TC1224-50VCTTR Datasheet, PDF (1/14 Pages) Microchip Technology – 50mA and 100mA CMOS LDOs with Shutdown

TC1223/TC1224
50mA and 100mA CMOS LDOs with Shutdown
Features
• Extremely Low Ground Current for Longer Battery
Life
• Very Low Dropout Voltage
• Choice of 50mA and 100mA Output (TC1223,
TC1224, Respectively)
• High Output Voltage Accuracy
• Standard or Custom Output Voltages
• Power Saving Shutdown Mode
• Over Current and Over Temperature Protection
• Space-Saving 5-Pin SOT-23A 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
Device Selection Table
Part Number
Package
Junction
Temp. Range
TC1223-xxVCT 5-Pin SOT-23A -40°C to +125°C
TC1224-xxVCT 5-Pin SOT-23A -40°C to +125°C
NOTE: xx indicates output voltages
Available Output Voltages: 2.5, 2.7, 2.8, 2.85, 3.0, 3.3, 3.6,
4.0, 5.0.
Other output voltages are available. Please contact Microchip
Technology Inc. for details.
Package Type
5-Pin SOT-23A
V_OUT
NC
5
4
TC1223
TC1224
1
2
3
V_IN GND SHDN
NOTE: 5-Pin SOT-23A is equivalent to the EIAJ (SC-74A)
© 2002 Microchip Technology Inc.
General Description
The TC1223 and TC1224 are high accuracy (typically
±0.5%) CMOS upgrades for older (bipolar) low dropout
regulators such as the LP2980. Designed specifically
for battery-operated systems, the devices’ CMOS
construction eliminates wasted ground current,
significantly extending battery life. Total supply current
is typically 50µA at full load (20 to 60 times lower than
in bipolar regulators).
The devices’ key features include ultra low noise
operation; very low dropout voltage (typically 85mV,
TC1223 and 180mV, TC1224 at full load) and fast
response to step changes in load. Supply current is
reduced to 0.5µA (max) and V_OUT falls to zero when
the shutdown input is low. The devices incorporate both
over temperature and over current protection.
The TC1223 and TC1224 are stable with an output
capacitor of only 1µF and have a maximum output
current of 50mA and 100mA respectively. For higher
output current versions, please see the TC1107,
TC1108 and TC1173 (I_OUT = 300mA) data sheets.
Typical Application
1
V_IN
V_IN
5
V_OUT
V_OUT
TC1223
TC1224
+
1µF
2 _GND
3
SHDN
4
NC
Shutdown Control
(from Power Control Logic)
DS21368B-page 1