FA12 查看數據表（PDF） - California Micro Devices Corp
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FA12 Datasheet PDF : 14 Pages
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150mA/1.2V CMOS LDO Regulator
with Power Good
PRELIMINARY
CM3112
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 (90µA 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 50Ω 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 (500Ω) 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.
Typical Application Circuit
VIN
EN
GND
1kΩ
CM3112-12
IN
OUT
EN
PG
GND
0.1µF*
* Optional
Simplified Electrical Schematic
IN
EN
VOUT
PG
0.1µF*
+
VREF
1.2V
-
+
2.5ms
-
VREF X 0.93
1X
1.2V/150mA
OUT
PG
GND
© 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
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