TC1073
PRELIMINARY INFORMATION
TC1073-01 6/5/97
100mA CMOS LDO WITH SHUTDOWN,
ERROR OUTPUT AND V
REF
BYPASS
GENERAL DESCRIPTION
The TC1073 is a high accuracy (typically
±
0.5%) CMOS
upgrade for older (bipolar) low dropout regulators such as
the LP2980. Designed specifically for battery-operated sys-
tems, the TC1073’s CMOS construction eliminates wasted
ground current, significantly extending battery life. Total
supply current is typically 50
μ
A at full load (20 to 60 times
lower than in bipolar regulators).
TC1073 key features include ultra low noise operation
(plus optional Bypass input); very low dropout voltage (typi-
cally 200mV 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 TC1073 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 TC1073 incorporates both over-tempera-
ture and over-temeprature protection.
The TC1073 is stable with an output capacitor of only
1
μ
F and has a maximum output current of 100mA. For
higher output current versions, please see the TC1107,
TC1108 (I
OUT
= 300mA) data sheets.
FEATURES
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Zero Ground Current for Longer Battery Life!
Very Low Dropout Voltage
Guaranteed 100mA 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
100mA 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.
1
μ
F
Shutdown Control
(from Power Control Logic)
TC1073
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**
Junction
Package
Part No.
Temp. Range
TC1073-2.5VCH
TC1073-2.7VCH
TC1073-3.0VCH
TC1073-3.3VCH
TC1073-5.0VCH
NOTE:
** Other output voltages available. Please contact TelCom
Semiconductor for details
2.5V
2.7V
3.0V
3.3V
5.0V
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
*SOT-23A-6 is equivalent to the EIAJ (SC-74)
NOTE:
*SOT-23A-6 is equivalent to the EIAJ (SC-74)
TC1073
(SOT-23A-6*)
TOP VIEW
1
3
5
4
6
2
SHDN
ERROR
GND
V
OUT
Bypass
V
IN