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  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1054 Datasheet

CMOS LDOs

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TC1054 pdf
TC1054/TC1055/TC1186
50 mA, 100 mA and 150 mA CMOS LDOs with Shutdown and ERROR Output
Features
• Low Ground Current for Longer Battery Life
• Low Dropout Voltage
• Choice of 50 mA (TC1054), 100 mA (TC1055)
and 150 mA (TC1186) Output
• High Output Voltage Accuracy
• Standard or Custom Output Voltages:
- 1.8V, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 3.0V,
3.3V, 3.6V, 4.0V, 5.0V
• Power-Saving Shutdown Mode
• ERROR Output Can Be Used as a Low-Battery
Detector or Microcontroller-Reset Generator
• Overcurrent and Overtemperature Protection
• 5-Pin SOT-23 Package
• Pin-Compatible Upgrades for Bipolar Regulators
Applications
• Battery Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Cellular/GSM/PHS Phones
• Linear Post-Regulators for SMPS
• Pagers
Typical Application
VIN 1 VIN
VOUT 5
VOUT
TC1054
TC1055
+1 µF
2 TC1186
GND
1 M
3
SHDN
ERROR 4
ERROR
Shutdown Control
(from Power Control Logic)
General Description
The TC1054, TC1055 and TC1186 are high accuracy
(typically ±0.5%) CMOS upgrades for older (bipolar)
low dropout regulators. Designed specifically for
battery-operated systems, the devices’ CMOS
construction minimizes ground current, extending
battery life. Total supply current is typically 50 µA at full
load (20 to 60 times lower than in bipolar regulators).
The devices’ key features include low noise operation,
low dropout voltage – typically 85 mV (TC1054),
180 mV (TC1055) and 270 mV (TC1186) at full load —
and fast response to step changes in load. An error
output (ERROR) is asserted when the devices are
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 0.5 µA (maximum), with both
VOUT and ERROR disabled when the shutdown input is
low. The devices incorporate both overtemperature
and over-current protection.
The TC1054, TC1055 and TC1186 are stable with an
output capacitor of only 1 µF, and have a maximum
output current of 50 mA, 100 mA and 150 mA,
respectively. For higher output current regulators,
please refer to the TC1173 (IOUT = 300 mA) data sheet
(DS21632).
Package Type
5-Pin SOT-23
VOUT
ERROR
54
TC1054
TC1055
TC1186
123
VIN GND SHDN
Note: 5-Pin SOT-23 is equivalent to the EIAJ (SC-74A)
2002-2012 Microchip Technology Inc.
DS21350E-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1054 Datasheet

CMOS LDOs

No Preview Available !

TC1054 pdf
TC1054/TC1055/TC1186
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
Input Voltage ..................................................................6.75V
Output Voltage ..................................... (-0.3V) to (VIN + 0.3V)
Power Dissipation ......................... Internally Limited (Note 6)
Maximum Voltage on Any Pin ...................VIN +0.3V to -0.3V
Operating Junction Temperature Range .. -40°C <TJ< +125°C
Storage Temperature.....................................-65°C to +150°C
† Notice: Stresses above those listed under "Absolute
Maximum Ratings" may cause permanent damage to
the device. These are stress ratings only and functional
operation of the device at these or any other conditions
above those indicated in the operation sections of the
specifications is not implied. Exposure to Absolute
Maximum Rating conditions for extended periods may
affect device reliability.
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise noted, VIN = VOUT + 1V, IL = 100 µA, CL = 3.3 µF, SHDN > VIH, TA = +25°C. Boldface
type specifications apply for junction temperatures of -40°C to +125°C.
Parameters
Sym
Min Typ Max Units
Conditions
Input Operating Voltage
Maximum Output Current
VIN 2.7 6.50 V Note 8
IOUTMAX
50
— mA TC1054
100
TC1055
150
TC1186
Output Voltage
VOUT Temperature
Coefficient
VOUT
TCVOUT
VR – 2.5%
VR ±0.5%
20
40
VR + 2.5%
V Note 1
ppm/°C Note 2
Line Regulation
VOUT/VIN
0.05
0.35
% (VR + 1V) VIN6V
Load Regulation
TC1054; TC1055 VOUT/VOUT
TC1186
0.5
0.5
2 % (Note 3)
3 IL = 0.1 mA to IOUTMAX
Note 1: VR is the regulator output voltage setting. For example: VR = 1.8V, 2.5V, 2.7V, 2.85V, 3.0V, 3.3V, 3.6V,
4.0V, 5.0V.
2: TC VOUT = (VOUTMAX – VOUTMIN)x 106
VOUT x T
3: Regulation is measured at a constant junction temperature using low-duty-cycle pulse testing. Load regu-
lation is tested over a load range from 0.1 mA 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.
5: Thermal Regulation is defined as the change in output voltage at a time T after a change in power dissipa-
tion is applied, excluding load or line regulation effects. Specifications are for a current pulse equal to ILMAX
at VIN = 6V for T = 10 ms.
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, JA). Exceeding the
maximum allowable power dissipation causes the device to initiate thermal shutdown. See Section 5.0
“Thermal Considerations” for more details.
7: Hysteresis voltage is referenced by VR.
8: The minimum VIN has to justify the conditions: VIN VR + VDROPOUT and VIN 2.7V for IL = 0.1 mA to
IOUTMAX.
9: Apply for junction temperatures of -40°C to +85°C.
DS21350E-page 2
2002-2012 Microchip Technology Inc.


Part Number TC1054
Description CMOS LDOs
Maker Microchip Technology
Total Page 20 Pages
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