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CM3112-12ST Datasheet(PDF) 2 Page - California Micro Devices Corp |
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CM3112-12ST Datasheet(HTML) 2 Page - California Micro Devices Corp |
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2 / 14 page  © 2004 California Micro Devices Corp. All rights reserved. 2 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com 01/20/04 CM3112 PRELIMINARY Ordering Information Note 1: Parts are shipped in Tape & Reel form unless otherwise specified. PIN DESCRIPTIONS PIN NAME DESCRIPTION 1 IN Positive input voltage for the regulator. The internal loading on this input is typically 300 µA when- ever the regulator is enabled, and less than 10 µA when the regulator is disabled. If the IN pin is within a few inches of the main input filter, a capacitor may not be necessary. Otherwise an input fil- ter capacitor (CIN) of 0.1uF to 1uF will ensure adequate filtering. 2 GND The negative reference for all voltages. 3 EN Enable/shutdown input. When EN is asserted high (VEN ≥ 1.6V), the regulator is enabled. When EN is asserted low (VEN ≤0.4V), the regulator’s series pass transistor is forced into a high impedance mode and an internal discharge resistance (500 Ω) is applied to the output to quickly reduce the out- put voltage to 0 volts. 4 PG Power Good output. This is an open drain output and functions as a supply voltage supervisor for the output voltage. It is asserted low when the output falls below 84% of its nominal value. This out- put becomes inactive when (EN > 1.5V), (2.5V < VIN < 5.5V) and (VOUT > 97% of VOUTNOM), all of which are valid for more than 1-10ms. 5 OUT The regulated voltage output. Although an output capacitor is not necessary for stable regulator operation, a optional 0.1uF capacitor can be used to provide an added measure of output stability. PACKAGE / PINOUT DIAGRAM Note: This drawing is not to scale. 5-pin SOT23 IN GND EN OUT PG 1 2 5 3 4 Top View PART NUMBERING INFORMATION Regulator Pins Package Standard Finish Lead-free Finish Ordering Part Number1 Part Marking Ordering Part Number1 Part Marking CM3112-12 5 SOT23-5 CM3112-12ST FA12 CM3112-12SO FB12 |
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