FA12 데이터 시트보기 (PDF) - California Micro Devices Corp
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FA12 Datasheet PDF : 14 Pages
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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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