TC2054 Datasheet, PDF (1/16 Pages) Microchip Technology – 50mA, 100mA, and 150mA CMOS LDOs with Shutdown and Error Output

TC2054/2055/2186
50mA, 100mA, and 150mA CMOS LDOs
with Shutdown and Error Output
Features
• Very Low Supply Current (55µA Typ.) for Longer
Battery Life
• Very Low Dropout Voltage: 140mV (Typ.) @
150mA
• High Output Voltage Accuracy: ±0.4% (Typ)
• Standard or Custom Output Voltages
• Power-Saving Shutdown Mode
• ERROR Output Can Be Used as a Low Battery
Detector or Processor Reset Generator
• Fast Shutdown Reponse Time: 60µsec (Typ)
• Over-Current Protection
• Space-Saving 5-Pin SOT-23A Package
• Pin Compatible Upgrades for Bipolar Regulators
Applications
• Battery Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Cellular / GSMS / PHS Phones
• Pagers
Device Selection Table
Part Number
Package
Junction Temp.
Range
TC2054-xxVCT 5-Pin SOT-23A* -40°C to +125°C
TC2055-xxVCT 5-Pin SOT-23A* -40°C to +125°C
TC2186-xxVCT 5-Pin SOT-23A* -40°C to +125°C
Note: *5-Pin SOT-23A is equivalent to EIAJ (SC-74A).
Package Type
V_OUT
ERROR
5
4
TC2054
TC2055
TC2186
1
2
3
5-Pin SOT-23A*
V_IN GND _{SHDN TOP VIEW}
General Description
The TC2054, TC2055 and TC2186 are high accuracy
(typically ±0.4%) CMOS upgrades for older (bipolar)
low dropout regulators. Designed specifically for bat-
tery-operated systems, the devices’ total supply current
is typically 55µA at full load (20 to 60 times lower than
in bipolar regulators).
The devices’ key features include ultra low noise oper-
ation, very low dropout voltage - typically 45mV
(TC2054); 90mV (TC2055); and 140mV (TC2186) 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 exces-
sive output current). Supply current is reduced to 0.5µA
(max) and both V_OUT and ERROR are disabled when
the shutdown input is low. The devices also incorporate
over-current protection.
The TC2054, TC2055 and TC2186 are stable with a
low esr ceramic output capacitor of 1µF and have a
maximum output current of 50mA, 100mA and 150mA,
respectively. This LDO Family also features a fast
response time (60µsec typically) when released from
shutdown.
Typical Application
V_IN
1 _VIN
1µF
V_OUT ⁵
V_OUT
1µF
2
GND
TC2054
TC2055
1M
TC2186
3
SHDN
Shutdown Control
(from Power Control Logic)
4
ERROR
ERROR
© 2002 Microchip Technology Inc.
DS21663B-page 1