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PDF LR9272 Data sheet ( Hoja de datos )
| Número de pieza | LR9272 | |
| Descripción | SUPER LOW ON RESISTANCE / LOW VOLTAGE 1A LDO | |
| Fabricantes | Unisonic Technologies | |
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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 0.32Ω. 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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QW-R102-067.a
1 page  
LR9272
Preliminary
TYPICAL APPLICATION CIRCUIT
CMOS IC
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R102-067.a
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| PDF Descargar | [ Datasheet LR9272.PDF ] | |
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