MM1257

MITSUMI High-Precision Three-Pin Regulator MM1257 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 3 NC VIN VOUT GND 1 2 3 1 2 3 VOUT GND VIN 1 2 4 MMP-4A TO-92A MITSUMI High-Precision Three-Pin Regulator MM1257 Equivalent Circuit Diagram Absolute Maximum Ratings Item Storage temperature Operating temperature Power supply current Output current Maximum Ratings (Ta=25°C) Symbol TSTG TOPR VCC max. IOUT Pd Ratings -40~+125 -20~+75 27 100 200 (MMP-4A), 300 (TO-92A) Units °C °C V mA mW Recommended Operating Conditions Item Input voltage Output current Symbol VIN IO Ratings 7~27 1~100 Units V mA Pin Description Pin no. 1 2 3 4 Pin name N.C VIN VOUT GND ...