LM2931Z-5.0+ National Semiconductor, LM2931Z-5.0+ Datasheet

LM2931Z-5.0+

Manufacturer Part Number

LM2931Z-5.0+

Description

Manufacturer

National Semiconductor

Datasheet

1.LM2931AM50.pdf (18 pages)

Specifications of LM2931Z-5.0+

Notes

NEW

Date_code

10+

Current page: 1 of 18
Download datasheet (413Kb)

LM2931

Series Low Dropout Regulators

General Description

The LM2931 positive voltage regulator features a very low

quiescent current of 1mA or less when supplying 10mA loads.

This unique characteristic and the extremely low input-output

differential required for proper regulation (0.2V for output cur-

rents of 10mA) make the LM2931 the ideal regulator for

standby power systems. Applications include memory stand-

by circuits, CMOS and other low power processor power

supplies as well as systems demanding as much as 100mA

of output current.

Designed originally for automotive applications, the LM2931

and all regulated circuitry are protected from reverse battery

installations or 2 battery jumps. During line transients, such

as a load dump (60V) when the input voltage to the regulator

can momentarily exceed the specified maximum operating

voltage, the regulator will automatically shut down to protect

both internal circuits and the load. The LM2931 cannot be

harmed by temporary mirror-image insertion. Familiar regu-

lator features such as short circuit and thermal overload pro-

tection are also provided.

The LM2931 family includes a fixed 5V output (±3.8% toler-

ance for A grade) or an adjustable output with ON/OFF pin.

Connection Diagrams

FIXED VOLTAGE OUTPUT

*NC = Not internally connected. Must be electrically isolated from the rest of

the circuit for the micro SMD package.

TO-220 3-Lead Power Package

8-Pin Surface Mount

Front View

Top View

525407

5254

525406

Both versions are available in a TO-220 power package,

TO-263 surface mount package, and an 8-lead surface mount

package. The fixed output version is also available in the

TO-92 plastic and 6-Bump micro SMD packages.

Features

■

Very low quiescent current

Output current in excess of 100 mA

Input-output differential less than 0.6V

Reverse battery protection

60V load dump protection

−50V reverse transient protection

Short circuit protection

Internal thermal overload protection

Mirror-image insertion protection

Available in TO-220, TO-92, TO-263, SO-8 or 6-Bump mi-

cro SMD packages

Available as adjustable with TTL compatible switch

See AN-1112 for micro SMD considerations

TO-263 Surface-Mount Package

TO-92 Plastic Package

Bottom View

Side View

Top View

525412

525408

525411

www.national.com

June 2005

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