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廬

LM2931

SERIES

VERY LOW DROP VOLTAGE

REGULATOR WITH INHIBIT FUNCTION

s

s

s

s

s

s

s

s

s

VERY LOW DROPOUT VOLTAGE (0.15V

TYP. AT 10mA LOAD)

LOW QUIESCENT CURRENT (TYP 2.5mA,

AT 100mA LOAD)

OUTPUT CURRENT UP TO 100mA

ADJUSTABLE (FROM V

OUT

=2.5V ONLY

SO-8) AND FIXED (3.3V & 5V) OUTPUT

VOLTAGE VERSION

INTERNAL CURRENT AND THERMAL LIMIT

LOAD DUMP PROTECTION UP TO 60V

REVERSE TRANSIENT PROTECTION UP TO

-50V

TEMPERATURE RANGE: -40 TO 125

o

C

PACKAGE AVAILABLE: TO-92, DPAK,

TO-220, SO-8 (WITH INHIBIT CONTROL)

SO-8

TO-92

TO-252 (DPAK)

TO-220

DESCRIPTION

The LM2931 series are very low drop

regulators. The very low drop voltage and the

low quiescent current make them particular

suitable for low noise, low power applications

and in battery powered systems. In the 8 pin

configation (SO-8), fully compatible to the older

L78L0 0 family, a shut down Logic Control

function is available.

This means that when the device is used as a

BLOCK DIAGRAM

local regulator is possible to put a part of the

board in stand-by decreasing the total power

consumption. Ideal for automotive application

the LM2931 is proteceted from reverse battery

installations or 2 battery jumps. During the

transient, suchs as a a load dump (60V) when

the input voltage can exceed the specified

maximum operating input voltage (26V), the

regulator will automatically shut down to protect

both internal circuit and the load.

December 1999

1/16

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