CM3112-12SO Ver la hoja de datos (PDF) - California Micro Devices Corp

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Fabricante

CM3112-12SO

150mA/1.2V CMOS LDO Regulator with Power Good

California Micro Devices Corp 

PACKAGE / PINOUT DIAGRAM

Top View

IN

1

5

OUT

GND

2

Note: This drawing is not to scale.

EN

3

4

PG

5-pin SOT23

PRELIMINARY

CM3112

PIN DESCRIPTIONS

PIN

NAME DESCRIPTION

1

IN

Positive input voltage for the regulator. The internal loading on this input is typically 300µA when-

ever the regulator is enabled, and less than 10µA 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 (500Ω) 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.

Ordering Information

PART NUMBERING INFORMATION

Regulator

CM3112-12

Pins

5

Package

SOT23-5

Standard Finish

Ordering Part

Number1

Part Marking

CM3112-12ST

FA12

Lead-free Finish

Ordering Part

Number1

Part Marking

CM3112-12SO

FB12

Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.

© 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

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