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CM3112-12SO Datasheet(PDF) 1 Page - California Micro Devices Corp |
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CM3112-12SO Datasheet(HTML) 1 Page - California Micro Devices Corp |
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1 / 14 page  © 2004 California Micro Devices Corp. All rights reserved. 01/20/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com 1 CM3112 PRELIMINARY 150mA/1.2V CMOS LDO Regulator with Power Good Features • LDO regulator with Power Good • No capacitor required on the LDO output • Power Good (PG) control signal • Regulated 1.2V output • 150mA output current • Low quiescent operating current (90 µA typical) • "Zero" disable mode current • Foldback current limiting protection • Thermal shutdown protection • SOT23-5 package • Micrel MIC5258, MIC5268 compatible pinout • Lead-free version available Applications •Pentium 4 Motherboards • PC Cards • Peripheral Adapter Cards Product Description The CM3112-12 is a low quiescent current (90uA) reg- ulator that delivers up to 150mA of load current at a fixed 1.2V output. All the necessary circuitry has been included to deliver a 50 Ω power good signal (open drain) which remains for 5ms after the output has exceeded 90% (typ) of its nominal level. A dedicated control input (EN, Active High) has been included for power-up sequencing flexibility. When this input is taken low, the regulator is disabled. In this state, the supply current will drop to near zero. An inter- nal discharge MOSFET (500 Ω) resistance will force the output to ground whenever the device has been shut- down. The CM3112-12 is fully protected, offering both over- load current limiting and high temperature thermal shutdown. Housed in a tiny SOT23 package, the device is ideal for space critical applications and is also available with optional lead-free finishing. Simplified Electrical Schematic Typical Application Circuit IN EN OUT GND 0.1 µF* VOUT GND CM3112-12 PG 1k Ω VIN PG EN * Optional 0.1 µF* EN + IN GND OUT - VREF 1.2V 2.5ms + - VREF X 0.93 1X PG 1.2V/150mA |
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