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PDF TC1173 Data sheet ( Hoja de datos )
| Número de pieza | TC1173 | |
| Descripción | 300mA CMOS LDO with Shutdown ERROR Output and Bypass | |
| Fabricantes | TelCom | |
| Logotipo |  |
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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
36
NC SHDN
VIN
R3
1M
4 Bypass
5
ERROR
ERROR
CBYPASS
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 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.
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
VOUT 1
GND 2
8 VIN
7 NC
NC 3 TC1173VUA 6 SHDN
Bypass 4
5 ERROR
SOIC
VOUT 1
GND 2
8 VIN
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.
1 page  
300mA CMOS LDO With Shutdown,
ERROR Output, And Bypass
TYPICAL CHARACTERISTICS
0.012
Line Regulation
0.010
0.008
0.006
0.004
0.002
0.000
–0.002
–0.004
–40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
100.0
90.0
Supply Current
80.0
70.0
60.0
50.0
40.0
–40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
–30dB
–35dB
–40dB
Power Supply Rejection Ratio
VOUT = 5V
RLOAD = 50Ω
VINAC = 50mV p-p
–45dB
–50dB
–55dB
–60dB
COUT = 1µF
–65dB
–70dB
–75dB
–80dB
10 100 1K 10K 100K 1M
FREQUENCY (KHz)
TC1173
10.0
1.0
Output Noise
RLOAD = 50Ω
COUT = 1µF
0.1
0.0
0.01
0.01 1
10 100
FREQUENCY (KHz)
1000
0.40
0.35
0.30
0.25
0.20
0.15
Dropout Voltage vs. Load Current
125°C
85°C
70°C
25°C
0°C
0.10
0.05
–40°C
0.00
0
50 100 150 200 250 300
LOAD CURRENT (mA)
2.00
1.80
Load Regulation
1.60
1.40
1 to 300mA
1.20
1.00
0.80
0.60
1 to 100mA
0.40
1 to 50mA
0.20
0.00
–40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
3.075
VOUT vs. Temperature
VIN = 4V
ILOAD = 100µA
CLOAD = 3.3µF
3.025
2.975
2.925
–40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
TC1173-2 2/2/00
5
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| PDF Descargar | [ Datasheet TC1173.PDF ] | |
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