High-Precision Three-Pin Regulator MM1257 MITSUMI High-Precision Three-Pin Regulator Monolithic IC MM1257 Outline This IC is a high-precision high-voltage stabilized power supply device which stands out from ordinary lowsaturation three-pin regulators. It can be used at a wide range of output voltages, from 3V to 12V, delivering output currents up to 100mA. It is one of a series of devices available at lower prices than previous regulators. Features 1. 2. 3. 4. 5. 6. Input current Output noise voltage Maximum output current No-load input current Thermal shutdown circuit provided Output voltage ranks 27V max. 200µVRMS typ. 100mA max. 500µA typ. A : 12V±2% E : 6V±2% B : 10V±2% F : 5V±2% C : 9V±2% G : 3V±2% D : 8V±2% Package TO-92A (MM1257 T) MMP-4A (MM1257 M) The output voltage rank appears in the boxes. * Applications 1. Handheld computers 2. Portable transceivers 3. Cordless phones Pin Assignment 4 3 1 2 MMP-4A 1 NC 2 VIN 3 VOUT 4 GND 1 2 3 TO-92A 1 VOUT 2 GND 3 VIN High-Precision Three-Pin Regulator MM1257 MITSUMI Equivalent Circuit Diagram Absolute Maximum Ratings (Ta=25°C) Item Symbol Ratings Units Storage temperature TSTG -40~+125 °C Operating temperature TOPR -20~+75 °C Power supply current VCC max. 27 V Output current IOUT 100 mA Maximum Ratings Pd 200 (MMP-4A), 300 (TO-92A) mW Recommended Operating Conditions Item Symbol Ratings Units Input voltage VIN 7~27 V Output current IO 1~100 mA Pin Description Pin no. Pin name Function 1 N.C N.C 2 VIN Power supply input pin 3 VOUT Regulator output pin 4 GND GND High-Precision Three-Pin Regulator MM1257 MITSUMI Electrical Characteristics Item Output voltage No-load input current (VO=5V) Symbol VO ICCq Measurement circuit 1 1 Input fluctuation rate V1 1 Load fluctuation rate V2 1 Measuring Circuit Application Circuits Measurement conditions VIN=Vo+3V, Io=40mA VIN=7V, Io=40mA VIN=Vo+4V, Io=40mA VIN=14.5V~25V, Io=40mA VIN=12.5V~24V, Io=40mA VIN=11.5V~22V, Io=40mA VIN=10.5V~22V, Io=40mA VIN=8.5V~20V, Io=40mA VIN=7V~20V, Io=40mA VIN=7V~18V, Io=40mA VIN=15V, Io=1~100mA VIN=13V, Io=1~100mA VIN=12V, Io=1~100mA VIN=11V, Io=1~100mA VIN=9V, Io=1~100mA VIN=8V, Io=1~100mA VIN=8V, Io=1~100mA Min. Typ. Max. Units A B C D E F G A B C D E F G A B C D E F G 11.76 12.0 12.24 9.80 10.0 10.20 8.82 9.0 9.18 7.84 8.0 8.16 V 5.88 6.0 6.12 4.90 5.0 5.10 2.94 3.0 3.06 0.50 1.50 mA 120 250 110 250 100 250 90 250 mV 60 200 50 150 25 150 80 160 70 140 65 130 60 120 mV 40 80 20 60 20 60