CM3102 Datasheet, PDF (1/9 Pages) California Micro Devices Corp – Micropower 1.2V/150mA CMOS LDO Regulator with Power Good

CM3102
Micropower 1.2V/150mA CMOS LDO Regulator
with Power Good
Features
• 1-5ms 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
• Stable with low-ESR capacitors
• SOT23-5 package
• "MIC5258" pinout
• Lead-free version available
Applications
• Pentium^ 4 Motherboards
• Processor Power-up Sequencing
• Desktop, Notebook and Palmtop Computers
• PC Cards
• Peripheral Adapter Cards
Product Description
The CM3102 is a low quiescent current (90uA) regula-
tor that delivers up to 150mA of load current at a fixed
1.2V output. In addition, the CM3102 features a Power
Good output signal (PG) that goes open drain 1 to 5
ms after the output voltage has exceeded typically 93%
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 resistance (500Ω) will force the
output to ground whenever the device has been shut-
down.
The CM3102 is fully protected, offering both overload
current limiting and high temperature thermal shut-
down.
Available in a tiny SOT23 package, the device is ideal
for space critical applications.
The CM3102 is available with optional lead-free finish-
ing.
Pentium^ 4 Motherboard
Application Circuit
CM3102-12Sx
10Ω
VCC3
IN
OUT
EN
PG
GND
.1µF*
1.2V
VCCVID
PG
.1µF
* Input capacitor optional.
Typical Application Circuit
47kΩ
CM3102-12Sx
V_IN
IN
OUT
V_OUT
EN
EN
PG
PG
GND
1µF*
1µF
Simplified Electrical Schematic
IN
EN
GND
+
V_REF
1.2V
-
+
2.5ms
-
V_REF X 0.93
1X
1.2V/150mA
OUT
PG
GND
* Input capacitor optional.
© 2004 California Micro Devices Corp. All rights reserved.
01/20/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: [phone] L Fax: [phone] L www.calmicro.com
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