L1138 Datasheet, PDF (1/8 Pages) Unisonic Technologies – HIGH RIPPLE-REJECTION AND LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR

UNISONIC TECHNOLOGIES CO., LTD
L1138
Preliminary
HIGH RIPPLE-REJECTION AND
LOW DROPOUT HIGH OUTPUT
CURRENT CMOS VOLTAGE
REGULATOR
CMOS IC
SOP-8
„ DESCRIPTION
The UTC L1138 is a positive LDO (voltage regulator) by applying
CMOS technology. It is featured as: low dropout voltage, high output
voltage accuracy, and low current consumption.
The internal circuits include low on-resistance transistor featured as a
low dropout voltage and large output current, overcurrent protector to
make sure the load current don’t exceed the current capacitance of the
output transistor, thermal shutdown circuit to make sure the heat won’t
damage the chip and ON/OFF circuit to keep the battery life longer.
In applications, the UTC L1138 can be used equipment, such as
power supplies for DVD, CD-ROM drives, battery-powered devices,
personal communication devices, and personal communication devices.
„ FEATURES
* Output voltage‘s high accuracy: ±1.0%
* Low dropout voltage:
120mV typ.
@3.0V output , I_OUT=300mA
* Low current consumption:
80μA(Typ.)160μA max in operation
0.1μA(Typ.)1.0μA max in shutdown
mode
* High current capability:
800mA output
@V_IN≥V_OUT(S)+1.0V
* With ON/OFF circuit:
Ensures long battery life.
* Low ESR capacitor can be used: at least a 4.7μF ceramic capacitor for
the output capacitor.
* High ripple rejection
70dB typ@1.0kHz
* With over current protector
* With thermal shutdown circuit
* Halogen Free
„ ORDERING INFORMATION
Ordering Number
Package
L1138G-xx-AB5-R
SOT-89-5
L1138G-xx-S08-R
SOP-8
xx: Output Voltage, refer to Marking Information.
1
SOT-89-5
Packing
Tape Reel
Tape Reel
www.unisonic.com.tw
Copyright © 2009 Unisonic Technologies Co., Ltd
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