TC1173 Datasheet, PDF (1/12 Pages) TelCom Semiconductor, Inc – 300mA CMOS LDO with Shutdown, ERROR Output and Bypass

TC1173
300mA CMOS LDO with Shutdown ERROR Output and Bypass
Features
• Extremely Low Supply Current for Longer Battery Life
• Very Low Dropout Voltage
• 300mA Output Current
• Standard or Custom Output Voltages
• ERROR Output Can Be Used as a Low Battery
Detector or Processor Reset Generator
• Power Saving Shutdown Mode
• Bypass Input for Ultra Quiet Operation
• Over Current and Over Temperature Protection
• Space-Saving MSOP Package Option
Applications
• Battery Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Cellular/GSM/PHS Phones
• Linear Post-Regulators for SMPS
• Pagers
Device Selection Table
Part Number
TC1173-xxVOA
TC1173-xxVUA
Package
8-Pin SOIC
8-Pin MSOP
Junction
Temp. Range
-40°C to +125°C
-40°C to +125°C
NOTE: xx indicates output voltages
Available Output Voltages: 2.5, 2.8, 3.0, 3.3, 5.0.
Other output voltages are available. Please contact Microchip
Technology Inc. for details.
Package Type
8-Pin MSOP
V_OUT 1
8 V_IN
GND
2
TC1173VUA
7
NC
NC ³
6 SHDN
Bypass ⁴
5 _ERROR
General Description
The TC1173 is a precision output (typically ±0.5%)
CMOS low dropout regulator. Total supply current is
typically 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 VOUT 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.
Typical Application
V_OUT
1
+ _C1 ^VOUT
1µF
2
GND
8
V_IN
7
NC
TC1173
3
NC
6
SHDN
V_IN
R3
1M
4
5
Bypass ERROR
ERROR
C_BYPASS
470pF
(Optional)
Shutdown Control
(from Power Control Logic)
8-Pin SOIC
V_OUT 1
8 V_IN
GND 2
7 NC
TC1173VOA
NC 3
6 _SHDN
Bypass 4
5 ERROR
© 2002 Microchip Technology Inc.
DS21362B-page 1