L4920

L4921

June 2000

VERY LOW DROP ADJUSTABLE REGULATORS

®

.

VERY LOW DROP VOLTAGE

.

ADJUSTABLE OUTPUT VOLTAGE FROM

1.25V TO 20V

.

400mA OUTPUT CURRENT

.

LOW QUIESCENT CURRENT

.

REVERSE VOLTAGE PROTECTION

.

+ 60/

− 60V TRANSIENT PEAK VOLTAGE

PROTECTION

.

SHORT CIRCUIT PROTECTION WITH FOLD-

BACK CHARACTERISTICS

.

THERMAL SHUT-DOWN

DESCRIPTION

Pentaw att

ORDERING NUMBERS : L4920 (Pentawatt)

L4921 (Minidip)

BLOCK DIAGRAM

The L4920 and L4921 are adjustable voltage regu-

lators with a verylow voltage drop (0.4V typ. at 0.4A

°C), low quiescent current and comprehen-

sive on-chip protection.

Thesedevices are protectedagainst load dump and

field decay transients, polarity reversal and over

heating.

A foldbackcurrent limiter protectsagainstload short

circuits.

The outputvoltage is adjustablethrough an external

divider from 1.25V to 20V. The minimum operating

°C).

Minidip (4 + 4)

These regulators are designed for automotive, in-

dustrial and consumer applications where low con-

sumption is particularly important.

In battery backup and standby applications the low

consumption of these devices extends battery life.

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