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TC1073 Datasheet(PDF) 2 Page - Microchip Technology

Part No. TC1073
Description  50mA and 100mA CMOS LDOs with Shutdown, ERROR Output and VREF Bypass
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Maker  MICROCHIP [Microchip Technology]
Homepage  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC1073 Datasheet(HTML) 2 Page - Microchip Technology

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TC1072/TC1073
DS21354B-page 2
© 2002 Microchip Technology Inc.
General Description
The TC1072 and TC1073 are high accuracy (typically
±0.5%) CMOS upgrades for older (bipolar) low dropout
regulators. Designed specifically for battery-operated
systems, the devices’ CMOS construction eliminates
wasted ground current, significantly extending battery
life. Total supply current is typically 50
µA at full load (20
to 60 times lower than in bipolar regulators).
The devices’ key features include ultra low noise
operation (plus optional Bypass input); very low
dropout voltage (typically 85mV, TC1072 and 180mV,
TC1073 at full load) and fast response to step changes
in load. An error output (ERROR) is asserted when the
devices are out-of-regulation (due to a low input
voltage or excessive output current). ERROR can be
used as a low battery warning or as a processor
RESET signal (with the addition of an external RC
network). Supply current is reduced to 0.5
µA(max) and
both VOUT and ERROR are disabled when the
shutdown input is low. The devices incorporate both
over-temperature and over-current protection.
The TC1072 and TC1073 are stable with an output
capacitor of only 1
µF and have a maximum output
current of 50mA, and 100mA respectively. For higher
output current versions, please see the TC1185,
TC1186, TC1187 (IOUT = 150mA) and TC1107, TC1108
and TC1173 (IOUT = 300mA) data sheets.
Typical Application
TC1072
TC1073
VOUT
GND
1
µF
+
VIN
VIN
VOUT
1
6
2
4
3
SHDN
Shutdown Control
(from Power Control Logic)
ERROR
ERROR
Bypass
CBYPASS
470pF
5
RP


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