Obsolete Device
TC55
1 µA Low Dropout Positive Voltage Regulator
Features
General Description
• Low Dropout Voltage: 120 mV (typ) at 100 mA,
380 mV (typ) at 200 mA
The TC55 Series is a collection of CMOS low dropout,
positive voltage regulators that can source up to
250 mA of current, with an extremely low input-output
voltage differential of 380 mV (typ) at 200 mA.
• High Output Current: 250 mA (VOUT = 5.0V)
• High Accuracy Output Voltage: ±2% (max)
(±1% Semi-Custom Version)
The TC55’s low dropout voltage, combined with the low
current consumption of only 1.1 µA (typ), makes it ideal
for battery operation. The low voltage differential (drop-
out voltage) extends the battery operating lifetime. It
also permits high currents in small packages when
operated with minimum VIN – VOUT differentials.
• Low Power Consumption: 1.1 µA (typ)
• Low Temperature Drift: ±100 ppm/°C (typ)
• Excellent Line Regulation: 0.2%/V (typ)
• Package Options: 3-Pin SOT-23A, 3-Pin SOT-89
and 3-Pin TO-92
The circuit also incorporates short-circuit protection to
ensure maximum reliability.
• Short-Circuit Protection
• Standard Output Voltage Options: 1.2V, 1.8V,
2.5V, 3.0V, 3.3V, 5.0V
Functional Block Diagram
VIN
VOUT
Applications
• Battery-Powered Devices
• Cameras and Portable Video Equipment
• Pagers and Cellular Phones
• Solar Powered Instruments
• Consumer Products
Short-Circuit
Protection
+
–
Voltage
Reference
Package Types
3-Pin SOT-23A
3-Pin SOT-89
VIN
3
VIN
GND
TC55
TC55
1
2
1
2
3
GND
VOUT
GND VIN VOUT
3-Pin TO-92
1 2 3
Bottom
View
GND VIN VOUT
Note: 3-Pin SOT-23A is equivalent to the
EIAJ SC-59.
© 2005 Microchip Technology Inc.
DS21435F-page 1