TC2014 Datasheet, PDF (1/18 Pages) Microchip Technology – 50 mA, 100 mA, 150 mA CMOS LDOs with Shutdown and Reference Bypass

M ^{TC2014/2015/2185}
50 mA, 100 mA, 150 mA CMOS LDOs with
Shutdown and Reference Bypass
Features
• Low Supply Current: 80 µA (Max)
• Low Dropout Voltage: 140 mV (Typ) @ 150 mA
• High Output Voltage Accuracy: ±0.4% (Typ)
• Standard or Custom Output Voltages
• Power-Saving Shutdown Mode
• Reference Bypass Input for Ultra Low-Noise
Operation
• Fast Shutdown Response Time: 60 µsec (Typ)
• Over-Current Protection
• Space-Saving 5-Pin SOT-23A Package
• Pin Compatible Upgrades for Bipolar Regulators
• Wide Operating Temperature Range:
-40°C to +125°C
Applications
• Battery Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Cellular / GSM / PHS Phones
• Linear Post-Regulator for SMPS
• Pagers
Package Type
5-Pin SOT-23A
V_OUT
Bypass
5
4
TC2014
TC2015
TC2185
1
2
3
V_IN GND SHDN
General Description
The TC2014, TC2015 and TC2185 are high-accuracy
(typically ±0.4%) CMOS upgrades for bipolar low drop-
out regulators, such as the LP2980. Total supply cur-
rent is typically 55 µA; 20 to 60 times lower than in
bipolar regulators.
The key features of the device include low noise oper-
ation (plus bypass reference), low dropout voltage
– typically 45 mV for the TC2014, 90 mV for the
TC2015, and 140 mV for the TC2185, at full load – and
fast response to step changes in load. Supply current
is reduced to 0.5 µA (max) and V_OUT falls to zero when
the shutdown input is low. The devices also incorporate
over-current protection.
The TC2014, TC2015 and TC2185 are stable with an
output capacitor of 1 µF and have a maximum output
current of 50 mA, 100 mA and 150 mA, respectively.
For higher output versions, see the TC1107
(DS21356), TC1108 (DS21357) and TC1173
(DS21362) (I_OUT = 300 mA) datasheets.
Related Literature
• Application Notes: AN765, AN766, AN776 and
AN792
Typical Application
1
V_IN
V_IN
+
1 µF
V_OUT ⁵
V_OUT
+
1 µF
2
TC2014
GND _TC2015
TC2185
3
4
SHDN Bypass
Shutdown Control
(from Power Control Logic)
0.01 µF
Reference
Bypass Cap
(Optional)
 2003 Microchip Technology Inc.
DS21662C-page 1