1A Ultra Low Dropout Linear Regulator

TJ3940

Jan. 2011 – Rev.1.0

- 1 -

HTC

SOT-223 3L PKG

TO-252 3L PKG

ORDERING INFORMATION

Device

Package

TJ3940S-X.X

SOT-223 3L

TJ3940GRS-X.X

TO-252 3L

FEATURES

Ultra Low Dropout Voltage

Low Ground Pin Current

Excellent Line and Load Regulation

Guaranteed Output Current of 1A

Available in SOT-223, TO-252 Package

Fixed Output Voltages : 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V

Over-Temperature/Over-Current Protection

-40℃ to 125℃ Junction Temperature Range

Moisture Sensitivity Level 3

APPLICATION

Battery Powered Equipments

Motherboards and Graphic Cards

Microprocessor Power Supplies

Peripheral Cards

High Efficiency Linear Regulators

Battery Chargers

X.X = Output Voltage = 1.2, 1.5, 1.8, 2.5, and 3.3

DESCRIPSION

The TJ3940 series of high performance ultra low-dropout linear regulators operates from 2.5V to 6V input supply

and provides ultra low-dropout voltage, high output current with low ground current. Wide range of preset output

voltage options are available. These ultra low dropout linear regulators respond fast to step changes in load which

makes them suitable for low voltage micro-processor applications. The TJ3940 is developed on a CMOS process

technology which allows low quiescent current operation independent of output load current. This CMOS process

also allows the TJ3940 to operate under extremely low dropout conditions.

Absolute Maximum Ratings

CHARACTERISTIC

SYMBOL

MIN.

MAX.

UNIT

Input Supply Voltage (Survival)

-0.3

6.5

V

Maximum Output Current

-

1.0

A

Lead Temperature (Soldering, 5 sec)

260

℃

Storage Temperature Range

-65

150

℃

Operating Junction Temperature Range

-40

125

℃