500mA LDO with soft-start Monolithic IC MM3478 Series

Transcription

1 5mA LDO with soft-start Monolithic IC MM3478 Series 5mA LDO with soft-start MM3478 Series Outline This IC is a 5mA LDO with soft-start. The soft-start can reduce a rush current by the Cs capacitor on start-up. Package is SOT89-5A which can be the high radiation of heat on small space. Features 1. Maximum input voltage 6V 2. Output current 5mA 3. No load input current 5µA typ. 4. Input current (OFF) 1µA max. 5. Output voltage range 1.2~5.V 6. Output voltage accuracy ±1% or ±15mV 7. Dropout voltage.35v max. (IO=5mA, VO=3V) 8. Line regulation ±.2%/V max. 9. Load regulation 8mV max.(io=1~5ma) 1. Ripple rejection 7dB typ. (f=1khz) 11. Thermal shutdown Built-in 12. Output Capacitor 1µF Package SOT89-5A Applications 1. TV 2. BD recorder/player 3. Printer 4. Game

2 5mA LDO with soft-start MM3478 Series Model Name M M a b c d e A a Function Type CE=H-Active, with Discharge Function b Voltage Output RANK 12 The combination of each regulator output voltage is specified by design serial numbers. It is assigned in order from 12. Output voltage can be set in the 5 range. ~ c Package d Packing Specifications P SOT89-5A R R HOUSING (SOT89-5A_Standard) L L HOUSING e E EMBOSS TAPE

3 5mA LDO with soft-start MM3478 Series Block Diagram VDD VOUT CE Bias CS Vref GND Thermal Shutdown Current Limit Pin Assignment CE 2 GND 3 CS 4 VDD 5 VOUT SOT89-5A (TOP VIEW) Pin Description Pin No. Pin name Functions ON/OFF-Control pin 1 CE CE L H OUTPUT OFF ON Note : Must be connect capacitor to Soft-Start pin. Refer to 9 and 19 for details. Connect CE pin with VDD pin, when it is not used. 2 GND GND pin 3 CS Soft-Start pin 4 VDD Voltage-Supply pin 5 VOUT Output pin

4 5mA LDO with soft-start MM3478 Series Absolute Maximum Ratings (Except where noted otherwise Ta=25 C) Item Symbol Ratings Units Storage Temperature Tstg 55~+15 C Junction Temperature TjMAX 15 C Supply Voltage VDD.3~+6.5 V CE input Voltage VCE.3~+6.5 V Output Voltage VOUT.3~VDD+.3 V Cs Voltage VCS.3~VDD+.3 V Output Current IOMAX 6 ma Power Dissipation (Note1) Pd 178 mw Note1 : JEDEC51-7 standard 114.3mm 76.2mm t=1.6mm Recommended Operating Conditions (Except where noted otherwise Ta=25 C) Item Symbol Ratings Units Operating Ambient Temperature Topr -4~+85 C Operating Voltage Vop 1.6~6. V Output Current IOUT ~5 ma

5 5mA LDO with soft-start MM3478 Series Electrical Characteristics 1 (Except where noted otherwise VDD=VOUT(TYP.)+1V, VCE=VDD, Ta=25 C) Item Symbol Measurement conditions Min. Typ. Max. Units Input Current (OFF) IDDOFF VCE=V.1 1. µa No-Load Input Current IDD IOUT=mA 5 8 µa Output Voltage VOUT IOUT=1mA, 1.5 VOUT IOUT=1mA, VOUT 1.5V V VOUT(typ.)+.5V VDD 6.V Line Regulation VLINE IOUT=1mA, 2.V 2.5V VDD 6.V VOUT.5.2 %/V IOUT=1mA, VOUT 2.V Load Regulation VLOAD 1mA IOUT 5mA 4 8 mv Dropout Voltage Vio Please refer to another page V Ripple Rejection RR f=1khz, Vripple=.5V, IOUT=1mA 1.5 VOUT f=1khz, Vripple=.5V, IOUT=1mA VDD=2.5V, VOUT 1.5V 7 db VOUT Temperature Coefficient (Note2) VOUT / T IOUT=1mA, -4 Top +85 C 1 ppm/ C Output Current IOUT 5 ma Output Short-Circuit Current (Note2) Ishort VOUT=V 3 ma Thermal ShutDown Detect Temperature (Note2) Thermal ShutDown Release Temperature (Note2) TSD 15 C TSR 125 C Output Rise Time (Note2) tr CS=.1µF 1.5 ms CE High Threshold Voltage VCEH V CE Low Threshold Voltage VCEL.3 V CE Pin Current ICE VCE=2.V.3 µa Output NMOS ON Resistance (Note2) RDON VCE=V, VDD=4V 3 Note2 : The parameter is guaranteed by design.

6 5mA LDO with soft-start MM3478 Series Electrical Characteristics 2 (Except where noted otherwise VDD=VOUT(TYP.)+1V, VCE=VDD, Ta=25 C) Model No. MM3478A12 Item Output Voltage Dropout Voltage VOUT (V) Vio (V) Measurement Conditions Min. Typ. Max. Measurement Conditions Min. Typ. Max MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A31 IOUT=1mA MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A IOUT=2mA, VOUT 2.V (Note3) IOUT=2mA, 2.V VOUT, VDD=VOUT (TYP.) -.2V Note3 : Dropout voltage maximum value in the input and it is confirmed that there is no output abnormal voltage impression the 2mA in the model less than VOUT< 2.V.

7 5mA LDO with soft-start MM3478 Series Model No. MM3478A12 Item Output Voltage Dropout Voltage VOUT (V) Vio (V) Measurement Conditions Min. Typ. Max. Measurement Conditions Min. Typ. Max MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A31 IOUT=1mA MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A MM3478A IOUT=5mA, VOUT 2.V (Note4) IOUT=5mA, 2.V VOUT, VDD=VOUT (TYP.) -.2V Note4 : Dropout voltage maximum value in the input and it is confirmed that there is no output abnormal voltage impression the 5mA in the model less than VOUT< 2.V.

8 5mA LDO with soft-start MM3478 Series Measuring Circuit A 1µF 1µF VDD VOUT A V A CE GND CS.1µF Application Circuit 1µF 1µF VDD VOUT CE GND CS.1µF Temperature Characteristics : B (Reference example of external parts) Output capacitor Ceramic capacitor 1.µF Input capacitor Ceramic capacitor 1.µF Softstart Capacitor Ceramic capacitor.1µf In the event a problem which may affect industrial property or any other rights of us or a third party is encountered during the use of information described in these circuit, we shall not be liable for any such problem, nor grant a license therefore.

9 5mA LDO with soft-start MM3478 Series Note 1. There is a possibility with deterioration and destruction of IC when using it exceeding the absolute maximum rating. The absolute maximum rating, Never exceed it. The functional operation is not assured. 2. There is a possibility that it becomes impossible to maintain this performance and reliability IC original when using it exceeding recommended operation voltage. Please use it in recommended operation voltage. 3. Due to restrictions on the package power dissipation, the output current value may not be satisfied. Attention should be paid to the power dissipation of the package when the output current is large or the voltage between Input and Output is high. 4. The output capacitor is required between output and GND to prevent oscillation. 5. The ESR of capacitor must be defined in ESR stability area. It is possible to use a ceramic capacitor without ESR resistance for output. The ceramic capacitor must be used more than 1.µF and B temperature characteristics. 6. The wire of VDD and GND is required to print full ground plane for noise and stability. 7. The input capacitor must be connected a distance of less than 1cm from input pin. 8. In case the output voltage is above the input voltage, the overcurrent flow by internal parasitic diode from output to input.in such application, the external bypass diode must be connected between output and input pin. Schottky barrier diode VDD VOUT CE GND CS 9. Please connect the soft-start capacitor(cs) more than.1µf with the terminal Cs. 1. The output capacitor and the softstart capacitor must be connected it within the limits a rush current peak level 5mA showed in the typical performance characteristics. 11. When rush current exceeds current limit characteristics, it is restricted with the current limit set up with the chip, an output rise time is uncontrollable by soft-start capacitor. 12. When use connecting VDD and CE, in the case of starting VDD in input rise time longer then the set-up soft-start time, an output rise time is decide by a VDD input rise time. 13. Please do not give the voltage to the terminal Cs. 14. When the voltage of the terminal Cs is higher than the voltage of VDD, it becomes test mode In that case, there is a possibility that the output voltage becomes unstable. 15. It is able to an unstable operation when you use the capacitor with intense capacitance change The capacitor has the dependency at the power-supply voltage and the temperature. The capacity value changes by the environment used. Please evaluate IC in the set. 16. The overcurrent protection circuit of the vertical type is built into this IC. 17. There is a possibility that IC generates heat when the output terminal is short-circuited. However, the thermal shutdown circuit operates, and it will do operation that protects IC. The thermal shutdown circuit is designed only to shut the IC off to prevent thermal runaway. Do not continue to use the IC in an environment where the operation of this circuit is assumed. The characteristic changes depending on the substrate condition. Please evaluate IC in the set. 18. It returns automatically in temperature returned after it shuts down by self-generation of heat. After it returns, it shuts down again by self-generation of heat. It is necessary to change the environment used (IC consumption, temperature) if it operates in upper cycle.

10 5mA LDO with soft-start MM3478 Series 19. When VDD rise time is longer than Vout rise time, Vout rise time is decided by VDD rise time. At this time, Vout is may rose more than typical voltage. Please set to soft-start capacitor for the VDD rise time in the slash area shown in Fig. 1. Fig. 1 is common for all the voltage ranks, because soft start time is decided by soft start capacitor and reference voltage. Please choose to a capacitor in consideration of the dispersion. Refer to Fig. 2 for a measurement circuit. Condition : VDD=Vout (typ.) +1V, CE=VDD, Ta=-4 C~+85 C VDD 1 9% Vout VDD rise time [ms] Setting area 1% t * VDD rise time (t) of VDD is judgedin time (1%-9%) until VDD reaches Vout setting voltage Soft-start capacitor [uf] Fig, 1 Soft-start capacitor vs VDD rise time 1µF 1µF VDD VOUT CE GND CS.1µF ~3.3µF Fig, 2 Test Circuit

11 5mA LDO with soft-start MM3478 Series About Power Dissipation The Power dissipation change if board to mount IC change because radiative heat fi x at board.it is reference data below, Evaluate IC in the set. 1. PC Board of glass epoxy Board size 114.3mm 76.2mm t=1.6mm Copper foil area 8% Power dissipation 1mW Ta=25 C 2. JEDEC51-7 standard Board size 114.3mm 76.2mm t=1.6mm Copper foil area 8% Power dissipation 178mW Ta=25 C (It is reference value measured by JEDEC51-7 standard.) 2 18 Power Dissipation(mW) JEDEC51-7 standard (4 layer) 1. PC Board of glass epoxy (2 layer) Ambient Temperature( C) It is recommended to layout the VIA for heat radiation in the GND pattern of reverse (of IC) when there is the GND pattern in the inner layer (in using multiplayer substrate). By increasing these copper foil pattern area of PCB, Power dissipation improves.

12 5mA LDO with soft-start MM3478 Series Characteristics (VOUT=1.2V) (Except where noted otherwise VDD=VOUT(TYP.)+1V, VCE=VDD, Ta=25 C) Input Voltage - Output Voltage Input Voltage - Input Current Output Voltage Vout (V) RL= RL=2.4 RL= Input Current IDD (µa) RL= Input Voltage VDD (V) Input Voltage VDD (V) Load Regulation Line Regulation Load Regulation VLOAD (mv) Line Regulation VLINE (mv) RL= Output Current Iout (ma) Input Voltage VDD (V) Ripple Rejection Ripple Rejection RR (db) RL=12 RL= RL=1.2k Frequency f (khz)

13 5mA LDO with soft-start MM3478 Series Output Current - Output Voltage ESR stable area Output Voltage Vout (V) Output Current Iout (A) ESR ( ) Stable area Output Current Iout (ma) Output Voltage Temperature Coefficient Output Voltage Vout (V) RL= Temperature Ta (ºC) Load Transient response (Cin=Co=1µF) IO=5mA 25mA 1µs/div IO=5mA 1µs/div 5mA IO:1mA/div IO:2mA/div VO:1mV/div VO:2mV/div

14 5mA LDO with soft-start MM3478 Series Input rise characteristics (VDD=V 2.2V, VCE=VDD) CE rise characteristics (VDD=2.2V, CE=V VDD) 5µs/div VDD:2.V/div 5µs/div CE:2.V/div Vo:.5V/div Vo:.5V/div Iin:2mA/div Iin:2mA/div Vout discharge characteristics (VDD=2.2V, CE=VDD V) Cs discharge characteristics (VDD=2.2V, CE=VDD V) 5µs/div CE:2V/div 5µs/div CE:2V/div Vo:.5V/div CS:.5V/div Rush Current Peak Level Co: Aluminum electrolytic capacitor Rush Current Peak Level (ma) CO=1uF CO=47uF CO=1uF CO=1uF Cs (uf) CO=22uF Output rise time Output Rise Time (ms) Cs (uf)

15 5mA LDO with soft-start MM3478 Series Characteristics (VOUT=3.V) (Except where noted otherwise VDD=VOUT(TYP.)+1V, VCE=VDD, Ta=25 C) Input Voltage - Output Voltage Input Voltage - Input Current Output Voltage Vout (V) RL= RL= RL= Input Voltage VDD (V) Input Current IDD (µa) RL= Input Voltage VDD (V) Load Regulation Line Regulation Load Regulation VLOAD (mv) Output Current Iout (ma) Line Regulation VLINE (mv) RL= Input Voltage VDD (V) Dropout Voltage Ripple Rejection Dropout Voltage Vio (V) Output Current Iout (ma) Ripple Rejection RR (db) RL= RL=3 RL=3k Frequency f (khz)

16 5mA LDO with soft-start MM3478 Series Output Current - Output Voltage ESR stable area 4. 1 Output Voltage Vout (V) Output Current Iout (A) ESR ( ) Stable area Output Current Iout (ma) Output Voltage Temperature Coefficient Output Voltage Vout (V) RL= Temperature Ta (ºC) Load Transient response (Cin=Co=1µF) IO=5mA 25mA 1µs/div IO=5mA 1µs/div 5mA IO:1mA/div IO:2mA/div VO:1mV/div VO:2mV/div

17 5mA LDO with soft-start MM3478 Series Input rise characteristics (VDD=V 4.V, VCE=VDD) CE rise characteristics (VDD=4.V, CE=V VDD) 5µs/div VDD:2.V/div 5µs/div CE:2.V/div Vo:2.V/div Vo:2.V/div Iin:2mA/div Iin:2mA/div Vout discharge characteristics (VDD=4.V, CE=VDD V) Cs discharge characteristics (VDD=4.V, CE=VDD V) 5µs/div CE:2V/div 5µs/div CE:2V/div Vo:1V/div CS:1V/div Rush Current Peak Level Co: Aluminum electrolytic capacitor Rush Current Peak Level (ma) CO=1uF CO=47uF CO=1uF Cs (uf) CO=22uF CO=1uF Output rise time Output Rise Time (ms) Cs (uf)

18 5mA LDO with soft-start MM3478 Series Characteristics (VOUT=5.V) (Except where noted otherwise VDD=VOUT(TYP.)+1V, VCE=VDD, Ta=25 C) Input Voltage - Output Voltage Input Voltage - Input Current Output Voltage Vout (V) 6 RL= RL= RL= Input Voltage VDD (V) Input Current IDD (µa) RL= Input Voltage VDD (V) Load Regulation Line Regulation Load Regulation VLOAD (mv) Output Current Iout (ma) Line Regulation VLINE (mv) RL= Input Voltage VDD (V) Dropout Voltage Ripple Rejection Dropout Voltage Vio (V) Output Current Iout (ma) Ripple Rejection RR (db) RL=5k RL=5 RL= Frequency f (khz)

19 5mA LDO with soft-start MM3478 Series Output Current - Output Voltage 6 ESR stable area 1 Output Voltage Vout (V) ESR ( ) 1.1 Stable area Output Current Iout (A) Output Current Iout (ma) Output Voltage Temperature Coefficient 6 RL=5 Output Voltage Vout (V) Temperature Ta (ºC) Load Transient response (Cin=Co=1µF) IO=5mA 25mA 1µs/div IO=5mA 1µs/div 5mA IO:1mA/div IO:2mA/div VO:1mV/div VO:2mV/div

20 5mA LDO with soft-start MM3478 Series Input rise characteristics (VDD=V 6.V, VCE=VDD) CE rise characteristics (VDD=6.V, CE=V VDD) 5µs/div VDD:5.V/div 5µs/div CE:5.V/div Vo:2.V/div Vo:2.V/div Iin:2mA/div Iin:2mA/div Vout discharge characteristics (VDD=6.V, CE=VDD V) Cs discharge characteristics (VDD=6.V, CE=VDD V) 5µs/div 5µs/div CE:5V/div CE:5V/div Vo:2V/div CS:1V/div Rush Current Peak Level Co: Aluminum electrolytic capacitor Rush Current Peak Level (ma) CO=1uF CO=47uF CO=1uF Cs (uf) CO=22uF CO=1uF Output rise time Output Rise Time (ms) Cs (uf)