1

Date: 08/25/04

SPX2941 1A Low Dropout Voltage Regulator

© Copyright 2004 Sipex Corporation

1A Low Dropout Voltage Regulator,

Adjustable Output, Fast Response

SPX2941

DESCRIPTION

FEATURES

■ Adjustable Output Down To 1.25V

■ Low Quiescent Current

■ Guaranteed 1.5A Peak Output Current

■ Low Dropout Voltage of 280mV @ 1A

■ Extremely Tight Load and Line

Regulation

■ Extremely Fast Transient Response

■ Reverse-battery Protection

■ Internal Thermal and Current Limit

Protection

■ Zero Current Shutdown

■ Error Flag Output for Out of Regulation

State

■ Standard TO-220 and TO-263

packages

■ Replacement for LM2941 and AS2941

®

Figure 1. Adjustable Output Linear Regulator

The SPX2941 is a 1A, accurate voltage regulator with a low drop out voltage of 280mV(typ.) at

1A. These regulators are specifically designed for low voltage applications that require a low

dropout voltage and a fast transient response. They are fully fault protected against over-current,

reverse battery, and positive and negative voltage transients. Other features include Enable, and

Error Flag. The SPX2941 is offered in 5-pin TO-220 & TO-263 packages. For a 3A version, refer

to the SPX29300 data sheet.

SPX2941

V

OUT

V

IN

GND

ADJ

4

2

3

5

1

R1

R2

10µF

6.8µF

+

+

EN

TYPICAL APPLICATIONS CIRCUIT

Now Available in Lead Free Packaging

12 3 4 5

SPX2941

5 Pin TO-263

APPLICATIONS

■ Powering VGA & Sound Card

■ LCD Monitors

■ USB Power Supply

■ Power PC Supplies

■ SMPS Post-Regulator

■ High Efficiency Linear Power Supplies

■ Battery Charger

■ Portable Instrumentation

■ Constant Current Regulators

■ Adjustable Power Supplies