1A LDO. LR9272 Datasheet

LR9272 LDO. Datasheet pdf. Equivalent


UTC LR9272
UNISONIC TECHNOLOGIES CO., LTD
LR9272
Preliminary
SUPER LOW ON RESISTANCE /
LOW VOLTAGE 1A LDO
CMOS IC
DESCRIPTION
The UTC LR9272 is a typical LDO (linear regulator) with the
features of high output voltage accuracy, low supply current, low
ON-resistance, super low dropout, 1A output current capability, and
high ripple rejection.
During operation of the UTC LR9272, the dropout voltage is
very low, Even the output voltage is set at 1.5V, on resistance of
internal FET is typically 0.32. Therefore, applications that require
a large current at small dropout are suitable for the UTC LR9272
series. Low input voltage is acceptable and low output voltage can
be set. The minimum input voltage is 1.4V, and the lowest set
output voltage is 0.8V, and the response of line transient and load
transient are very well.
Internally, there’re many functions of UTC LR9272 which can
be seen in the block figure. There are a voltage reference unit, an
error amplifier, resistor-net for voltage setting, a current limit circuit,
and a chip enable circuit in each UTC LR9272.
The UTC LR9272 can be used as an ideal of the power supply
for hand-held communication equipment, such as: power source for
portable communication equipment, power source for electrical
appliances, for example, cameras, VCRs and camcorders and
power source for battery-powered equipment.
FEATURES
* Low standby current (TYP=0.1µA)
* Ultra-Low supply current (TYP=60µA)
* Output current (MIN=1A@VIN=VOUT+1.0V)
* Output voltage accuracy (±2.0%)
* Input voltage range (1.4V~6.0V)
* Output voltage (0.8V~5.0V)
* Dropout voltage (TYP=0.18V@VOUT=3.0V, IOUT=1A)
ORDERING INFORMATION
* Ripple rejection (TYP=70dB @ VOUT=3.0V)
* Line regulation (TYP=0.05%/V)
* Low temperature-drift coefficient of output voltage
* Built-in thermal shuntdown circuit
* Built-in inrush current limit circuit
* Built-in fold-back protection circuit
* Built-in auto discharge function
Ordering Number
Package
LR9272G-xx-AA3-C-R
SOT-223
LR9272G-xx-AF5-R
SOT-25
Note: xx: Output Voltage, refer to Marking Information.
Pin Assignment
Pin Code 1 2 3
C GIO
Refer to PIN CONFIGURATION
Packing
Tape Reel
Tape Reel
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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LR9272 Datasheet
Recommendation LR9272 Datasheet
Part LR9272
Description SUPER LOW ON RESISTANCE / LOW VOLTAGE 1A LDO
Feature LR9272; UNISONIC TECHNOLOGIES CO., LTD LR9272 Preliminary SUPER LOW ON RESISTANCE / LOW VOLTAGE 1A LDO C.
Manufacture UTC
Datasheet
Download LR9272 Datasheet




UTC LR9272
LR9272
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
SOT-223
SOT-25
25: 2.5V
33: 3.3V
50: 5.0V
Preliminary
CMOS IC
Pin Code
Voltage Code
MARKING
LR9272 G
XX
12 3
Discharge Function
Date Code
PIN CONFIGURATION(For SOT-25)
PIN DESCRIPTION(For SOT-25)
PIN NO.
1
2
3
4
5
PIN NAME
VOUT
GND
VDD
NC
CE or CE
Voltage regulator output pin
Ground pin
Input pin
No connection
Chip enable pin
DESCRIPTION
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R102-067.a



UTC LR9272
LR9272
BLOCK DIAGRAM
VDD
CE
Preliminary
LR9272A
-
+
Vref
current limit/inrush
current limit/thermal
shutdown
LR9272B
VDD
-
+
Vref
current limit/inrush
current limit/thermal
shutdown
CE
CMOS IC
VOUT
GND
VOUT
GND
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 5
QW-R102-067.a





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