TC1072 Datasheet, PDF (1/12 Pages) TelCom Semiconductor, Inc – 50mA CMOS LDO WITH SHUTDOWN, ERROR OUTPUT AND VREF BYPASS

50mA CMOS LDO WITH SHUTDOWN,
ERROR OUTPUT AND V_REF BYPASS
PRELIMINARY INFORMATION
TTCC1100772
50mA CMOS LDO WITH SHUTDOWN, ERROR OUTPUT AND V_REF BYPASS
FEATURES
s Zero Ground Current for Longer Battery Life!
s Very Low Dropout Voltage
s Guaranteed 50mA Output
s High Output Voltage Accuracy
s Standard or Custom Output Voltages
s Power-Saving Shutdown Mode
s ERROR Ouput can be Used as a Low Battery
Detector, or Processor Reset Generator
s Bypass Input for Ultra-quiet Operation
s Over-Current and Over-Temperature Protection
s Space-Saving SOT-23A-6 Package
s Pin Compatible Upgrades for Bipolar Regulators
APPLICATIONS
s Battery Operated Systems
s Portable Computers
s Medical Instruments
s Instrumentation
s Cellular / GSM / PHS Phones
s Linear Post-Regulator for SMPS
s Pagers
GENERAL DESCRIPTION
The TC1072 is a high accuracy (typically ±0.5%) CMOS
upgrade for older (bipolar) low dropout regulators. Designed
specifically for battery-operated systems, the TC1072’s
TYPICAL APPLICATION
1M
V_IN
1 _VIN
V_OUT ⁶
V_OUT
1µF
CMOS construction eliminates wasted ground current, sig-
nificantly extending battery life. Total supply current is
typically 50µA at full load (20 to 60 times lower than in bipolar
regulators!).
TC1072 key features include ultra low noise operation
(plus optional Bypass input); very low dropout voltage (typi-
cally 100mV at full load) and internal feed-forward compen-
sation for fast response to step changes in load. An error
output (ERROR) is asserted when the TC1072 is 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 less than 1µA,
and both V_OUT and ERROR are disabled when the shutdown
input is low. The TC1072 incorporates both over-tempera-
ture and over-current protection.
The TC1072 is stable with an output capacitor of only
1µF and has a maximum output current of 50mA. For higher
output current versions, please see the TC1107, TC1108
and TC1073 (I_OUT = 300mA) data sheets.
ORDERING INFORMATION
Part No.
Output
Voltage **(V) Package
Junction
Temp. Range
TC1072-2.5VCH 2.5
SOT-23A-6* – 40°C to +125°C
TC1072-2.7VCH 2.7
SOT-23A-6* – 40°C to +125°C
TC1072-3.0VCH 3.0
SOT-23A-6* – 40°C to +125°C
TC1072-3.3VCH 3.3
SOT-23A-6* – 40°C to +125°C
TC1072-5.0VCH 5.0
SOT-23A-6* – 40°C to +125°C
NOTE: *SOT-23A-6 is equivalent to the EIAJ (SC-74A)
** Other output voltages available. Please contact TelCom
Semiconductor for details
PIN CONFIGURATION
2
TC1072
5
GND
Bypass
3
SHDN
4
ERROR
C_BYPASS
470pF
ERROR
V_{OUT Bypass ERROR}
6
5
4
TC1072
(SOT-23A-6*)
Shutdown Control
(from Power Control Logic)
1
2
3
V_{IN GND SHDN}
TOP VIEW
NOTE: *SOT-23A-6 is equivalent to the EIAJ (SC-74A)
TC1072-01 6/16/97
TelCom Semiconductor reserves the right to make changes in the circuit1ry and specifications ot its devices.