lm2941wg-883 National Semiconductor Corporation, lm2941wg-883 Datasheet

lm2941wg-883

Manufacturer Part Number

lm2941wg-883

Description

1a Low Dropout Adjustable Regulator

Manufacturer

National Semiconductor Corporation

Datasheet

1.LM2941WG-883.pdf (12 pages)

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1A Low Dropout Adjustable Regulator

General Description

The LM2941 positive voltage regulator features the ability to

source 1A of output current with a typical dropout voltage of

0.5V and a maximum of 1V over the entire temperature range.

Furthermore, a quiescent current reduction circuit has been

included which reduces the ground pin current when the dif-

ferential between the input voltage and the output voltage

exceeds approximately 3V. The quiescent current with 1A of

output current and an input-output differential of 5V is there-

fore only 30mA. Higher quiescent currents only exist when the

regulator is in the dropout mode (V

Originally designed for vehicular applications, the LM2941

and all regulated circuitry are protected from reverse battery

installations or two-battery jumps. During line transients, such

as load dump when the input voltage can momentarily exceed

the specified maximum operating voltage, the regulator will

automatically shut down to protect both the internal circuits

Ordering Information

Note 1: FOR ADDITIONAL DIE INFORMATION, PLEASE VISIT THE HI REL WEB SITE AT: www.national.com/analog/space/level_die

Connection Diagrams

LM2941WG/883

LM2941WG-QMLV

LM2941WGRLQMLV

ELDRS FREE

LM2941 MDE

ELDRS FREE

NS Part Number

(Note 10)

− V

5962R9166702VYA

5962R9166702V9A

5962-9166701QYA

SMD Part Number

5962-9166701VYA

16-Lead Ceramic Surface Mount Package

100 krad(Si)

201585

≤

3V).

See NS Package Number WG16A

LM2941QML

Top View

and the load. Familiar regulator features such as short circuit

and thermal overload protection are also provided.

Features

■

NS Package Number

Available with radiation guarantee

— ELDRS Free

Output voltage adjustable from 5V to 20V

Dropout voltage typically 0.5V @ I

Output current in excess of 1A

Trimmed reference voltage

Reverse battery protection

Internal short circuit current limit

Mirror image insertion protection

TTL, CMOS compatible ON/OFF switch

(Note 1)

WG16A

20158532

16LD Ceramic SOIC

Bare Die

Package Description

= 1A

August 25, 2009

www.national.com

100 krad(Si)

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lm2941wg-883 Summary of contents

Page 1

... Ordering Information NS Part Number LM2941WG/883 LM2941WG-QMLV LM2941WGRLQMLV (Note 10) ELDRS FREE LM2941 MDE ELDRS FREE (Note 10) Note 1: FOR ADDITIONAL DIE INFORMATION, PLEASE VISIT THE HI REL WEB SITE AT: www.national.com/analog/space/level_die Connection Diagrams © ...

Page 2

Equivalent Schematic Diagram www.national.com 2 20158501 ...

Page 3

Absolute Maximum Ratings ≤ Input Voltage (Survival Voltage, 100ms) Internal Power Dissipation (Note 3) Maximum Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10 seconds) Thermal Resistance θ JA Ceramic SOIC (Still Air) Ceramic SOIC (500LF/Min Air Flow) θ JC ...

Page 4

LM2941 Electrical Characteristics DC Parameters The following conditions apply, unless otherwise specified. ≤ ≤ DC 20V +5V Symbol Parameter V Reference Voltage Ref V Line Regulation RLine V Load Regulation RLoad ...

Page 5

DC Drift Parameters The following conditions apply, unless otherwise specified. ≤ ≤ DC 20V +5V Delta calculations performed on QMLV devices at group B , subgroup 5. Symbol Parameter V Reference ...

Page 6

Typical Performance Characteristics Dropout Voltage Output Voltage Quiescent Current www.national.com Dropout Voltage vs. Temperature 20158511 Quiescent Current vs. Temperature 20158513 Quiescent Current 20158515 6 20158512 20158514 20158516 ...

Page 7

Line Transient Response 20158517 Ripple Rejection 20158519 Low Voltage Behavior 20158521 Load Transient Response Output Impedance Low Voltage Behavior 7 20158518 20158520 20158522 www.national.com ...

Page 8

Output Capacitor ESR Output at Voltage Extremes www.national.com Output at Voltage Extremes 20158523 Peak Output Current 20158525 8 20158524 20158526 ...

Page 9

Typical Applications Note: Using 1KΩ for R1 will ensure that the input bias current error of the adjust pin will be negligible. Do not bypass R1 or R2. This will lead to instabilities. * Required if regulator is located far ...

Page 10

Revision History Section Released Revision 08/25/09 A New Release, Corporate format www.national.com Section 1 MDS data sheet converted into one Corp. data sheet format. Added Radiation products to ordering table. MNLM2941-X Rev 4A1 will be archived. 10 Changes ...

Page 11

Physical Dimensions inches (millimeters) unless otherwise noted 16LD Ceramic SOIC NS Package Number WG16A 11 www.national.com ...

Page 12

... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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