PRELIMINARY INFORMATION
100mA CMOS LDO WITH SHUTDOWN,
ERROR OUTPUT AND VREF BYPASS
TC1073
TC1073
100mA CMOS LDO WITH SHUTDOWN, ERROR OUTPUT AND VREF BYPASS
FEATURES
GENERAL DESCRIPTION
■ 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
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). ERRORcanbeusedasalowbatterywarningoras
a processor RESET signal (with the addition of an external
RC network). Supply current is reduced to less than 1µA,
andbothVOUT andERRORaredisabledwhentheshutdown
input is low. The TC1073 incorporates both over-tempera-
ture and over-temeprature protection.
APPLICATIONS
■ Battery Operated Systems
■ Portable Computers
■ Medical Instruments
■ Instrumentation
■ Cellular / GSM / PHS Phones
■ Linear Post-Regulator for SMPS
■ Pagers
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 (IOUT = 300mA) data sheets.
TYPICAL APPLICATION
ORDERING INFORMATION
Output
Junction
1M
Part No.
Voltage** Package
Temp. Range
1
TC1073-2.5VCH
TC1073-2.7VCH
TC1073-3.0VCH
TC1073-3.3VCH
TC1073-5.0VCH
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
6
V
V
V
V
OUT
IN
IN
OUT
1µF
TC1073
2
3
5
4
GND
Bypass
ERROR
C
NOTE: *SOT-23A-6 is equivalent to the EIAJ (SC-74)
** Other output voltages available. Please contact TelCom
Semiconductor for details
BYPASS
470pF
SHDN
ERROR
PIN CONFIGURATION
VOUT
ERROR
4
Bypass
5
6
Shutdown Control
(from Power Control Logic)
TC1073
(SOT-23A-6*)
TOP VIEW
2
3
1
VIN
GND
SHDN
NOTE: *SOT-23A-6 is equivalent to the EIAJ (SC-74)
1
TelCom Semiconductor reserves the right to make changes in the circuitry and specifications ot its devices.
TC1073-01 6/5/97
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
