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UNISONIC TECHNOLOGIES CO., LTD
L1188
Preliminary
800mA CMOS LDO
„ DESCRIPTION
As UTC LDO, the features of the UTC L1188 include low
quiescent current and very low dropout voltage.
In order prevent form the bad operating conditions, there are
internal thermal shutdown and current fold-back. For stably
operation, the UTC L1188 should be connected to an output
capacitance of 2.2μF or larger.
The UTC L1188 can be an ideal for battery applications, such as
portable electronics, wireless devices, cordless phones, PC
peripherals and battery powered widgets.
„ FEATURES
* Extra Low Dropout Voltage
* Output Current: 800mA (Guaranteed)
* Output Voltage Accuracy:±1.5%
* Quiescent Current: 30μA
* Internal Over-Temperature Shutdown
* With Current limiting
* Internal Short Circuit Current Fold-Back
* Pre-set Output Voltages In Factory
* Very Low Temperature Coefficient
„ ORDERING INFORMATION
Ordering Number
Package
L1188G-xx-AA3-A-R
SOT-223
Note: Pin Assignment: G:GND O:VOUT I:VIN
xx: Output Voltage, refer to Marking Information.
Pin Assignment
123
GO
I
CMOS IC
1
SOT-223
Packing
Tape Reel
www.DataSheet4U.com
www.unisonic.com.tw
Copyright © 2010 Unisonic Technologies Co., Ltd
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L1188
„ MARKING INFORMATION
PACKAGE
VOLTAGE CODE
Preliminary
SOT-223
28 :2.8V
33:3.3V
MARKING
„ PIN CONFIGURATION
CMOS IC
„ PIN DESCRIPTION
PIN NO.
1
2
3
PIN NAME
GND
VOUT
VIN
DESCRIPTION
Ground.
Output voltage pin which should be decoupled with a ceramic capacitor
(Value: 2.2µF or larger and low ESR).
Input voltage pin which should be decoupled with 1µF or greater capacitor.
www.DataSheet4U.com
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-324.c

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L1188
„ BLOCK DIAGRAM
VIN
Preliminary
Overcurrrent
Shutdown
Thermal
Shutdown
CMOS IC
VREF=1.215V
AMP
VOUT
R1
R2
GND
www.DataSheet4U.com
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-324.c