection (OTP)** 

The converter will shut down under an overtemperature condition to protect itself from overheating caused by operation outside the thermal derating curves, or operation in abnormal conditions such as system fan failure. After the converter has cooled to a safe operating temperature, it will automatically restart. 

## **Safety Requirements** 

The converter meets North American and International safety regulatory requirements per UL60950 and EN60950. The maximum DC voltage between any two pins is Vin under all operating conditions. Therefore, the unit has ELV (extra low voltage) output; it meets SELV requirements under the condition that all input voltages are ELV. 

The converter is not internally fused. To comply with safety agencies’ requirements, a recognized fuse with a maximum rating of 20 Amps must be used in series with the input line. 

## **Characterization** 

## **General Information** 

The converter has been characterized for many operational aspects, to include thermal derating (maximum load current as a function of ambient temperature and airflow) for vertical and horizontal mountings, efficiency, startup and shutdown parameters, output ripple and noise, transient response to load step-change, overload, and short circuit. 

The figures are numbered as Fig. x.y, where x indicates the different output voltages, and y associates with specific plots (y = 1 for the vertical thermal derating, …). For example, Fig. x.1 will refer to the vertical thermal derating for all the output voltages in general. 

MCD10193 Rev. 1.0, 21-Jun-10 

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_**YNS05S10 DC-DC Converter Data Sheet 3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ _‘__o ofPower _o i i “‘ 

The following pages contain specific plots or waveforms associated with the converter. Additional comments for specific data are provided below. 

## **Test Conditions** 

All data presented were taken with the converter soldered to a test board, specifically a 0.060” thick printed wiring board (PWB) with four layers. The top and bottom layers were not metalized. The two inner layers, comprised of two-ounce copper, were used to provide traces for connectivity to the converter. 

The lack of metalization on the outer layers as well as the limited thermal connection ensured that heat transfer from the converter to the PWB was minimized. This provides a worst-case but consistent scenario for thermal derating purposes. 

All measurements requiring airflow were made in the vertical and horizontal wind tunnels using Infrared (IR) thermography and thermocouples for thermometry. 

Ensuring components on the converter do not exceed their ratings is important to maintaining high reliability. If one anticipates operating the converter at or close to the maximum loads specified in the derating curves, it is prudent to check actual operating temperatures in the application. Thermographic imaging is preferable; if this capability is not available, then thermocouples may be used. . The use of AWG #40 gauge thermocouple is recommended to ensure measurement accuracy. Careful routing of the thermocouple leads will further minimize measurement error. Refer to Fig. F for the optimum measuring thermocouple location. 

For each set of conditions, the maximum load current is defined as the lowest of: 

(i) The output current at which any MOSFET temperature does not exceed a maximum specified temperature (120°C) as indicated by the thermographic image, or 

(ii) The maximum current rating of the converter (10 A). 

During normal operation, derating curves with maximum FET temperature less than or equal to 120 °C should not be exceeded. Temperature on the PCB at the thermocouple location shown in Fig. F should not exceed 120 °C in order to operate inside the derating curves. 

## **Efficiency** 

Fig. x.3 shows the efficiency vs. load current plot for ambient temperature of 25 ºC, airflow rate of 200 LFM (1 m/s) and input voltages of 4.5 V, 5.0 V, and 5.5 V. Fig. x.4 is for input voltages of 3.0 V, 3.3 V, and 3.6 V , and for output voltages ≤ 2.5 V. 

## **Power Dissipation** 

Fig. 3.3V.4 shows the power dissipation vs. load current plot for Ta = 25 ºC, airflow rate of 200 LFM (1 m/s) with vertical mounting and input voltages of 4.5 V, 5.0 V, and 5.5 V, and output of  3.3 V. 

## **Ripple and Noise** 

The output voltage ripple waveform is measured at full rated load current. Note that all output voltage waveforms are measured across a 1 μF ceramic capacitor. 

The output voltage ripple and input reflected-ripple current waveforms are obtained using the test setup shown in Fig. G. 

**Fig. F: Location of the thermocouple for thermal testing.** 

**==> picture [223 x 43] intentionally omitted <==**

**----- Start of picture text -----**<br>
inductancesource 1   H CIN Y-Series  1   F CO<br>V source 4x47  ceramic  F ConverterDC-DC capacitorceramic  capacitorceramic 47   F Vout<br>capacitor |<br>**----- End of picture text -----**<br>


## **Thermal Derating** 

Load current vs. ambient temperature and airflow rates are given in Figs. x.1 and Figs. x.2 for maximum temperature of 120°C. Ambient temperature was varied between 25 °C and 85 °C, with airflow rates from 30 to 500 LFM (0.15 m/s to 2.5 m/s), and vertical and horizontal mountings. The airflow during the testing is parallel to the short axis of the converter, going from pin 1 and pin 6 to pins 2–5. 

**Fig. G: Test Setup for measuring input reflected-ripple currents, is and output voltage ripple.** 

MCD10193 Rev. 1.0, 21-Jun-10 

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_**YNS05S10 DC-DC Converter Data Sheet**_ _NS[Ll] changingS™.——————————————————————————————————the Shape ofPower _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ 

**==> picture [225 x 154] intentionally omitted <==**

**----- Start of picture text -----**<br>
12<br>10<br>8<br>6<br>500 LFM (2.5 m/s)<br>400 LFM (2.0 m/s)<br>4 300 LFM (1.5 m/s)<br>200 LFM (1.0 m/s)<br>100 LFM (0.5 m/s)<br>2   30 LFM (0.15 m/s)<br>0<br>20 30 40 50 60 70 80 90<br>Ambient Temperature [°C]<br>Load Current  [Adc]<br>**----- End of picture text -----**<br>


**Fig. 3.3V.1: Available load current vs. ambient temperature and airflow rates for Vout = 3.3 V converter mounted vertically with Vin = 5 V, and maximum MOSFET temperature**  **120**  **C.** 

**==> picture [221 x 153] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.00<br>0.95<br>0.90<br>0.85<br>5.5 V<br>5.0 V<br>0.80 4.5 V<br>0.75<br>0 2 4 6 8 10 12<br>Load Current [Adc]<br>Efficiency<br>**----- End of picture text -----**<br>


**Fig. 3.3V.3: Efficiency vs. load current and input voltage for Vout = 3.3 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25**  **C.** 

**==> picture [225 x 155] intentionally omitted <==**

**----- Start of picture text -----**<br>
12<br>10<br>8<br>6<br>500 LFM (2.5 m/s)<br>400 LFM (2.0 m/s)<br>4 300 LFM (1.5 m/s)<br>200 LFM (1.0 m/s)<br>100 LFM (0.5 m/s)<br>2   30 LFM (0.15 m/s)<br>0<br>20 30 40 50 60 70 80 90<br>Ambient Temperature [°C]<br>Load Current  [Adc]<br>**----- End of picture text -----**<br>


**Fig. 3.3V.2: Available load current vs. ambient temperature and airflow rates for Vout = 3.3 V converter mounted horizontally with Vin = 5 V, and maximum MOSFET temperature**  **120**  **C.** 

**==> picture [217 x 153] intentionally omitted <==**

**----- Start of picture text -----**<br>
2.5<br>2.0<br>1.5<br>1.0<br>5.5 V<br>5.0 V<br>0.5 4.5 V<br>0.0<br>0 2 4 6 8 10 12<br>Load Current [Adc]<br>Power Dissipation [W]<br>**----- End of picture text -----**<br>


**Fig. 3.3V.4: Power Loss vs. load current and input voltage for Vout = 3.3 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25**  **C.** 

MCD10193 Rev. 1.0, 21-Jun-10 

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_**YNS05S10 DC-DC Converter Data Sheet**_ S™N. _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ OL —_—————————— 

**Fig. 3.3V.5: Turn-on transient for Vout = 3.3 V with the application of Enable signal at full rated load current (resistive) and 47 μF external capacitance at Vin = 5 V. Top trace: Enable signal (2 V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 2 ms/div.** 

**Fig. 3.3V.7: Output voltage for Vout = 3.3 V to positive load current step change from 5 A to 10 A with slew rate of 5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 47 μF ceramic + 1 μF ceramic. Time scale: 20 μs/div.** 

**Fig. 3.3V.6: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with external capacitance 47 μF ceramic + 1 μF ceramic, and Vin = 5 V for Vout = 3.3 V. Time scale: 2 μs/div.** 

**Fig. 3.3V.8: Output voltage response for Vout = 3.3 V to negative load current step change from 10 A to 5 A with slew rate of -5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 47 μF ceramic + 1 μF ceramic. Time scale: 20 μs/div.** 

MCD10193 Rev. 1.0, 21-Jun-10 

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_**YNS05S10 DC-DC Converter Data Sheet**_ _NS[Ll] changingS™.——————————————————————————————————the Shape ofPower _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ 

**==> picture [225 x 154] intentionally omitted <==**

**----- Start of picture text -----**<br>
12<br>10<br>8<br>6<br>500 LFM (2.5 m/s)<br>400 LFM (2.0 m/s)<br>4 300 LFM (1.5 m/s)<br>200 LFM (1.0 m/s)<br>100 LFM (0.5 m/s)<br>2   30 LFM (0.15 m/s)<br>0<br>20 30 40 50 60 70 80 90<br>Ambient Temperature [°C]<br>Load Current  [Adc]<br>**----- End of picture text -----**<br>


**Fig. 2.5V.1: Available load current vs. ambient temperature and airflow rates for Vout = 2.5 V converter mounted vertically with Vin = 5 V, and maximum MOSFET temperature**  **120**  **C.** 

**==> picture [221 x 153] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.00<br>0.95<br>0.90<br>0.85<br>5.5 V<br>5.0 V<br>0.80 4.5 V<br>0.75<br>0 2 4 6 8 10 12<br>Load Current [Adc]<br>Efficiency<br>**----- End of picture text -----**<br>


**Fig. 2.5V.3: Efficiency vs. load current and input voltage for Vout = 2.5 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25**  **C.** 

**==> picture [225 x 154] intentionally omitted <==**

**----- Start of picture text -----**<br>
12<br>10<br>8<br>6<br>500 LFM (2.5 m/s)<br>400 LFM (2.0 m/s)<br>4 300 LFM (1.5 m/s)<br>200 LFM (1.0 m/s)<br>100 LFM (0.5 m/s)<br>2   30 LFM (0.15 m/s)<br>0<br>20 30 40 50 60 70 80 90<br>Ambient Temperature [°C]<br>Load Current  [Adc]<br>**----- End of picture text -----**<br>


**Fig. 2.5V.2: Available load current vs. ambient temperature and airflow rates for Vout = 2.5 V converter mounted horizontally with Vin = 5 V, and maximum MOSFET temperature**  **120**  **C.** 

**==> picture [221 x 153] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.00<br>0.95<br>0.90<br>0.85<br>3.6 V<br>3.3 V<br>0.80 3.0 V<br>0.75<br>0 2 4 6 8 10 12<br>Load Current [Adc]<br>Efficiency<br>**----- End of picture text -----**<br>


**Fig. 2.5V.4: Efficiency vs. load current and input voltage for Vout = 2.5 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25**  **C.** 

MCD10193 Rev. 1.0, 21-Jun-10 

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_**YNS05S10 DC-DC Converter Data Sheet**_ LN _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ NS_—changing the———————————— Shape ofPower 

**Fig. 2.5V.5: Turn-on transient for Vout = 2.5 V with the application of Enable signal at full rated load current (resistive) and 47 μF external capacitance at Vin = 5 V. Top trace: Enable signal (2 V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 2 ms/div.** 

**Fig. 2.5V.6: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with external capacitance 47 μF ceramic + 1 μF ceramic, and Vin = 5 V for Vout = 2.5 V. Time scale: 2 μs/div.** 

**==> picture [213 x 36] intentionally omitted <==**

**----- Start of picture text -----**<br>
“EEELELLLSE4<br>**----- End of picture text -----**<br>


**Fig. 2.5V.7: Output voltage response for Vout = 2.5 V to positive load current step change from 5 A to 10 A with slew rate of 5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 47 μF ceramic + 1 μF ceramic. Time scale: 20 μs/div.** 

**Fig. 2.5V.8: Output voltage response for Vout = 2.5 V to negative load current step change from 10 A to 5 A with slew rate of -5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 47 μF ceramic + 1 μF ceramic. Time scale: 20 μs/div.** 

MCD10193 Rev. 1.0, 21-Jun-10 

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_**YNS05S10 DC-DC Converter Data Sheet**_ _NS[Ll] changingS™.——————————————————————————————————the Shape ofPower _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ 

**==> picture [225 x 155] intentionally omitted <==**

**----- Start of picture text -----**<br>
12<br>10<br>8<br>6<br>500 LFM (2.5 m/s)<br>400 LFM (2.0 m/s)<br>4 300 LFM (1.5 m/s)<br>200 LFM (1.0 m/s)<br>100 LFM (0.5 m/s)<br>2   30 LFM (0.15 m/s)<br>0<br>20 30 40 50 60 70 80 90<br>Ambient Temperature [°C]<br>Load Current  [Adc]<br>**----- End of picture text -----**<br>


**Fig. 2.0V.1: Available load current vs. ambient temperature and airflow rates for Vout = 2.0 V converter mounted vertically with Vin = 5 V, and maximum MOSFET temperature**  **120**  **C.** 

**==> picture [223 x 155] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.00<br>0.95<br>0.90<br>0.85<br>5.5 V<br>0.80 5.0 V<br>4.5 V<br>0.75<br>0 2 4 6 8 10 12<br>Load Current [Adc]<br>Efficiency<br>**----- End of picture text -----**<br>


**Fig. 2.0V.3: Efficiency vs. load current and input voltage for Vout = 2.0 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25**  **C.** 

**==> picture [225 x 155] intentionally omitted <==**

**----- Start of picture text -----**<br>
12<br>10<br>8<br>6<br>500 LFM (2.5 m/s)<br>400 LFM (2.0 m/s)<br>4 300 LFM (1.5 m/s)<br>200 LFM (1.0 m/s)<br>100 LFM (0.5 m/s)<br>2   30 LFM (0.15 m/s)<br>0<br>20 30 40 50 60 70 80 90<br>Ambient Temperature [°C]<br>Load Current  [Adc]<br>**----- End of picture text -----**<br>


**Fig. 2.0V.2: Available load current vs. ambient temperature and airflow rates for Vout = 2.0 V converter mounted horizontally with Vin = 5 V, and maximum MOSFET temperature**  **120**  **C.** 

**==> picture [221 x 154] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.00<br>0.95<br>0.90<br>0.85<br>3.6 V<br>3.3 V<br>0.80 3.0 V<br>0.75<br>0 2 4 6 8 10 12<br>Load Current [Adc]<br>Efficiency<br>**----- End of picture text -----**<br>


**Fig. 2.0V.4: Efficiency vs. load current and input voltage for Vout = 2.0 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25**  **C.** 

MCD10193 Rev. 1.0, 21-Jun-10 

Page 13 of 25 

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_**YNS05S10 DC-DC Converter Data Sheet**_ S™ _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ mM] NS[Changing][the][ Shape] _—eee_———[ of][Power] 

**==> picture [209 x 29] intentionally omitted <==**

**----- Start of picture text -----**<br>
“COLE LL LE<br>**----- End of picture text -----**<br>


**Fig. 2.0V.5: Turn-on transient for Vout = 2.0 V with the application of Enable signal at full rated load current (resistive) and 47 μF external capacitance at Vin = 5 V. Top trace: Enable signal (2 V/div.); Bottom trace: output voltage (500 mV/div.); Time scale: 2 ms/div.** 

**Fig. 2.0V.7: Output voltage response for Vout = 2.0 V to positive load current step change from 5 A to 10 A with slew rate of 5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 47 μF ceramic + 1 μF ceramic. Time scale: 20 μs/div.** 

**Fig. 2.0V.6: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with external capacitance 47 μF ceramic + 1 μF ceramic, and Vin = 5 V for Vout = 2.0 V. Time scale: 2 μs/div.** 

**Fig. 2.0V.8: Output voltage response for Vout = 2.0 V to negative load current step change from 10 A to 5 A with slew rate of -5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 47 μF ceramic + 1 μF ceramic. Time scale: 20 μs/div.** 

MCD10193 Rev. 1.0, 21-Jun-10 

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_**YNS05S10 DC-DC Converter Data Sheet**_ _NS[Ll] changingS™.——————————————————————————————————the Shape ofPower _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ 

**==> picture [225 x 154] intentionally omitted <==**

**----- Start of picture text -----**<br>
12<br>10<br>8<br>6<br>500 LFM (2.5 m/s)<br>400 LFM (2.0 m/s)<br>4 300 LFM (1.5 m/s)<br>200 LFM (1.0 m/s)<br>100 LFM (0.5 m/s)<br>2   30 LFM (0.15 m/s)<br>0<br>20 30 40 50 60 70 80 90<br>Ambient Temperature [°C]<br>Load Current  [Adc]<br>**----- End of picture text -----**<br>


**Fig. 1.8V.1: Available load current vs. ambient temperature and airflow rates for Vout = 1.8 V converter mounted vertically with Vin = 5 V, and maximum MOSFET temperature**  **120**  **C.** 

**==> picture [221 x 153] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.00<br>0.95<br>0.90<br>0.85<br>5.5 V<br>5.0 V<br>0.80 4.5 V<br>0.75<br>0 2 4 6 8 10 12<br>Load Current [Adc]<br>Efficiency<br>**----- End of picture text -----**<br>


**Fig. 1.8V.3: Efficiency vs. load current and input voltage for Vout = 1.8 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25**  **C.** 

**==> picture [225 x 155] intentionally omitted <==**

**----- Start of picture text -----**<br>
12<br>10<br>8<br>6<br>500 LFM (2.5 m/s)<br>400 LFM (2.0 m/s)<br>4 300 LFM (1.5 m/s)<br>200 LFM (1.0 m/s)<br>100 LFM (0.5 m/s)<br>2   30 LFM (0.15 m/s)<br>0<br>20 30 40 50 60 70 80 90<br>Ambient Temperature [°C]<br>Load Current  [Adc]<br>**----- End of picture text -----**<br>


**Fig. 1.8V.2: Available load current vs. ambient temperature and airflow rates for Vout = 1.8 V converter mounted horizontally with Vin = 5 V, and maximum MOSFET temperature**  **120**  **C.** 

**==> picture [221 x 153] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.00<br>0.95<br>0.90<br>0.85<br>3.6 V<br>3.3 V<br>0.80 3.0 V<br>0.75<br>0 2 4 6 8 10 12<br>Load Current [Adc]<br>Efficiency<br>**----- End of picture text -----**<br>


**Fig. 1.8V.4: Efficiency vs. load current and input voltage for Vout = 1.8 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25**  **C.** 

MCD10193 Rev. 1.0, 21-Jun-10 

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_**YNS05S10 DC-DC Converter Data Sheet**_ S™N. _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ NSPOWES-changing the 08 Shape eO—$HHT ofPower 

**Fig. 1.8V.5: Turn-on transient for Vout = 1.8 V with the application of Enable signal at full rated load current (resistive) and 47 μF external capacitance at Vin = 5 V. Top trace: Enable signal (2 V/div.); Bottom trace: output voltage (500 mV/div.); Time scale: 2 ms/div.** 

**Fig. 1.8V.7: Output voltage response for Vout = 1.8 V to positive load current step change from 5 A to 10 A with slew rate of 5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 47 μF ceramic + 1 μF ceramic. Time scale: 20 μs/div.** 

**Fig. 1.8V.6: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with external capacitance 47 μF ceramic + 1 μF ceramic, and Vin = 5 V for Vout = 1.8 V. Time scale: 2 μs/div.** 

**Fig. 1.8V.8: Output voltage response for Vout = 1.8 V to negative load current step change from 10 A to 5 A with slew rate of -5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 47 μF ceramic + 1 μF ceramic. Time scale: 20 μs/div.** 

MCD10193 Rev. 1.0, 21-Jun-10 

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_**YNS05S10 DC-DC Converter Data Sheet**_ _NS[Ll] changingS™.——————————————————————————————————the Shape ofPower _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ 

**==> picture [225 x 154] intentionally omitted <==**

**----- Start of picture text -----**<br>
12<br>10<br>8<br>6<br>500 LFM (2.5 m/s)<br>400 LFM (2.0 m/s)<br>4 300 LFM (1.5 m/s)<br>200 LFM (1.0 m/s)<br>100 LFM (0.5 m/s)<br>2   30 LFM (0.15 m/s)<br>0<br>20 30 40 50 60 70 80 90<br>Ambient Temperature [°C]<br>Load Current  [Adc]<br>**----- End of picture text -----**<br>


**Fig. 1.5V.1: Available load current vs. ambient temperature and airflow rates for Vout = 1.5 V converter mounted vertically with Vin = 5 V, and maximum MOSFET temperature**  **120**  **C.** 

**==> picture [221 x 153] intentionally omitted <==**

**----- Start of picture text -----**<br>
0.95<br>0.90<br>0.85<br>5.5 V<br>0.80 5.0 V<br>4.5 V<br>0.75<br>0 2 4 6 8 10 12<br>Load Current [Adc]<br>Efficiency<br>**----- End of picture text -----**<br>


**Fig. 1.5V.3: Efficiency vs. load current and input voltage for Vout = 1.5 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25**  **C.** 

**==> picture [225 x 154] intentionally omitted <==**

**----- Start of picture text -----**<br>
12<br>10<br>8<br>6<br>500 LFM (2.5 m/s)<br>400 LFM (2.0 m/s)<br>4 300 LFM (1.5 m/s)<br>200 LFM (1.0 m/s)<br>100 LFM (0.5 m/s)<br>2   30 LFM (0.15 m/s)<br>0<br>20 30 40 50 60 70 80 90<br>Ambient Temperature [°C]<br>Load Current  [Adc]<br>**----- End of picture text -----**<br>


**Fig. 1.5V.2: Available load current vs. ambient temperature and airflow rates for Vout = 1.5 V converter mounted horizontally with Vin = 5 V, and maximum MOSFET temperature**  **120**  **C.** 

**==> picture [221 x 153] intentionally omitted <==**

**----- Start of picture text -----**<br>
0.95<br>0.90<br>0.85<br>3.6 V<br>0.80 3.3 V<br>3.0 V<br>0.75<br>0 2 4 6 8 10 12<br>Load Current [Adc]<br>Efficiency<br>**----- End of picture text -----**<br>


**Fig. 1.5V.4: Efficiency vs. load current and input voltage for Vout = 1.5 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25**  **C.** 

MCD10193 Rev. 1.0, 21-Jun-10 

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_**YNS05S10 DC-DC Converter Data Sheet**_ S™N. _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ NSPOWES-changing the 08 Shape eO—$HHT ofPower 

**Fig. 1.5V.5: Turn-on transient for Vout = 1.5 V with the application of Enable signal at full rated load current (resistive) and 47 μF external capacitance at Vin = 5 V. Top trace: Enable signal (2 V/div.); Bottom trace: output voltage (500 mV/div.); Time scale: 2 ms/div.** 

**Fig. 1.5V.7: Output voltage response for Vout = 1.5 V to positive load current step change from 5 A to 10 A with slew rate of 5 A/μs at Vin = 5V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 47 μF ceramic + 1 μF ceramic. Time scale: 20 μs/div.** 

**Fig. 1.5V.6: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with external capacitance 47 μF ceramic + 1 μF ceramic, and Vin = 5 V for Vout = 1.5 V. Time scale: 2 μs/div.** 

**Fig. 1.5V.8: Output voltage response for Vout = 1.5 V to negative load current step change from 10 A to 5 A with slew rate of -5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 47 μF ceramic + 1 μF ceramic. Time scale: 20 μs/div.** 

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_**YNS05S10 DC-DC Converter Data Sheet**_ _NS[Ll] changingS™.——————————————————————————————————the Shape ofPower _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ 

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**----- Start of picture text -----**<br>
12<br>10<br>8<br>6<br>500 LFM (2.5 m/s)<br>400 LFM (2.0 m/s)<br>4 300 LFM (1.5 m/s)<br>200 LFM (1.0 m/s)<br>100 LFM (0.5 m/s)<br>2   30 LFM (0.15 m/s)<br>0<br>20 30 40 50 60 70 80 90<br>Ambient Temperature [°C]<br>Load Current  [Adc]<br>**----- End of picture text -----**<br>


**Fig. 1.2V.1: Available load current vs. ambient temperature and airflow rates for Vout = 1.2 V converter mounted vertically with Vin = 5 V, and maximum MOSFET temperature**  **120**  **C.** 

**==> picture [221 x 153] intentionally omitted <==**

**----- Start of picture text -----**<br>
0.95<br>0.90<br>0.85<br>0.80<br>5.5 V<br>5.0 V<br>0.75 4.5 V<br>0.70<br>0 2 4 6 8 10 12<br>Load Current [Adc]<br>Efficiency<br>**----- End of picture text -----**<br>


**Fig. 1.2V.3: Efficiency vs. load current and input voltage for Vout = 1.2 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25**  **C.** 

**==> picture [225 x 155] intentionally omitted <==**

**----- Start of picture text -----**<br>
12<br>10<br>8<br>6<br>500 LFM (2.5 m/s)<br>400 LFM (2.0 m/s)<br>4 300 LFM (1.5 m/s)<br>200 LFM (1.0 m/s)<br>100 LFM (0.5 m/s)<br>2   30 LFM (0.15 m/s)<br>0<br>20 30 40 50 60 70 80 90<br>Ambient Temperature [°C]<br>Load Current  [Adc]<br>**----- End of picture text -----**<br>


**Fig. 1.2V.2: Available load current vs. ambient temperature and airflow rates for Vout = 1.2 V converter mounted horizontally with Vin = 5 V, and maximum MOSFET temperature**  **120**  **C.** 

**==> picture [221 x 153] intentionally omitted <==**

**----- Start of picture text -----**<br>
0.95<br>0.90<br>0.85<br>0.80<br>3.6 V<br>3.3 V<br>0.75 3.0 V<br>0.70<br>0 2 4 6 8 10 12<br>Load Current [Adc]<br>Efficiency<br>**----- End of picture text -----**<br>


**Fig. 1.2V.4: Efficiency vs. load current and input voltage for Vout = 1.2 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25**  **C.** 

MCD10193 Rev. 1.0, 21-Jun-10 

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_**YNS05S10 DC-DC Converter Data Sheet**_ _——_—_——————S™ _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ oo 

**==> picture [209 x 48] intentionally omitted <==**

**----- Start of picture text -----**<br>
TITEL<br>TTT Eo<br>**----- End of picture text -----**<br>


**Fig. 1.2V.5: Turn-on transient for Vout = 1.2 V with the application of Enable signal at full rated load current (resistive) and 47 μF external capacitance at Vin = 5 V. Top trace: Enable signal (2 V/div.); Bottom trace: output voltage (500 mV/div.); Time scale: 2 ms/div.** 

**Fig. 1.2V.6: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with external capacitance 47 μF ceramic + 1 μF ceramic, and Vin = 5 V for Vout = 1.2 V. Time scale: 2 μs/div.** 

**==> picture [209 x 30] intentionally omitted <==**

**----- Start of picture text -----**<br>
“TTT TETTy ey<br>**----- End of picture text -----**<br>


**Fig. 1.2V.6: Output voltage response for Vout = 1.2 V to positive load current step change from 5 A to 10 A with slew rate of 5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 47 μF ceramic + 1 μF ceramic. Time scale: 20 μs/div.** 

**Fig. 1.2V.8: Output voltage response for Vout = 1.2 V to negative load current step change from 10 A to 5 A with slew rate of -5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 47 μF ceramic + 1 μF ceramic. Time scale: 20 μs/div.** 

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_**YNS05S10 DC-DC Converter Data Sheet**_ _NS[Ll] changingS™.——————————————————————————————————the Shape ofPower _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ 

**==> picture [225 x 154] intentionally omitted <==**

**----- Start of picture text -----**<br>
12<br>10<br>8<br>6<br>500 LFM (2.5 m/s)<br>400 LFM (2.0 m/s)<br>4 300 LFM (1.5 m/s)<br>200 LFM (1.0 m/s)<br>100 LFM (0.5 m/s)<br>2   30 LFM (0.15 m/s)<br>0<br>20 30 40 50 60 70 80 90<br>Ambient Temperature [°C]<br>Load Current  [Adc]<br>**----- End of picture text -----**<br>


**Fig. 1.0V.1: Available load current vs. ambient temperature and airflow rates for Vout = 1.0 V converter mounted vertically with Vin = 5 V, and maximum MOSFET temperature**  **120**  **C.** 

**==> picture [221 x 153] intentionally omitted <==**

**----- Start of picture text -----**<br>
0.95<br>0.90<br>0.85<br>0.80<br>5.5 V<br>5.0 V<br>0.75 4.5 V<br>0.70<br>0 2 4 6 8 10 12<br>Load Current [Adc]<br>Efficiency<br>**----- End of picture text -----**<br>


**Fig. 1.0V.3: Efficiency vs. load current and input voltage for Vout = 1.0 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25**  **C.** 

**==> picture [225 x 154] intentionally omitted <==**

**----- Start of picture text -----**<br>
12<br>10<br>8<br>6<br>500 LFM (2.5 m/s)<br>400 LFM (2.0 m/s)<br>4 300 LFM (1.5 m/s)<br>200 LFM (1.0 m/s)<br>100 LFM (0.5 m/s)<br>2   30 LFM (0.15 m/s)<br>0<br>20 30 40 50 60 70 80 90<br>Ambient Temperature [°C]<br>Load Current  [Adc]<br>**----- End of picture text -----**<br>


**Fig. 1.0V.2: Available load current vs. ambient temperature and airflow rates for Vout = 1.0 V converter mounted horizontally with Vin = 5 V, and maximum MOSFET temperature**  **120**  **C.** 

**==> picture [221 x 153] intentionally omitted <==**

**----- Start of picture text -----**<br>
0.95<br>0.90<br>0.85<br>0.80<br>3.6 V<br>3.3 V<br>0.75 3.0 V<br>0.70<br>0 2 4 6 8 10 12<br>Load Current [Adc]<br>Efficiency<br>**----- End of picture text -----**<br>


**Fig. 1.0V.4: Efficiency vs. load current and input voltage for Vout = 1.0 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25**  **C.** 

MCD10193 Rev. 1.0, 21-Jun-10 

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_**YNS05S10 DC-DC Converter Data Sheet 3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ UE  ——————————————————e 

**Fig. 1.0V.5: Turn-on transient for Vout = 1.0 V with the application of Enable signal at full rated load current (resistive) and 47 μF external capacitance at Vin = 5 V. Top trace: Enable signal (2 V/div.); Bottom trace: output voltage (500 mV/div.); Time scale: 2 ms/div.** 

**Fig. 1.0V.7: Output voltage response Vout = 1.0 V to positive load current step change from 5 A to 10 A with slew rate of 5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 47 μF ceramic + 1 μF ceramic. Time scale: 20 μs/div.** 

**Fig. 1.0V.6: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with external capacitance 47 μF ceramic + 1 μF ceramic, and Vin = 5 V for Vout = 1.0 V. Time scale: 2 μs/div.** 

**Fig. 1.0V.8: Output voltage response for Vout = 1.0 V to negative load current step change from 10 A to 5 A with slew rate of -5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 47 μF ceramic + 1 μF ceramic. Time scale: 20 μs/div.** 

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_**YNS05S10 DC-DC Converter Data Sheet**_ _NS[Ll] changingS™.——————————————————————————————————the Shape ofPower _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ 

**==> picture [225 x 155] intentionally omitted <==**

**----- Start of picture text -----**<br>
12<br>10<br>8<br>6<br>500 LFM (2.5 m/s)<br>400 LFM (2.0 m/s)<br>4 300 LFM (1.5 m/s)<br>200 LFM (1.0 m/s)<br>100 LFM (0.5 m/s)<br>2   30 LFM (0.15 m/s)<br>0<br>20 30 40 50 60 70 80 90<br>Ambient Temperature [°C]<br>Load Current  [Adc]<br>**----- End of picture text -----**<br>


**Fig. 0.7525V.1: Available load current vs. ambient temperature and airflow rates for Vout = 0.7525 V converter mounted vertically with Vin = 5 V, and maximum MOSFET temperature**  **120**  **C.** 

**==> picture [221 x 153] intentionally omitted <==**

**----- Start of picture text -----**<br>
0.90<br>0.85<br>0.80<br>5.5 V<br>0.75 5.0 V<br>4.5 V<br>0.70<br>0 2 4 6 8 10 12<br>Load Current [Adc]<br>Efficiency<br>**----- End of picture text -----**<br>


**Fig. 0.7525V.3: Efficiency vs. load current and input voltage for Vout = 0.7525 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25**  **C.** 

**==> picture [225 x 155] intentionally omitted <==**

**----- Start of picture text -----**<br>
12<br>10<br>8<br>6<br>500 LFM (2.5 m/s)<br>400 LFM (2.0 m/s)<br>4 300 LFM (1.5 m/s)<br>200 LFM (1.0 m/s)<br>100 LFM (0.5 m/s)<br>2   30 LFM (0.15 m/s)<br>0<br>20 30 40 50 60 70 80 90<br>Ambient Temperature [°C]<br>Load Current  [Adc]<br>**----- End of picture text -----**<br>


**Fig. 0.7525V.2: Available load current vs. ambient temperature and airflow rates for Vout = 0.7525 V converter mounted horizontally with Vin = 5 V, and maximum MOSFET temperature**  **120**  **C.** 

**==> picture [221 x 153] intentionally omitted <==**

**----- Start of picture text -----**<br>
0.90<br>0.85<br>0.80<br>3.6 V<br>0.75 3.3 V<br>3.0 V<br>0.70<br>0 2 4 6 8 10 12<br>Load Current [Adc]<br>Efficiency<br>**----- End of picture text -----**<br>


**Fig. 0.7525V.4: Efficiency vs. load current and input voltage for Vout = 0.7525 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25**  **C.** 

MCD10193 Rev. 1.0, 21-Jun-10 

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_**YNS05S10 DC-DC Converter Data Sheet**_ SN. _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ NSOOchanging—————————————the Shape ofPower 

**Fig. 0.7525V.5: Turn-on transient for Vout = 0.7525 V with the application of Enable signal at full rated load current (resistive) and 47 μF external capacitance at Vin = 5 V. Top trace: Enable signal (2 V/div.); Bottom trace: output voltage (200 mV/div.); Time scale: 2 ms/div.** 

**Fig. 0.7525V.6: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with external capacitance 47 μF ceramic + 1 μF ceramic, and Vin = 5 V for Vout = 0.7525 V. Time scale: 2 μs/div.** 

MCD10193 Rev. 1.0, 21-Jun-10 

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_**YNS05S10 DC-DC Converter Data Sheet**_ S™. _**3.0-5.5 VDC Input; 0.7525-3.63 VDC Programmable @ 10 A**_ OL ————————, 

## **Physical Information** 

**YNS05S Pinout (Surface-mount)** 

**==> picture [357 x 207] intentionally omitted <==**

**----- Start of picture text -----**<br>
Pad/Pin Connections<br>Pad/Pin #  Function<br>1  ON/OFF<br>2  SENSE<br>3  TRIM<br>4  Vout<br>5  GND<br>2 3 4 5 6  Vin<br>==<br>1(*) 6<br>TOP VIEW ! YNS05S Platform Notes<br>(*) PIN # 1 ROTATED 90°  All dimensions are in inches [mm]<br> Connector Material: Copper<br>SIDE VIEW  Connector Finish: Gold over Nickel<br>i  Converter Weight: 0.22 oz [6.12 g]<br>ee  Converter Height: 0.327” Max., 0.301” Min.<br>a  Recommended Surface-mount Pads:<br>7 |         Min.  0.080” X 0.112” [2.03 x 2.84]<br>**----- End of picture text -----**<br>


## **Converter Part Numbering Scheme** 

|**Product**<br>**Series**|**Input**<br>**Voltage **<br>**Mounting**|**Mounting**<br>**Scheme**|**Rated Load**<br>**Current**||**Enable Logic**|**Environmental**|
|---|---|---|---|---|---|---|
|**YNS**|**05**|**S**|**10**|–|**0**||
|Y-Series<br>3.0 to 5.5 VDC|3.0 to 5.5 VDC<br>S|SSurface-<br>mount<br>(0.7525 to 3.63 VDC)|10 A<br>(0.7525 to 3.63 VDC)||0Standard<br>(Positive Logic)<br>DOpposite of<br>Standard<br>(Negative Logic)|No SuffixRoHS<br>lead-solder-exempt<br>compliant1<br> GRoHS<br>compliant for all six<br>substances|
|The example above describes P/N YNS05S10-0: 3.0 to 5.5 VDC input, surface mount, 10 A at 0.7525 to 3.63 VDC output,<br>standard enable logic, and Eutectic Tin/Lead solder. Please consult factory for the complete list of available options.|||||||



## _**The YNS05S10 is not recommended for new designs and has been replaced by the YS05S10. Please refer to the YS05S10 data sheet for new product specifications.**_ 

1 The solder exemption refers to all the restricted materials except lead in solder. 

NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written consent of the respective divisional president of Power-One, Inc. 

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. 

MCD10193 Rev. 1.0, 21-Jun-10 

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