TC1173 Datasheet, PDF (1/7 Pages) TelCom Semiconductor, Inc – 300mA CMOS LDO with Shutdown, ERROR Output and Bypass

TC1173
300mA CMOS LDO with Shutdown, ERROR Output and Bypass
FEATURES
GENERAL DESCRIPTION
s Extremely Low Supply Current for Longer Battery
Life!
s Very Low Dropout Voltage
s Guaranteed 300mA Output
s Standard or Custom Output Voltages
s ERROR Output Can be Used as a Low Battery
Detector or Processor Reset Generator
s Power-Saving Shutdown Mode
s Bypass Input for Ultra-Quiet Operation
s Over-Current and Over-Temperature Protection
s Space-Saving MSOP Package Option
APPLICATIONS
s Battery-Operated Systems
s Portable Computers
s Medical Instruments
s Instrumentation
s Cellular / GSM / PHS Phones
s Linear Post-Regulator for SMPS
s Pagers
TYPICAL APPLICATION
1
VOUT
C1
1µF
2
GND
8
VIN
7
NC
TC1173
3
6
NC
SHDN
VIN
R3
1M
4 _Bypass
5
ERROR
ERROR
C_BYPASS
470pF
(Optional)
Shutdown Control
(from Power Control Logic)
The TC1173 is a precision output (typically ±0.5%)
CMOS low dropout regulator. Total supply current is typi-
cally 50µA at full load (20 to 60 times lower than in bipolar
regulators!).
TC1173 key features include ultra low noise operation
(plus optional Bypass input); very low dropout voltage
(typically 240mV at full load) and internal feed-forward
compensation for fast response to step changes in load. An
error output (ERROR) is asserted when the TC1173 is out-
of-regulation (due to a low input voltage or excessive output
current). ERROR can be set as a low battery warning or as
a processor RESET signal (with the addition of an external
RC network). Supply current is reduced to 0.05µA (typical)
and V_OUT and ERROR fall to zero when the shutdown input
is low.
The TC1173 incorporates both over-temperature and
over-current protection. The TC1173 is stable with an output
capacitor of only 1µF and has a maximum output current of
300mA.
ORDERING INFORMATION
Part
Number
Package
Junction
Temp. Range
TC1173-xxVOA
TC1173-xxVUA
8-Pin SOIC
8-Pin MSOP
– 40°C to +125°C
– 40°C to +125°C
Available Output Voltages:
2.5, 2.8, 3.0, 3.3, 5.0
xx indicates output voltages
Other output voltages are available. Please contact TelCom
Semiconductor for details.
PIN CONFIGURATION
MSOP
V_OUT ¹
GND ²
8 V_IN
7 NC
NC ³ TC1173VUA 6 SHDN
Bypass ⁴
5 ERROR
SOIC
V_OUT 1
GND 2
8 V_IN
7 NC
NC 3 TC1173VOA 6 SHDN
Bypass 4
5 ERROR
TC1173-2 2/2/00 TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices.