CM3102 Datasheet, PDF (2/9 Pages) California Micro Devices Corp – Micropower 1.2V/150mA CMOS LDO Regulator with Power Good

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
CM3102
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 1µA when the regulator is disabled. Although an input
filter capacitor is not required, it is recommended that a 1µF ceramic capacitor be used for addi-
tional filtering and stability if this pin is greater than 2 inches from the main input filter.
2
GND The negative reference for all voltages.
3
EN
Enable/shutdown input. When EN is asserted high (V_EN ≥ 1.6V), the regulator is enabled. When EN
is asserted low (V_EN ≤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 89% of its nominal value. This out-
put becomes inactive when V_OUT remains above 97% of its nominal value for 1 to 5ms.
5
OUT The regulated voltage output. An output capacitor of 1µF is recommended to minimize any tran-
sient load disturbances under normal operating conditions. Additional output capacitance can be
used to further improve transient load response.
Ordering Information
PART NUMBERING INFORMATION
Standard Finish
Regulator
CM3102-12
Pins
5
Package
SOT23-5
Ordering Part
Number¹
CM3102-12ST
Part Marking
BA12
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
Lead-free Finish
Ordering Part
Number¹
Part Marking
CM3102-12SO
BB12
© 2004 California Micro Devices Corp. All rights reserved.
2 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: [phone]
L Fax: [phone] L www.calmicro.com
01/20/04