MPDRX307S,308S Application 1 DC-DC Converter Application Manual MPDRX307S,MPDRX308S 1. Features ･Ultra high-speed response is realized by using original ripple detecting control. ･Up to 6.5A output current, non-isolated POL. ･Wide adjustable output voltage range by connecting external resistance (0.8V to 1.65V / 1.6 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 20.2±0.2 6 P Ｙ□ P M 12 1 ( )…reference value P=2.54 ±0.2mm P P P 17.6±0.2 □ □ P P P ① ②③ P P 7 Tolerance is not accumulated. 4.2max. Marking (1) Pin No.1 Marking (2) Parts No. / MFG ID Y□ ① ① (3) Lot No D：MPDRX307S E：MPDRX308S □□ ②③ ②Production Year ③Production 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 MPDRX307S,308S Application 2 Pin Number and Function Pin No. 1 2 3,4 5 6 7 8 9 10 11 12 Symbol VAR FT GND Vout SENSE Vin GND ON/OFF SS POWGOOD1 POWGOOD2 Function Vout Adjustment Output Trim GND Output Voltage Output Voltage Sense Input Voltage GND Remote ON/OFF Soft Start Power Good Power Good 3. Block Diagram 7 Vout Vin 5 SENSE 6 8 9 GND GND ON/OFF 3,4 VAR 1 FT Control Circuit 2 11 POW-GOOD1 12 POW-GOOD2 SS 10 4. Test Circuit 6 SENSE 7 9 Vout Vin ON/OFF MPDRX307S/308S 10 SS 11 PG1 C1、C2 12 PG2 Open = ON Short = OFF Note: 5 GND VAR 1 FT 2 RVAR C3 RL 3,4,8 Open:Vo < 0.95V Short:Vo≧0.95V C1,C2：10µF／25V Ceramic Capacitor C3, ：100µF／6.3V Ceramic Capacitor Please make sure to place C1 ,C2 and C3 nearby input and output terminal of 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 MPDRX307S,308S Application 3 5. Characteristics 5. 1 Electrical Characteristics (Ta=25 oC) (1) MPDRX307S 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 - 6.5 A Ripple Voltage Vrpl - 10 50 mV(pp) Vout=3.3V - 92 - Vout=2.5V - 90 - Vout=1.8V - 88 - Vin =9.6V, Vout=3.3V - 850 - Vin =9.6V, Vout=1.8V - 600 - 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∼6.5A BW=20MHz, Cout=100µF Vin =9.6V, Iout=10A 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 10.5 A abnormal mode , DC-DC converter will restart by re-inputting Vin or toggling ON/OFFpin. When input voltage is ideal voltage 20 5000 µF source When input voltage is ideal voltage 100 1000 µF 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% 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 MPDRX307S,308S Application 4 (2) MPDRX308S 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 -2.5 - +2.5 -2.0 - +2.0 0 - 6.5 A - 10 50 mV(pp) Vout=1.5V - 85 - Vout=1.2V - 83 - Vout=0.8V - 79 - Vin =9.6V, Vout=1.5V - 750 - Vin =9.6V, Vout=0.8V - 450 - PWGL Power Good low threshold - 0.87Vo - PWGH Power Good high threshold - 1.13Vo - Output Voltage Tolerance Vo tol Output Current Iout Ripple Voltage Vrpl Efficiency Operating Frequency Power Good EFF V Vout=0.8∼0.95V Over Vin, Io, FT=Open Temperature Range Vin=6.2∼13.2V Vout=0.95∼1.65V Rset=1% FT=Short tolerance See the thermal derating curve in section 5.2. Vout =1.65V, Iout=0∼13A BW=20MHz, Cout=100µF Vin =9.6V, Iout=5A %Vo 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 10.5 A restart by re-inputting Vin or toggling ON/OFF pin. When input voltage is ideal voltage 20 5000 µF source When input voltage is ideal voltage 100 1000 µF 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% 1 2 5 msec - 0 +10 % 0.1 0.5 2 msec 0.1 0.4 2 msec ※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 MPDRX307S,308S Application 5 5. 2 Thermal Derating MP D R X307S（-Y) (V in=6.2∼ 12V 、V out=1.6∼ 3.63V ) MP D R X3 0 8 S（ - Y) (V in = 6 . 2 ∼ 1 2 V 、V ou t= 0 . 8 ∼ 1 .6 5 V ) 8 8 7 7 I o u t［ A ］ 5 4 0 .0 ｍ / ｓ 3 5 3 .0 m / s 2 .0 m / s 1 .5 ｍ / ｓ 1 .0 m / s 4 0 .0 ｍ / ｓ 6 I o u t［ A ］ 3 .0 m/ s 2 .0 m/ s 1 .5 ｍ / ｓ 1 .0 m/ s 6 3 2 2 1 1 0 0 20 30 40 50 60 T a[℃ ] 70 8 0 85 20 30 40 50 60 T a[℃ ] 8 0 85 70 The above derating limits apply to this product soldered directly to 101.6*180mm*1.6mm PCB (Double-side with 70um copper). 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(1Pin) 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(2pin) to GND. Internal Circuit MPDRX307S ①MPDRX307S Vout MPDRX308S VAR pin 307S：1.8 kΩ 308S：5.1kΩ (FT-pin： SHORT to GND) 5440 RVAR＝ ②MPDRX308S (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 MPDRX307S,308S Application 6 <RVAR calculation example> MPDRX307S Voadj [V] Calculated RVAR[Ω] 3.63 3.3 2.5 1.8 1.6 745 1211 3613 16118 50913 FT pin (8pin) Short to GND Short to GND Short to GND Short to GND Short to GND MPDRX308S Voadj [V] Calculated RVAR[Ω] 1.65 1.5 1.2 1.0 0.95 0.9 0.8 2635 4737 16453 99515 2858058 48338 3394900 FT pin (8pin) 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(13pin) is left open When ON/OFF-pin(13pin) is connected to GND …… …… Output Voltage =ON Output Voltage=OFF MPDRX30*S example GND ON/OFF or 6.3. Power Good Powergood signal is appeared within the value of clause 5.1. (Open-drain output) Output voltage is within voltage detection threshold: POW-GOOD is open. Output Voltage is out of voltage detection threshold : POW-GOOD is connected to GND. PG2 MPDRX30*S PG1 Internal circuit 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 MPDRX307S,308S Application 7 6. 4. 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 6.5. Input External capacitor It is recommended to connect a low-impedance electrolytic capacitor of 20µF 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 6.6. 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 100µF to 1000µF. Output capacitor shall be placed near the output terminal. When using plural capacitors, please make sure to place a capacitor of at least 100µF 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 100µF 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 MPDRX307S,308S Application 8 6.7. Reset Condition In order to reset all function, the input Voltage is set under 0.5V for Min.100 m second or ON/OFF pin voltage is set under 1.0V for Min 10m second. Input Voltage 6.2∼ 13.2V Reset Condition Max. 0.5V Min. 100 ms ON/OFF Pin Voltage Max. 1.0V Min. 10 ms 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 MPDRX307S,308S Application 9 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(MPDRX307S,Fig.7-1a) , 1.2V(MPDRX308S,Fig.7-1b) Io=5A ->0A, di/dt=5A/us, Cout=100uF(Ceramic), Ta=25 oC Vout Vout 100mV/div 100mV/div 10us/div 10us/div Iout Iout Fig.7-1a. Load Transient Response (MPDRX307S) Fig.7-1b.Load Transient Response (MPDRX308S) 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 RX301S/302S Output Impedance MPDRX307S/308S 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 MPDRX307S/308S 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 MPDRX307S,308S Application 10 7. 3 Other electrical characteristics 7.3.1. Vout=3.3V (MPDRX307S) （Ta=25 oC, Cin= GRM32DR71E106KA12L×2, Cout= GRM32EB30J107ME16, RVAR=1211Ω） Efficiency Load Regulation 100 3.366 95 3.333 90 E ff [% ] V o u t [V ] 3.399 3.300 85 3.267 80 3.234 75 3.201 70 0 1 2 Vin=5.6V 3 4 Iout[A] 5 Vin=9V 6 0 Vin=14V Fig.7-3-1. Output Voltage v.s. Output Current 1 2 Vin=5.6V 3 4 Iout[A] Vin=9V 5 6 Vin=14V Fig.7-3-2. Efficiency v.s. Output Current Ripple noise voltage Ripple noise voltage [m Vp-p] 25 20 15 10 5 0 0 1 2 Vin=5.6V 3 4 Iout[A] Vin=9V 5 6 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 MPDRX307S,308S Application 11 7.3.2. Vout=2.5V (MPDRX307S) （Ta=25 oC, Cin= GRM32DR71E106KA12L×2, Cout= GRM32EB30J107ME16, RVAR=3613Ω） Efficiency 2.575 100 2.550 95 2.525 90 Eff [%] Vout [V] Load Regulation 2.500 85 2.475 80 2.450 75 2.425 70 0 1 2 Vin=5.6V 3 4 Iout[A] 5 Vin=9V 6 Vin=14V Fig.7-3-4. Output Voltage v.s. Output Current 0 1 2 Vin=5.6V 3 4 Iout[A] Vin=9V 5 6 Vin=14V Fig.7-3-5. Efficiency v.s. Output Current Ripple noise voltage Ripple noise voltage [m Vp-p] 25 20 15 10 5 0 0 1 2 3 4 Iout[A] Vin=5.6V Vin=9V 5 6 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 MPDRX307S,308S Application 12 7.3.3. Vout=1.8V (MPDRX307S) （Ta=25 oC, Cin= GRM32DR71E106KA12L×2, Cout= GRM32EB30J107ME16, RVAR=16118Ω） Efficiency Load regulation 1.854 1.818 Eff [% ] V o u t [V ] 1.836 1.800 1.782 1.764 1.746 0 1 2 Vin=5.6V 3 4 Iout[A] 5 Vin=9V 6 Vin=14V Fig.7-3-7. Output Voltage v.s. Output Current 100 95 90 85 80 75 70 65 60 0 1 2 Vin=5.6V 3 4 Iout[A] Vin=9V 5 6 Vin=14V Fig.7-3-8. Efficiency v.s. Output Current Ripple noise voltage Ripple noise voltage [m Vp-p] 25 20 15 10 5 0 0 1 2 Vin=5.6V 3 4 Iout[A] Vin=9V 5 6 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 MPDRX307S,308S Application 13 7.3.4. Vout=1.5V (MPDRX308S) （Ta=25 oC, Cin= GRM32DR71E106KA12L×2, Cout= GRM32EB30J107ME16, RVAR=4737Ω） Efficiency 1.545 95 1.530 90 1.515 85 E ff [% ] Vout [V] Road regulation 1.500 80 1.485 75 1.470 70 1.455 65 0 1 2 Vin=5.6V 3 4 Iout[A] Vin=9V 5 6 Vin=14V Fig.7-3-10. Output Voltage v.s. Output Current 0 1 2 Vin=5.6V 3 4 Iout[A] Vin=9V 5 6 Vin=14V Fig.7-3-11. Efficiency v.s. Output Current Ripple noise voltage ripple noise voltage [mVp-p] 25 20 15 10 5 0 0 1 2 Vin=5.6V 3 4 Iout[A] Vin=9V 5 6 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 MPDRX307S,308S Application 14 7.3.5. Vout=1.2V (MPDRX308S) （Ta=25 oC, Cin= GRM32DR71E106KA12L×2, Cout= GRM32EB30J107ME16, RVAR=16453Ω） Efficiency 1.236 90 1.224 85 1.212 80 Eff [%] V o u t [V ] Load regulation 1.200 75 1.188 70 1.176 65 1.164 60 0 1 2 Vin=5.6V 3 4 Iout[A] Vin=9V 5 6 Vin=14V Fig.7-3-13. Output Voltage v.s. Output Current 0 1 2 Vin=5.6V 3 4 Iout[A] Vin=9V 5 6 Vin=14V Fig.7-3-14. Efficiency v.s. Output Current Ripple noise voltage ripple noise voltage [m Vp-p] 25 20 15 10 5 0 0 1 2 Vin=5.6V 3 4 Iout[A] Vin=9V 5 6 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 MPDRX307S,308S Application 15 7.3.6. Vout=0.8V (MPDRX308S) （Ta=25 oC, Cin= GRM32DR71E106KA12L×2, Cout= GRM32EB30J107ME16, RVAR=3394900Ω） Efficiency 0.824 90 0.816 85 0.808 80 Eff [%] Vout [V] Load regulation 0.800 75 0.792 70 0.784 65 60 0.776 0 1 2 Vin=5.6V 3 4 Iout[A] 5 6 Vin=9V Vin=14V Fig.7-3-16. Output Voltage v.s. Output Current 0 1 2 Vin=5.6V 3 4 Iout[A] Vin=9V 5 6 Vin=14V Fig.7-3-17. Efficiency v.s. Output Current Ripple noise voltage ripple noise voltage [m Vp-p] 25 20 15 10 5 0 0 1 2 Vin=5.6V 3 4 Iout[A] Vin=9V 5 6 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 MPDRX307S,308S Application 16 8. Mounting Condition 8. 1 PCB Land Pattern Recommendation 2.5 1.5 1pin 12.7 2.54 19.7 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 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 MPDRX307S,308S Application 17 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 March 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