TC2054_06 Datasheet, PDF (1/18 Pages) Microchip Technology – 50 mA, 100 mA, and 150 mA CMOS LDOs with Shutdown and Error Output

TC2054/2055/2186
50 mA, 100 mA, and 150 mA CMOS LDOs
with Shutdown and Error Output
Features
• Low Supply Current (55 µA Typ.) for Longer Bat-
tery Life
• Low Dropout Voltage: 140 mV (Typ.) @ 150 mA
• 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: 60 μsec (Typ)
• Overcurrent and Overtemperature Protection
• Space-Saving 5-Pin SOT-23A 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, 5.0V
Applications
• Battery Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Cellular / GSMS / PHS Phones
• Pagers
Typical Application
V_IN
1 _VIN
1 µF
V_OUT ⁵
V_OUT
1 µF
2 _{GND TC2054}
TC2055
1M
TC2186
3
SHDN
Shutdown Control
(from Power Control Logic)
4
ERROR
ERROR
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 55 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 45 mV (TC2054); 90 mV
(TC2055); and 140 mV (TC2186) at full load - and fast
response to step changes in load. An error output
(ERROR) is asserted when the devices are out-of-reg-
ulation (due to a low input voltage or excessive output
current). Supply current is reduced to 0.5 µA (max) and
both V_OUT and ERROR are disabled when the shut-
down input is low. The devices also incorporate over-
current and overtemperature protection.
The TC2054, TC2055 and TC2186 are stable with a
low esr ceramic output capacitor of 1 µF and have a
maximum output current of 50 mA, 100 mA and
150 mA, respectively. This LDO Family also features a
fast response time (60 µs typically) when released from
shutdown.
Package Type
V_OUT
5
ERROR
4
TC2054
TC2055
TC2186
1
2
3
5-Pin SOT-23A
V_IN GND SHDN
Top View
© 2006 Microchip Technology Inc.
DS21663C-page 1