TC1054 Datasheet, PDF (1/12 Pages) TelCom Semiconductor, Inc – 50mA CMOS LDO WITH SHUTDOWN AND ERROR OUTPUT

50mA CMOS LDO WITH SHUTDOWN
AND ERROR OUTPUT
PRELIMINARY INFORMATION
50mA CMOS LDO WITH SHUTDOWN AND ERROR OUTPUT
TTCC1100554
FEATURES
s Zero Ground Current for Longer Battery Life
s Very Low Dropout Voltage
s Guaranteed 50mA Output
s High Output Voltage Accuracy
s Standard or Custom Output Voltages
s Power-Saving Shutdown Mode
s ERROR Output can be Used as a Low Battery
Detector, or Processor Reset Generator
s Over-Current and Over-Temperature Protection
s Space-Saving SOT-23A-5 Package
s Pin Compatible Upgrades for Bipolar Regulators
APPLICATIONS
s Battery Operated Systems
s Portable Computers
s Medical Instruments
s Instrumentation
s Cellular/GSMS/PHS Phones
s Linear Post-Regulators for SMPS
s Pagers
ORDERING INFORMATION
Part No.
Output
Voltage **(V) Package
Junction
Temp. Range
TC1054-2.5VCT 2.5
SOT-23A-5* – 40°C to +125°C
TC1054-2.7VCT 2.7
SOT-23A-5* – 40°C to +125°C
TC1054-3.0VCT 3.0
SOT-23A-5* – 40°C to +125°C
TC1054-3.3VCT 3.3
SOT-23A-5* – 40°C to +125°C
TC1054-5.0VCT 5.0
SOT-23A-5* – 40°C to +125°C
NOTE: *SOT-23A-5 is equivalent to the EIAJ (SC-74A)
** Other output voltages available. Please contact TelCom
Semiconductor for details
PIN CONFIGURATION
V_OUT
5
ERROR
4
GENERAL DESCRIPTION
The TC1054 is a high accuracy (typically ±0.5%) CMOS
upgrade for older (bipolar) low dropout regulators. De-
signed specifically for battery-operated systems, the
TC1054’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!).
TC1054 key features include ultra low noise operation,
very low dropout voltage (typically 100mV at full load) and
internal feed-forward compensation for fast response to
step changes in load. An error output (ERROR) is asserted
when the TC1054 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 TC1054
incorporates both over-temperature and over-current pro-
tection.
The TC1054 is stable with an output capacitor of only
1µF and has a maximum output current of 50mA. For higher
output current regulators, please see the TC1055
(I_OUT = 100mA) regulator and TC1107, TC1108 (I_OUT =
300mA) data sheets.
TYPICAL APPLICATION
V_IN
1 _VIN
V_OUT ⁵
V_OUT
1µF
2
GND
TC1054
1M
3
SHDN
4
ERROR
ERROR
TC1054
(SOT-23A-5*)
1
2
3
TOP VIEW
V_IN GND SHDN
NOTE: *SOT-23A-5 is equivalent to the EIAJ (SC-74A)
Shutdown Control
(from Power Control Logic)
TC1054-01 6/12/97 TelCom Semiconductor reserves the right to make changes in the circuitry1and specifications of its devices