Rev. 10/11/00

AS2940

1A Low Dropout Voltage Regulators

FEATURES

APPLICATIONS

• Output Current 1A

• Battery powered Systems

• Internal Short Circuit Current Limit

• Cordless Telephones

• Dropout Voltage 0.5V at 1A Output

• Automotive Electronics

• Extremely Tight Load and Line Regulation

• Portable / Palm Top / Notebook Computers

• Very Low Temperature Coefficient

• Portable Consumer Equipment

• Mirror Image Insertion protection

• Portable Instrumentation

• Unregulated DC Input Can Withstand -20V Reverse Battery

• SMPS Post-Regulator

• and +60V Positive Transients

• Voltage Reference

• Direct Replacement For LM2940 Socket

PRODUCT DESCRIPTION

The AS2940 is a low powered positive voltage regulator. The AS2940 offers 1A output current with dropout voltage of only 0.5V and

over temperature dropout is up to 1V. The quiescent current is 30mA at differential output of 5V and output current of 1A. The

Other key additional features of this device includes higher output current, positive transient protection up to 60V (load dump), and

ability to survive an unregulated input voltage transient of -20V below ground (reverse battery). The regulator will automatically shut

down to protect both the internal circuits and the load. This device also features short circuit and thermal overload protection.

The AS2940 is offered in a 3-pin TO-220 and TO-263 package compatible with other 5V regulators. This device offers a variety of

output voltages: 3.3V, 5V and 12V. AS2940 is direct replacement to LM2940.

ORDERING INFORMATION

TO-263

3-PIN

TO-220

3-PIN

Oper. Temp.

Range

AS2940T-X

AS2940U-X

-40

°C to +125°C

X= Output Voltage (X = 3.3V, 5.0V)

Consult factory for other fixed voltages.

PIN CONNECTIONS

Top View

TO-263-3 (T)

1

AS2940

2

3

Front View

TO-220-3 (U)

AS2940

12

3

V

V