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TC1173 Datasheet

300mA CMOS LDO with Shutdown ERROR Output and Bypass

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TC1173 pdf
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.



TelCom
TelCom

TC1173 Datasheet Preview

TC1173 Datasheet

300mA CMOS LDO with Shutdown ERROR Output and Bypass

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TC1173 pdf
300mA CMOS LDO With Shutdown,
ERROR Output, And Bypass
TC1173
ABSOLUTE MAXIMUM RATINGS*
Input Voltage .............................................................. 6.5V
Output Voltage ........................... (VSS – 0.3) to (VIN + 0.3)
Power Dissipation .................... Internally Limited (Note 7)
Operating Temperature .................... – 40°C < TJ < 125°C
Storage Temperature ............................ – 65°C to +150°C
Maximum Voltage on Any Pin ............ VIN +0.3V to – 0.3V
Lead Temperature (Soldering, 10 Sec.) ................ +300°C
*Absolute Maximum Ratings indicate device operation limits beyond dam-
age may occur. Device operation beyond the limits listed in Electrical
Characteristics is not recommended.
ELECTRICAL CHARACTERISTICS: VIN = VOUT + 1V, IL = 0.1µA, CL = 3.3µF, SHDN > VIH, TA = 25°C, unless otherwise noted.
BOLDFACE type specifications apply for junction temperatures of – 40°C to +125°C
Symbol
Parameter
Test Conditions
Min Typ Max Units
VIN
IOUTMAX
VOUT
VOUT/T
VOUT/VIN
VOUT/VOUT
VIN – VOUT
ISS1
ISS2
PSRR
IOUTSC
VOUTPD
eN
Input Operating Voltage
Maximum Output Current
Output Voltage
VOUT Temperature Coefficient
Line Regulation
Load Regulation
Dropout Voltage (Note 4)
Supply Current
Shutdown Supply Current
Power Supply Rejection Ratio
Output Short Circuit Current
Thermal Regulation
Output Noise
Note 1
Note 2
300
VR - 2.5%
(VR + 1V) < VIN < 6V
IL = 0.1mA to IOUTMAX (Note 3)
IL = 0.1mA
IL = 100mA
IL = 300mA
SHDN = VIH
SHDN = 0V
FRE 1kHz
VOUT = 0V
Note 5
F = 1kHz, COUT = 1µF,
RLOAD = 50
6.0
——
VR ± 0.5%
VR + 2.5%
——
40
0.05 0.35
0.5 2.0
20 30
80 160
240 480
50 90
0.05 0.5
60 —
550 650
0.04 —
260 —
V
mA
V
ppm/°C
%
%
mV
µA
µA
dB
mA
V/W
nV/Hz
SHDN Input
VIH SHDN Input High Threshold
VIL SHDN Input Low Threshold
45 — — %VIN
— — 15 %VIN
ERROR Output
VMIN
Minimum Operating Voltage
1.0 — — V
VOL
Output Logic Low Voltage
1mA Flows to ERROR
— — 400 mV
VTH ERROR Threshold Voltage
0.95 x VR
V
VOL ERROR Positive Hysteresis Note 7
— 50 — mV
NOTES: 1. VR is the user-programmed regulator output voltage setting.
2. TC VOUT = (VOUTMAX VOUTMIN) x 10 6
VOUT x T
3. Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested over a load range from 0.1mA
to the maximum specified output current. Changes in output voltage due to heating effects are covered by the thermal regulation specification.
4. Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at a 1V differential.
5. Thermal Regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load
or line regulation effects. Specifications are for a current pulse equal to ILMAX at VIN = 6V for T = 10msec.
6. The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature, and the
thermal resistance from junction-to-air (i.e. TA, TJ, θJA). Exceeding the maximum allowable power dissipation causes the device to initiate
thermal shutdown. Please see Thermal Considerations section of this data sheet for more details.
7. Hysteresis voltage is referenced to VR.
TC1173-2 2/2/00
2


Part Number TC1173
Description 300mA CMOS LDO with Shutdown ERROR Output and Bypass
Maker TelCom
Total Page 7 Pages
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