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L4920 Datasheet

  • L4920

  • VERY LOWDROP ADJUSTABLE REGULATORS

  • 7頁(yè)

  • STMICROELECTRONICS   STMICROELECTRONICS

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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/
鈭?/div>
60V TRANSIENT PEAK VOLTAGE
PROTECTION
SHORT CIRCUIT PROTECTION WITH FOLD-
BACK CHARACTERISTICS
THERMAL SHUT-DOWN
Pentaw 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擄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擄C).
BLOCK DIAGRAM
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.
June 2000
1/7

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