www.baylinear.com

1.25A High Current Low Dropout

LM2940/2941

Voltage Regulator Adjustable

Pin Connection

Ordering Information

Devices

Package

Temp.

LM2940T

TO-220-3

-40

°C to 125 °C

LM2941T

TO-220-5

-40

°C to 125 °C

LM2940S

TO-263-3

-40

°C to 125 °C

LM2941S

TO-263-5

-40

°C to 125 °C

LM2940N

SOT-223-3

-40

°C to 125 °C

LM2941N

SOT-223-5

-40

°C to 125 °C

LM2940J

LPDD-3

-40

°C to 125 °C

LM2941J

LPDD-5

-40

°C to 125 °C

Description

The Bay Linear LM2940 & LM2941 is a 1.25A high accuracy, low

dropout voltage regulator with only 40mV at light loads and

350mV(Typ.)@ 1.0A) and low quiescent current of 240

µA typical.

The LM2940/41 is designed for low voltage a application that

requires lower dropout voltage and faster transient response. This

device is an excellent choice for use in powering low voltage

applications where require a lower dropout, faster transient response

to regulate from +2.5V to 3.8V supplies and as a post regulator for

switching supplies applications.

The LM2940/41 offers full protection against over-current faults,

reversed input polarity, reversed load insertion, and positive and

negative transient voltage. On-Chip trimming adjusts the reference

voltage to 1%. The LM2940-xx devices are in 3 pin fixed voltage

regulators. The LM2941 include an Enable pin

in the 5 pin

packages

.

The LM2940/41 are offered in a 3 & 5-pin SOT-223, TO-220 &

TO-263 package compatible with other 3 terminal regulators. The

LM2940/41 is also offer in a new LPDD (Low Profile TO-263)

package from 4.47 mm (DD) tickness down to only 1.27 mm

(LPDD) t t l ti k

Features

•

High output accuracy of 1%

•

Output Adjustable from 1.24V to 26V

•

Output Current of 1.25A

•

Low Dropout Voltage

•

Low quiescent current

•

Extremely Tight Load & Line Regulation

•

Reverse-battery and “Load Dump” Protection

•

Zero Current Shutdown Mode (5-pin version)

•

Offer in TO-263, TO-220, SOT-223, & New Slim

LPDD

Applications

•

Powering VGA & Sound Card

•

LCD Monitor

•

Battery Powered Equipments/Laptop & Notebook

•

SMPS Post Regulator / DC to DC Modules

•

High Efficiency Linear Power Supply

•

Adjustable Power Supply

•

Bar Code Scanners

Bay Linear

Inspire the Linear Power

TO-263-3 Package

V

OUT

GND

V

IN

BAY

B2940

Front View

12

3

Front View

TO-220-3 Package

BAY

B2940

V

IN

V

OUT

GND

TO-263-5 Package

Top View

45

BAY

B2941

3

2

1

GND

OUPUT

1)

3)

4)

5)

2) ON/OFF

ADJUST

INPUT

TO-220-5 Package

Top View

BAY

B2941

12 3 4 5

TO-263-3 Package

V

OUT

GND

V

IN

BAY

B2940

Front View

12

3

Front View

TO-220-3 Package

BAY

B2940

V

IN

V

OUT

GND

TO-263-3 Package

V

OUT

GND

V

IN

BAY

B2940

Front View

12

3

Front View

TO-220-3 Package

BAY

B2940

V

IN

V

OUT

GND

Front View

TO-220-3 Package

BAY

B2940

V

IN

V

OUT

GND

TO-263-5 Package

Top View

45

BAY

B2941

3

2

1

GND

OUPUT

1)

3)

4)

5)

2) ON/OFF

ADJUST

INPUT

TO-220-5 Package

Top View

BAY

B2941

12 3 4 5

TO-263-5 Package

Top View

45

BAY

B2941

3

2

1

GND

OUPUT

1)

3)

4)

5)

2) ON/OFF

ADJUST

INPUT

GND

OUPUT

1)

3)

4)

5)

2) ON/OFF

ADJUST

INPUT

TO-220-5 Package

Top View

BAY

B2941

12 3 4 5

TO-220-5 Package

Top View

BAY

B2941

12 3 4 5