TC1072
PRELIMINARY INFORMATION
TC1072-01
6/16/97
50mA CMOS LDO WITH SHUTDOWN,
ERROR OUTPUT AND V
REF
BYPASS
FEATURES
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Zero Ground Current for Longer Battery Life!
Very Low Dropout Voltage
Guaranteed 50mA Output
High Output Voltage Accuracy
Standard or Custom Output Voltages
Power-Saving Shutdown Mode
ERROR Ouput can be Used as a Low Battery
Detector, or Processor Reset Generator
Bypass Input for Ultra-quiet Operation
Over-Current and Over-Temperature Protection
Space-Saving SOT-23A-6 Package
Pin Compatible Upgrades for Bipolar Regulators
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APPLICATIONS
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Battery Operated Systems
Portable Computers
Medical Instruments
Instrumentation
Cellular / GSM / PHS Phones
Linear Post-Regulator for SMPS
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
50mA CMOS LDO WITH SHUTDOWN, ERROR OUTPUT AND V
REF
BYPASS
TYPICAL APPLICATION
TelCom Semiconductor reserves the right to make changes in the circuitry and specifications ot its devices.
CMOS construction eliminates wasted ground current, sig-
nificantly extending battery life. Total supply current is
typically 50
μ
A at full load (20 o 60 imes ower han n 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 1
μ
A,
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
1
μ
F 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.
1
μ
F
Shutdown Control
(from Power Control Logic)
TC1072
V
IN
1
1M
2
3
4
6
5
V
IN
V
OUT
ERROR
Bypass
C
BYPASS
SHDN
GND
V
OUT
ERROR
PIN CONFIGURATION
ORDERING INFORMATION
Output
Voltage **(V) Package
Junction
Part No.
Temp. Range
TC1072-2.5VCH
TC1072-2.7VCH
TC1072-3.0VCH
TC1072-3.3VCH
TC1072-5.0VCH
NOTE:
*SOT-23A-6 is equivalent to the EIAJ (SC-74A)
** Other output voltages available. Please contact TelCom
Semiconductor for details
2.5
2.7
3.0
3.3
5.0
SOT-23A-6* – 40
°
C to +125
°
C
SOT-23A-6* – 40
°
C to +125
°
C
SOT-23A-6* – 40
°
C to +125
°
C
SOT-23A-6* – 40
°
C to +125
°
C
SOT-23A-6* – 40
°
C to +125
°
C
NOTE:
*SOT-23A-6 is equivalent to the EIAJ (SC-74A)
TC1072
(SOT-23A-6*)
TOP VIEW
1
3
5
4
6
2
SHDN
ERROR
GND
V
OUT
Bypass
V
IN