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參數(shù)資料
| 型號： | CM3112-12ST |
| 廠商： | California Micro Devices Corporation |
| 英文描述： | 150mA/1.2V CMOS LDO Regulator |
| 中文描述： | 150mA/1.2V的CMOS LDO穩(wěn)壓器 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大小： | 277K |
| 代理商： | CM3112-12ST |
2004 California Micro Devices Corp. All rights reserved.
01/20/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
L
Tel: 408.263.3214
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Fax: 408.263.7846
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www.calmicro.com
1
CM3112
PRELIMINARY
150mA/1.2V CMOS LDO Regulator
with Power Good
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 (90
μ
A 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 50
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 (500
) 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.
Simplified Electrical Schematic
Typical Application Circuit
IN
EN
OUT
GND
0.1
μ
F*
V
OUT
GND
CM3112-12
PG
1k
V
IN
PG
EN
* Optional
0.1
μ
F*
EN
+
IN
GND
OUT
-
V
1.2V
2.5ms
-
+
V
REF
X 0.93
1X
PG
1.2V/150mA
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