TC1072-25VCH713 Datasheet, PDF (1/22 Pages) Microchip Technology – 50mA and 100mA CMOS LDOs with Shutdown, ERROR Output and VREF Bypass

TC1072/TC1073
50mA and 100mA CMOS LDOs with Shutdown, ERROR Output and V_REF Bypass
Features:
• 50 µA Ground Current for Longer Battery Life
• Very Low Dropout Voltage
• Choice of 50 mA (TC1072) and 100 mA (TC1073)
Output
• High Output Voltage Accuracy
• Standard or Custom Output Voltages
• Power-Saving Shutdown Mode
• ERROR Output Can Be Used as a Low Battery
Detector or Processor Reset Generator
• Bypass Input for Ultra Quiet Operation
• Overcurrent and Overtemperature Protection
• Space-Saving 6-Pin SOT-23 Package
• Pin Compatible Upgrades for Bipolar Regulators
• Standard Output Voltage Options:
- 1.8V, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 3.0V,
3.3V, 3.6V, 4.0V, 5.0V
• Other output voltages are available. Please
contact Microchip Technology Inc. for details.
Applications:
• Battery Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Cellular/GSM/PHS Phones
• Linear Post-Regulators for SMPS
• Pagers
Typical Application Circuit
R_P
1
6
V_IN
V_IN
V_OUT
V_OUT
+
TC1072
1 µF
TC1073
2 _GND
5
Bypass
C_BYPASS
470 pF
3
SHDN
4
ERROR
ERROR
General Description
The TC1072 and TC1073 are high accuracy (typically
±0.5%) CMOS upgrades for older (bipolar) low dropout
regulators. Designed specifically for battery-operated
systems, the devices’ CMOS construction eliminates
wasted ground current, significantly 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 ultra low noise
operation (plus optional Bypass input); very low
dropout voltage (typically 85 mV, TC1072 and 180 mV,
TC1073 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)
and both V_OUT and ERROR are disabled when the
shutdown input is low. The devices incorporate both
overtemperature and overcurrent protection.
The TC1072 and TC1073 are stable with an output
capacitor of only 1 µF and have a maximum output
current of 50 mA, and 100 mA, respectively. For higher
output current versions, please see the TC1185,
TC1186, TC1187 (I_OUT = 150 mA) and TC1107,
TC1108 and TC1173 (I_OUT = 300 mA) data sheets.
Package Type
6-Pin SOT-23
V_OUT Bypass ERROR
6
5
4
1
2
3
V_IN GND SHDN
Shutdown Control
(from Power Control Logic)
© 2007 Microchip Technology Inc.
DS21354D-page 1