L4920 Datasheet, PDF (1/7 Pages) STMicroelectronics – VERY LOWDROP ADJUSTABLE REGULATORS

L4920
®
L4921
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
P entaw att
DESCRIPTION
The L4920 and L4921 are adjustable voltage regu-
lators with a verylow voltage drop (0.4V typ. at 0.4A
T_j = 25°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
input voltage is 5.2V (T_J = 25°C).
Minidip (4 + 4)
ORDERING NUMBERS : L4920 (Pentawatt)
L4921 (Minidip)
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.
BLOCK DIAGRAM
June 2000
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