100mA CMOS LDO WITH SHUTDOWN,
ERROR OUTPUT AND V
REF
BYPASS
PRELIMINARY INFORMATION
TC1073
TC1073
100mA CMOS LDO WITH SHUTDOWN, ERROR OUTPUT AND V
REF
BYPASS
FEATURES
s
s
s
s
s
s
s
s
s
s
s
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
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 50µA 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 1µA,
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
1µF and has a maximum output current of 100mA. For
higher output current versions, please see the TC1107,
TC1108 (I
OUT
= 300mA) data sheets.
APPLICATIONS
s
s
s
s
s
s
s
Battery Operated Systems
Portable Computers
Medical Instruments
Instrumentation
Cellular / GSM / PHS Phones
Linear Post-Regulator for SMPS
Pagers
TYPICAL APPLICATION
1M
ORDERING INFORMATION
Part No.
Output
Voltage**
2.5V
2.7V
3.0V
3.3V
5.0V
Package
Junction
Temp. Range
V
IN
1
V
IN
V
OUT
6
V
OUT
1µF
TC1073-2.5VCH
TC1073-2.7VCH
TC1073-3.0VCH
TC1073-3.3VCH
TC1073-5.0VCH
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
2
GND
TC1073
Bypass
5
C
BYPASS
470pF
NOTE:
*SOT-23A-6 is equivalent to the EIAJ (SC-74)
** Other output voltages available. Please contact TelCom
Semiconductor for details
3
4
SHDN
ERROR
ERROR
PIN CONFIGURATION
V
OUT
Bypass ERROR
6
5
4
Shutdown Control
(from Power Control Logic)
TC1073
(SOT-23A-6*)
1
V
IN
2
3
TOP VIEW
GND SHDN
NOTE:
*SOT-23A-6 is equivalent to the EIAJ (SC-74)
TC1073-01 6/5/97
1
TelCom Semiconductor reserves the right to make changes in the circuitry and specifications ot its devices.
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
