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LT1120CJ8 Datasheet(PDF) 1 Page - Linear Technology

Part # LT1120CJ8
Description  Micropower Regulator with Comparator and Shutdown
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1120CJ8 Datasheet(HTML) 1 Page - Linear Technology

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1
LT1120
1120fc
TYPICAL APPLICATIO
APPLICATIO S
FEATURES
DESCRIPTIO
Micropower Regulator with
Comparator and Shutdown
The LT
®1120 is a combination micropower positive regu-
lator and free collector comparator on a single monolithic
chip. With only 40
µA supply current, the LT1120 can
supply over 125mA of output current. Input voltage range
is from 4.5V to 36V and dropout voltage is 0.6V at 125mA.
Dropout voltage decreases with lower load currents. Also
included on the chip is a class B output 2.5V reference that
can either source or sink current. A shutdown pin allows
logic shutdown of the output.
The comparator can be used for system or battery moni-
toring. For example, the comparator can be used to warn
of low system voltage. Frequency compensation of the
comparator for amplifier applications can be obtained by
adding external output capacitance.
The 2.5V reference will source or sink current. This allows
it to be used as a supply splitter or auxiliary output.
s
40
µA Supply Current
s
125mA Output Current
s
2.5V Reference Voltage
s
Reference Output Sources 2mA and Sinks 2mA
s
Open Collector Comparator Sinks 10mA
s
Logic Shutdown
s
0.2V Dropout Voltage
s
Thermal Limiting
s
Available in 8-Lead DIP and SO Packages
s
Battery Systems
s
Battery-Backup System
s
Portable Terminals
s
Portable Instruments
s
Memory Keep-Alive
, LTC and LT are registered trademarks of Linear Technology Corporation.
5V Regulator
Dropout Voltage and Supply Current
OUTPUT CURRENT (mA)
0.1
1
0.01
0.10
1.00
0.1
1
10
10
100
1000
1120 TA02
+
+
VIN
VOUT
FB
GND
SHDN
SHUTDOWN
LT1120
4
0.001
µF1M
1M
25
µF
5V
VIN > 5.2V
IQ = 40µA
1120 TA01
10
µF
2
1
3
5


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