PRELIMINARY INFORMATION
100mA ADJUSTABLE CMOS
LDO WITH SHUTDOWN
TC1071
TC1071
100mA ADJUSTABLE CMOS LDO WITH SHUTDOWN
FEATURES
GENERAL DESCRIPTION
■ Zero Ground Current for Longer Battery Life!
■ Adjustable Output Voltage
■ Very Low Dropout Voltage
The TC1071 is an adjustable LDO designed to super-
cede a variety of older (bipolar) voltage regulators. De-
signed specifically for battery-operated systems, the
TC1070’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!).
■ Guaranteed 100mA Output
■ Power-Saving Shutdown Mode
■ Over-Current and Over-Temperature Protection
■ Space-Saving SOT-23A-5 Package
■
Pin Compatible with LP2980 and MIC5205 Regulators
TC1071 key features include ultra low noise operation
very low dropout voltage (typically 200mV at full load) and
internal feed-forward compensation for fast response to
step changes in load. Supply current is reduced to less than
1µA when the shutdown input is low. The TC1071 incorpo-
rates both over-temperature and over-current protection.
Output voltage is programmed with a simple resistor divider
from VOUT to ADJ.
The TC1071 is stable with an output capacitor of only
1µF and has a maximum output current of 100mA. For
higher output versions, please see the TC1174
(IOUT = 300mA) data sheet.
APPLICATIONS
■ Battery Operated Systems
■ Portable Computers
■ Medical Instruments
■ Instrumentation
■ Cellular / GSM / PHS Phones
■ Linear Post-Regulator for SMPS
■ Pagers
ORDERING INFORMATION
TYPICAL APPLICATION
Output
Junction
Part No.
Voltage **(V) Package
Temp. Range
TC1071VCT
Adjustable
SOT-23A-5* – 40°C to +125°C
1
5
V
V
V
V
OUT
IN
IN
OUT
NOTE: *SOT-23A-5 is equivalent to the EIAJ (SC-74A)
**Other output voltages available. Please contact TelCom
Semiconductor for details
C1
1µF
TC1071
2
3
GND
PIN CONFIGURATION
R1
R2
VOUT
5
ADJ
4
4
ADJ
SHDN
TC1071
(SOT-23A-5*)
TOP VIEW
2
3
1
Shutdown Control
(from Power Control Logic)
VIN
GND
V
V
R2
+ 1
SHDN
OUT
=
REF
x
[ ]
R1
NOTE: *SOT-23A-5 is equivalent to the EIAJ (SC-74A)
1
TelCom Semiconductor reserves the right to make changes in the circuitry and specifications ot its devices.
TC1071-01 6/13/97
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
