MPDRX303S,304S Application 1 DC-DC Converter Application Manual MPDRX303S,MPDRX304S 1. Features ･Ultra high-speed response is realized by using original ripple detecting control. ･Up to 26A output current, non-isolated POL. ･Wide adjustable output voltage range by connecting external resistance (0.8V to 3.63V). ･Wide operating temperature（-40 oC to +85 oC）. ･UVLO function, ON/OFF function, Output voltage sense function, Over-current function and, PowerGood signal output function are built in. 2. Appearance, Dimensions 26.8±0.2 20 ( )…reference value P=2.54 ±0.2mm P Tolerance is not accumulated. P P 11 ④ 10 P ③ P 26.8±0.2 P P PT□ ② P P ① P P P P P P P P P M 1 7.0max. Marking (1) Pin No.1 Marking / MFG ID (2) Parts No. PT□ ① ① E：MPDRX303S D：MPDRX304S (3) Lot No. □□□ ②③④ ②Production factory Mark ③Production Year ④Production Month（1,2,3,…9,O,N,D） Note: 1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 2009.8.20 MPDRX303S,304S Application 2 Pin Number and Function Pin No. Symbol 1 SENSE 2,3,4 Vout 5,6,7,8,13,14,15 GND 9, FT 10, VAR 11,12 Vin 17, SS 18 N.C. 19 POW-GOOD1 20 POW-GOOD2 16 ON/OFF Function Output voltage sense Output GND Output trim Output voltage adjustment Input Soft start This pin must be left open. Power Good Power Good Remote ON/OFF 3. Block Diagram 11,12 Vin Vout 2,3,4 SENSE 1 GND 13,14,15 5,6,7,8 GND 16 17 18 VAR ON/OFF SS Control unit N.C. 10 FT 9 19 POW-GOOD1 20 POW-GOOD2 4. Test Circuit 11,12 Vin C1,C2 16 17 18 19 20 ON/OFF MPDRX30*S S S NC PG1 5,6,7,8, PG2 GND 13,14,15 Open= ON Short= OFF SENSE 1 Vout 2,3,4 VAR 10 FT 9 RVAR RL C3,C4 Short: Vo ≧0.95 V Open: Vo <0.95 V （Ceramic Capacitor） C1,C2：22µF／25V×2 C3,C4：100µF／6.3V×2 (Ceramic Capacitor） Please make sure to place C1, C2,C3 amd C4 nearby input and output terminal of DC-DC converter. Note: 1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 2009.8.20 MPDRX303S,304S Application 3 5. Characteristics 5. 1 Electrical Characteristics (Ta=25 oC) (1) MPDRX303S Value Item Condition Symbol Unit Min. Typ. Max. 6.2 9.6 13.2 V Input Voltage Range Vin Rising UVLO Threshold UVLOr Vin Increasing - 5.25 - V Falling UVLO Threshold UVLOf Vin Decreasing - 5.0 - V Output Voltage Adjustable Range Vout 1.6 - 3.63 V Output Voltage Tolerance Vo tol -2.0 - +2.0 %Vo Output Current Iout 0 - 26 A Ripple Voltage Vrpl - 20 100 mV(pp) Vout=3.3V - 91 - Vout=2.5V - 88 - Vout=1.8V - 86 - Vin =9.6V, Vout=3.3V - 600 - Vin =9.6V, Vout=1.8V - 350 - PWGL Power Good low threshold - 0.87Vo - PWGH Power Good high threshold - 1.13Vo - Efficiency Operating Frequency Power Good EFF FT=Short Over Vin, Io, Temperature Range Vin=6.2∼13.2V Rset=1% tolerance, FT=Short See the thermal derating curve in section 5.2. Vout =3.3V, Iout=0∼26A BW=20MHz, Cout=200µF Vin =9.6V, Iout=26A Frq % kHz V ON/OFF pin High Voltage VIH ON/OFF pin Low Voltage VIL Short Circuit Protection SCP External Input Capacitor Cin External Output Capacitor Cout Ramp Rate Tr Rising Overshoot Vover Startup Delay Td RC Startup Delay Trcd ON/OFF pin is pulled up to Vin inside of the DC-DC converter. If ON/OFF pin is left open, the DC-DC converter shall be “ON”. This pin will be pulled down to GND inside the DC-DC converter when UVLO events occur. Please do NOT connect this pin to power supply with low impedance line, so as not to damage the converter. If ON/OFF pin is connected to GND, the DC-DC Converter OFF 0 1.0 V shall be “OFF”. If output is shorted to GND, DC-DC converter will shut down. After reject the 26 46 A abnormal mode , DC-DC converter will restart by re-inputting Vin or toggling ON/OFFpin. When input voltage is ideal voltage 40 5000 µF source When input voltage is ideal voltage source Vo=10%∼90%, SS=Open ON/OFF High : Vin Low→ High Vo=10% SS= Open Vin High : ON/OFF Low → High/Open Vo=10% 200 - 2000 µF 1 2 5 msec - 0 +10 % 0.1 0.5 2 msec 0.1 0.4 2 msec Note: 1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 2009.8.20 MPDRX303S,304S Application 4 (2) MPDRX304S Value Item Condition Symbol Unit Min. Typ. Max. 6.2 9.6 13.2 V Input Voltage Range Vin Rising UVLO Threshold UVLOr Vin Increasing - 5.25 - V Falling UVLO Threshold UVLOf Vin Decreasing - 5.0 - V Output Voltage Adjustable Range FT=Open 0.8 - 0.95 Vout FT=Short 0.95 - 1.65 Output Voltage Tolerance Vo tol -2.5 - +2.5 %Vo Output Current Iout 0 - 26 A Ripple Voltage Vrpl - 15 100 mV(pp) Vout=1.5V - 85 - Vout=1.2V - 83 - Vout=0.8V - 79 - Vin =9.6V, Vout=1.5V - 550 - Vin =9.6V, Vout=0.8V - 320 - PWGL Power Good low threshold - 0.87Vo - PWGH Power Good high threshold - 1.13Vo - Efficiency Operating Frequency Power Good EFF V Over Vin, Io, Temperature Range Vin=6.2∼13.2V Rset=1% tolerance See the thermal derating curve in section 5.2. Vout =1.2V, Iout=0∼26A BW=20MHz, Cout=200µF Vin =9.6V, Iout=26A Frq % kHz V ON/OFF pin High Voltage VIH ON/OFF pin Low Voltage VIL Short Circuit Protection SCP External Input Capacitor Cin External Output Capacitor Cout Ramp Rate Tr Rising Overshoot Vover Startup Delay Td ON/OFF Startup Delay Trcd ON/OFF pin is pulled up to Vin inside of the DC-DC converter. If ON/OFF pin is left open, the DC-DC converter shall be “ON”. This pin will be pulled down to GND inside the DC-DC converter when UVLO events occur. Please do NOT connect this pin to power supply with low impedance line, so as not to damage the converter. If ON/OFF pin is connected to GND, the DC-DC Converter OFF 0 1.0 V shall be “OFF”. If output is shorted to GND, DC-DC converter will shut down. After reject the abnormal mode , DC-DC converter will 26 46 A restart by re-inputting Vin or toggling ON/OFF pin. When input voltage is ideal voltage 40 5000 µF source When input voltage is ideal voltage source 200 - 2000 µF 1 2 5 msec - 0 +10 % ON/OFF High : Vin Low→ High Vo=10%, SS= Open 0.1 0.5 2 msec Vin High : ON/OFF Low → High/Open Vo=10% 0.1 0.4 2 msec Vo=10%∼90%, SS=Open ※This DC-DC converter thermally shuts down when temperature of a control IC reaches to 180 °C typically. Note: 1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 2009.8.20 MPDRX303S,304S Application 5 5. 2 Thermal Derating MPDRX304S (Vin=6.2∼12V、Vout=0.8∼1.65V Airflow:0∼3.0m/s) 28 26 24 26 24 22 20 18 16 14 12 10 8 6 4 2 0 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.2 m/s 0m/s Iout［A］ Iou t［A ］ MPDRX3 03S (Vin =6.2 ∼1 2V、Vout=1 .6∼3.6 3V、 Airflow：0∼3.0 ｍ/ｓ) 22 20 18 16 3.0m /s 2.0m /s 1.5m /s 1.0m /s 0.2m /s 14 12 10 0m /s 8 6 4 2 0 20 30 40 50 60 Ta[℃] 70 80 20 30 40 50 60 70 80 Ta [℃] The above derating limits apply to this product soldered directly to 101.6*180mm*1.6mm PCB (6 layer). Any adjacent parts of high temperature may cause overheating. For reliable operation, please ensure that the FET temperature of this product is maintained below 120°C and the inductor temperature is below 106°C. 6. Pin Description 6.1. Adjusting the Output Voltage The output voltage can be adjusted by connecting resistors between VAR-pin(10Pin) to GND-pin. The following equation gives the required external-resistor value to adjust the output voltage to Vo-adj. It is highly recommended that evaluation of the characteristics of this DC-DC converter’s operation under your board conditions be thoroughly conducted. In case output voltage is used more than 0.95V, please connect FT-pin(9pin) to GND. Internal Circuit MPDRX303S ①MPDRX303S Vout MPDRX304S VAR pin 303S：1.8 kΩ 304S：5.1kΩ (FT-pin： SHORT to GND) 5440 RVAR＝ ②MPDRX304S (a)0.8≦ Vout ＜0.95V Error amp FT pin [Ω] −1800 Vo-adj[V]×1.002−1.5[V] 6.8 kΩ RVAR＝ (FT-pin：OPEN) 5440 −5100 [Ω] Vo-adj[V]×1.002−0.8[V] (b)0.95≦ Vout ≦1.65V RVAR＝ (FT-pin：SHORT to GND) 5440 −5100 [Ω] Vo-adj[V]×1.002−0.95[V] Note: 1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 2009.8.20 MPDRX303S,304S Application 6 <RVAR calculation example> MPDRX303S Vo-adj [V] 3.63 3.3 2.5 1.8 1.6 MPDRX304S RVAR計算結果[Ω] Calculated RVAR[Ω] 745 1211 3613 16118 50913 FT pin (8pin) Vo-adj [V] 1.65 1.5 1.2 1.0 0.95 0.9 0.8 Short to GND Short to GND Short to GND Short to GND Short to GND RVAR計算結果[Ω] Calculated RVAR[Ω] FT pin (8pin) 2635 4737 16453 99515 2858058 48338 3394900 Short to GND Short to GND Short to GND Short to GND Short to GND Open Open 6. 2 ON/OFF Control ON/OFF function Using the ON/OFF feature, the operation of this product can be disabled without removal of the input voltage. Sequencing of a power supply system and power-saving control can be easily achieved using this function. ON/OFF Control Operation When ON/OFF-pin(16pin) is left open When ON/OFF-pin(16pin) is connected to GND …… …… Output Voltage =ON Output Voltage=OFF MPDRX30*S example GND ON/OFF or 6. 3 Output Voltage Sensing By connecting the SENSE-pin to the load, the output voltage drop due to the PCB wiring may be compensated for (within 10cm). Vout MPDRX30*S SENSE Load GND Please do NOT connect SENSE-pin to the output of LC filter that is set to the Vout line. When using this way, this product will not operate properly. Vout MPDRX30*S SENSE Load GND Note: 1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 2009.8.20 MPDRX303S,304S Application 7 6.4. Input External capacitor It is recommended to connect a low-impedance electrolytic capacitor of 40µF or more at Vin terminal. Smaller input capacitor may leads to an unstable operation of this product caused by input voltage fluctuation. Please check the proper operation of it on your product when smaller input capacitor is used. Using ceramic capacitors as input capacitor may cause an increase of output voltage, because input ripple current flows through the external input capacitor and wiring resistance. This phenomenon is affected by the position of external capacitors, the value of external capacitors and voltage difference between Vin and Vout. Using low-impedance electrolytic capacitor will ease this problem. Please check the proper operation of it on your product when ceramic input capacitor is used. MPDRX30*S Vin Cin Ripple current Vout Rw×Irpl appears as additional output ripple voltage. Rw Wiring resistance 6.5. Output External capacitor Ceramic capacitors are recommended as output external capacitor. Using ceramic capacitors, small output variation and small ripple voltage are realized. Output capacitor should be within 200µF to 2000µF. Output capacitor shall be placed near the output terminal. When using plural capacitors, please make sure to place a capacitor of at least 200µF near the output terminal, and place other capacitors near the load. When using LC output filter, please make sure to place a capacitor of at least 200µF near the output terminal. Note: 1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 2009.8.20 MPDRX303S,304S Application 8 7. Typical Characteristics Data 7. 1 Load Transient Response Our original ripple-detective control method achieves much better load transient responses. Vin=9.6V, Vo=2.5V(MPDRX303S,Fig.7-1a) , 1.2V(MPDRX304S,Fig.7-1b) Io=0A ->10A, di/dt=20A/us, Cout=200uF(Ceramic), Ta=25 oC Vout 50mV/div Vout 50mV/div 10us/div 10us/div Iout Iout Fig.7-1a. Load Transient Response (MPDRX301S) Fig.7-1b.Load Transient Response (MPDRX302S) 7. 2 Output Impedance characteristics Our original ripple-detective control method achieves very low output impedance in wide frequency range. Conventional PMW Product's Output Impedance MPDRX303S/304S Output Impedance 100 40 80 Zo [mohm] Zo[mOhm] 50 30 20 10 60 40 20 0 0.1 1 10 100 Frquency[kHz] Fig.7-2-1. Output Impedance of MPDRX303S/304S 0 0.01 0.1 1 10 100 Frequency [kHz] Fig.7-2-2. Output Impedance of conventional product Note: 1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 2009.8.20 MPDRX303S,304S Application 9 7. 3 Other electrical characteristics 7. 3. 1 Vout=3.3V (MPDRX303S) （Ta=25°C, Cin= GRM32ER71C226KE15L×2, Cout=GRM32EB30J107ME16L×2, Rtrim=1211Ω） Efficiency 3.399 95 3.366 92 E fficien cy（ ％ ） Vout （V） Load Reguration 3.333 3.300 3.267 89 86 83 3.234 3.201 80 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 Iout（Ａ） Vin：5.6V Vin：9.6V Iout（Ａ） Vin：14V Fig.7-3-1. Output Voltage v.s. Output Current Vin：5.6V Vin：9.6V Vin：14V Fig.7-3-2. Efficiency v.s. Output Current Ripple noise voltage R ipple nois e v olta g e (m V p-p) 25 20 15 10 5 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 Iout（Ａ） Vin：5.6V Vin：9.6V Vin：14V Fig.7-3-3. Ripple Voltage v. s. Output Current Note: 1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 2009.8.20 MPDRX303S,304S Application 10 7. 3. 2 Vout=2.5V (MPDRX303S) （Ta=25 oC, Cin= GRM32ER71C226KE15L×2, Cout=GRM32EB30J107ME16L×2, RVAR=3613Ω） Load Reguration Efficiency 95 2.550 92 E fficien cy（ ％ ） 2.575 V o u t（ V ） 2.525 2.500 2.475 89 86 83 2.450 2.425 80 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 Iout（Ａ） Vin：5.6V Vin：9.6V Iout（Ａ） Vin：14V Fig.7-3-4. Output Voltage v.s. Output Current Vin：5.6V Vin：9.6V Vin：14V Fig.7-3-5. Efficiency v.s. Output Current Ripple noise voltage R ipple nois e v olta g e (m V p-p) 25 20 15 10 5 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 Iout（Ａ） Vin：5.6V Vin：9.6V Vin：14V Fig.7-3-6. Ripple Voltage v.s. Output Current Note: 1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 2009.8.20 MPDRX303S,304S Application 11 7. 3. 3 Vout=1.8V (MPDRX303S) （Ta=25 oC, Cin= GRM32ER71C226KE15L×2, Cout=GRM32EB30J107ME16L×2, RVAR=16118Ω） Load Reguration Efficiency 95 1.836 92 E fficien cy（ ％ ） 1.854 V o u t（ V ） 1.818 1.800 1.782 89 86 83 1.764 1.746 80 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 Iout（Ａ） Vin：5.6V Vin：9.6V Iout（Ａ） Vin：14V Fig.7-3-7. Output Voltage v.s. Output Current Vin：5.6V Vin：9.6V Vin：14V Fig.7-3-8. Efficiency v.s. Output Current Ripple noise voltage R ipple nois e v olta g e (m V p-p) 25 20 15 10 5 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 Iout（Ａ） Vin：5.6V Vin：9.6V Vin：14V Fig.7-3-9. Ripple Voltage v.s. Output Current Note: 1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 2009.8.20 MPDRX303S,304S Application 12 7. 3. 4 Vout=1.5V (MPDRX304S) （Ta=25 oC, Cin= GRM32ER71C226KE15L×2, Cout=GRM32EB30J107ME16L×2, RVAR=4737Ω） Efficiency Load Reguration 90 1.530 87 E fficien cy（ ％ ） 1.545 V o u t（ V ） 1.515 1.500 1.485 84 81 78 1.470 1.455 75 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 Iout（Ａ） Vin：5.6V Vin：9.6V Iout（Ａ） Vin：14V Fig.7-3-10. Output Voltage v.s. Output Current Vin：5.6V Vin：9.6V Vin：14V Fig.7-3-11. Efficiency v.s. Output Current Ripple noise voltage R ipple nois e v olta g e (m V p-p) 25 20 15 10 5 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 Iout（Ａ） Vin：5.6V Vin：9.6V Vin：14V Fig.7-3-12. Ripple Voltage v.s. Output Current Note: 1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 2009.8.20 MPDRX303S,304S Application 13 7. 3. 5 Vout=1.2V (MPDRX304S) （Ta=25 oC, Cin= GRM32ER71C226KE15L×2, Cout=GRM32EB30J107ME16L×2, RVAR=16453Ω） Efficiency Load Reguration 90 1.224 87 E fficien cy（ ％ ） 1.236 V o u t（ V ） 1.212 1.200 1.188 84 81 1.176 78 1.164 75 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 Iout（Ａ） Vin：5.6V Vin：9.6V Iout（Ａ） Vin：14V Fig.7-3-13. Output Voltage v.s. Output Current Vin：5.6V Vin：9.6V Vin：14V Fig.7-3-14. Efficiency v.s. Output Current Ripple noise voltage R ipple nois e v olta g e (m V p-p) 25 20 15 10 5 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 Iout（Ａ） Vin：5.6V Vin：9.6V Vin：14V Fig.7-3-15. Ripple Voltage v.s. Output Current Note: 1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 2009.8.20 MPDRX303S,304S Application 14 7. 3. 6 Vout=0.8V (MPDRX304S) （Ta=25 oC, Cin= GRM32ER71C226KE15L×2, Cout=GRM32EB30J107ME16L×2, RVAR=3394900Ω） Load Reguration Efficiency 90 0.816 87 E fficien cy（ ％ ） 0.824 V o u t（ V ） 0.808 0.800 0.792 84 81 0.784 78 0.776 75 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 Iout（Ａ） Vin：5.6V Vin：9.6V Iout（Ａ） Vin：14V Fig.7-3-16. Output Voltage v.s. Output Current Vin：5.6V Vin：9.6V Vin：14V Fig.7-3-17. Efficiency v.s. Output Current Ripple noise voltage R ipple nois e v olta g e (m V p-p) 25 20 15 10 5 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 Iout（Ａ） Vin：5.6V Vin：9.6V Vin：14V Fig.7-3-18. Ripple Voltage v.s. Output Current Note: 1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 2009.8.20 MPDRX303S,304S Application 15 8. Mounting Condition 8. 1 PCB Land Pattern Recommendation 1pin 13.3 7.0 4.2 1.8 1.0 1.97 2.54 1.5 8. 2 Recommended Soldering Conditions Reflow Soldering This product is RoHS compliant. The following profile is recommended for the reflow of this product using Pb-free solder paste (Sn-Ag-Cu). Method : Full convection reflow soldering Reflow Soldering Profile JEDEC IPC/JEDEC J-STD-020D Table 5-2 Classification Reflow Profile Pb-Free Assembly Large Body Profile details Soldering temperature Soldering time Heating time Preheating time Programming rate Descending rate Total soldering time Times : : : : : : : : 245ºC+0/-5ºC 30 seconds, 240 to 245ºC 60 to 150 seconds, over217ºC 60 to 120 seconds,150 to 200ºC 3ºC/ sec. Max., 217 to 245ºC 6ºC/ sec. Max. 8 minutes Max., 25 to 245ºC 1 time 245oC Parts surface temperature [ºC] 217 oC 200 oC 60∼150 (seconds) 150oC 60∼120 (seconds) Times ※Do not vibrate for the products on reflow. Please need to take care temperature control because mounted parts may come off if the product are left under the high temperature. Do not reflow DC-DC converter as follows, because DC-DC converter may fall down from a substrate during reflowing. Substrate Note: DC-DC Converter 1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 2009.8.20 MPDRX303S,304S Application 16 9. Notice Input / Output capacitor ① Both input-side and output side, please make the wiring loop between plus and minus as small as possible. The influence of a leakage inductance can be reduced. ② Please make the power line pattern as wide and short as possible. This product should not be operated in parallel or in series. Please do not use a connector or a socket to connect this product to your product. The electric characteristics may be deteriorated by the influence of contact resistance. Be sure to provide an appropriate fail-safe function on your product to prevent secondary damage that may be caused due to abnormal functional or failure of this product. Inrush current protection is not a feature of this product. Please connect the input terminals with the correct polarity. If an error in polarity connection is made this product may be damaged. If this product is damaged internally, an elevated input current may flow, and so this product may exhibit an abnormal temperature rise, or your product may be damaged. Please add a diode and fuse per the following diagram to protect them. fuse + + + diode IN - OUT Load - ※Please select diode and fuse after confirming the operation of your product. Note １. Please contact our main sales office or nearby sales office before using our products for the applications listed below which require especially high reliability for the prevention of defects which might directly cause damage to the third party’s life, body or property or this products for any other applications that described in the above. ! ①Aircraft equipment ②Aerospace equipment ③Undersea equipment ④Power plant control equipment ⑤Medical equipment ⑥Transportation equipment (vehicles, trains, ships, etc.) ⑦Traffic signal equipment ⑧Disaster prevention /crime prevention equipment ⑨Data-processing equipment ⑩Application of similar complexity and/or reliability requirements to the applications listed in the above. ２. This catalog is indicated in August 2009. About the written contents, since changing without a preliminary announcement for improvement and supply are sometimes stopped, please confirm in case of ordering. If written contents are unknown, please ask to our main sales office or nearby sales office. ３. Types and specification in this catalog are referenced for your information only. Please confirm detailed specifications by approving our individual drawing and specification sheet. Note: 1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’ s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 2009.8.20