IN

OUT

GND

470 nF

22 µF

6 V to 26 V

5 V to 20 V

ON/OFF

ADJ

R1

R2

LM2941

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LM2941, LM2941C

SNVS770I – JUNE 1999 – REVISED JANUARY 2015

LM2941x 1-A Low Dropout Adjustable Regulator

1 Features

3 Description

The LM2941 positive voltage regulator features the

1

•

ability to source 1 A of output current with a typical

•

Output Voltage Adjustable From 5 V to 20 V

dropout voltage of 0.5 V and a maximum of 1 V over

•

the

entire

temperature

range.

Furthermore,

a

quiescent current reduction circuit has been included

•

Output Current in Excess of 1 A

which reduces the ground pin current when the

•

Trimmed Reference Voltage

differential between the input voltage and the output

•

Reverse Battery Protection

voltage exceeds approximately 3 V. The quiescent

current with 1 A of output current and an input-output

•

Internal Short-Circuit Current Limit

differential of 5 V is therefore only 30 mA. Higher

•

Mirror Image Insertion Protection

quiescent currents only exist when the regulator is in

•

•

TTL, CMOS Compatible ON/OFF Switch

Designed also for vehicular applications, the LM2941

•

WSON Space-Saving Package

and all regulated circuitry are protected from reverse

battery installations or two-battery jumps. During line

2 Applications

transients, such as load dump when the input voltage

can momentarily exceed the specified maximum

•

Industrial

operating voltage, the regulator will automatically shut

•

Automotive

down to protect both the internal circuits and the load.

Familiar regulator features such as short circuit and

thermal overload protection are also provided.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

WSON (8)

4.00 mm x 4.00 mm

TO-263 (5)

10.16 mm x 8.42 mm

LM2941

TO-220 (5)

14.986 mm x 10.16 mm

TO-220 (5)

10.16 mm x 8.51 mm

TO-263 (5)

10.16 mm x 8.42 mm

LM2941C

TO-220 (5)

14.986 mm x 10.16 mm

TO-220 (5)

10.16 mm x 8.51 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Simplified Schematic

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.