TC1054_07 Datasheet, PDF (1/18 Pages) Microchip Technology – 50 mA, 100 mA and 150 mA CMOS LDOs with Shutdown and ERROR Output

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
1
V_IN
V_IN
V_OUT ⁵
V_OUT
TC1054
TC1055
2
TC1186
GND
+
1 µF
1 MΩ
3
4
SHDN ERROR
ERROR
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 (max), with both V_OUT and ERROR
disabled when the shutdown input is low. The devices
incorporate both over-temperature 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 (I_OUT = 300 mA) data sheet
(DS21632).
Package Type
5-Pin SOT-23
V_OUT
ERROR
5
4
TC1054
TC1055
TC1186
1
2
3
V_IN GND SHDN
NOTE: 5-Pin SOT-23 is equivalent to the EIAJ (SC-74A)
Shutdown Control
(from Power Control Logic)
© 2007 Microchip Technology Inc.
DS21350D-page 1