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FEATURES
OPERATING DC SUPPLY VOLTAGE RANGE
5.6V TO 31V
LOW QUIESCENT CURRENT
(6碌A(chǔ) Typ. @ 25擄C with Enable Low)
HIGH PRECISION OUTPUT VOLTAGE (2%)
LOW DROPOUT VOLTAGE LESS THAN 0.5V
RESET CIRCUIT SENSING THE OUTPUT
VOLTAGE DOWN TO 1V
PROGRAMMABLE RESET PULSE DELAY
WITH EXTERNAL CAPACITOR
WATCHDOG
PROGRAMMABLE WATCHDOG TIMER WITH
EXTERNAL CAPACITOR
THERMAL SHUTDOWN AND SHORT
CIRCUIT PROTECTION
AUTOMOTIVE TEMPERATURE RANGE
(Tj = -40擄C TO 150擄C)
ENABLE INPUT FOR ENABLING/DISABLING
THE VOLTAGE REGULATOR OUTPUT
Figure 1. Packages
SO-8
SO-20
Table 1. Order Codes
Part Number
L4979D
L4979MD
L4979D13TR
L4979MD13TR
Package
SO-8
SO-20
SO-8 Tape & Reel
SO-20 Tape & Reel
Figure 2. Block Diagram
5V, 150 mA
Vi
Vs
Vo
Co
Vcw
Ctw
watchdog
Wi
Voltage reference
gnd
En
Res
Vcr
Ctr
reset
October 2004
Rev. 5
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