L4989 Datasheet, PDF (1/10 Pages) STMicroelectronics – LOW POWER VOLTAGE REGULATOR

L4989
LOW POWER VOLTAGE REGULATOR
PRODUCT PREVIEW
■ OPERATING DC SUPPLY VOLTAGE RANGE
5.6V TO 31V
■ VERY LOW QUIESCENT CURRENT WITH
WATCHDOG DISABLED
■ PRECISION OUTPUT VOLTAGE (3%)
■ LOW-DROP VOLTAGE
(180mV typ at I_o = 150mA)
■ RESET CIRCUIT SENSING THE OUTPUT
VOLTAGE DOWN TO 1V
■ PROGRAMMABLE RESET DELAY WITH
EXTERNAL CAPACITOR
■ WATCHDOG DISABLE INPUT
■ PROGRAMMABLE WATCHDOG TIMER WITH
EXTERNAL CAPACITOR
■ THERMAL SHUTDOWN AND SHORT
CIRCUIT PROTECTION
■ WIDE TEMPERATURE RANGE (T_j = -40°C TO
150°C)
SO8
SO20
ORDERING NUMBERS: L4989D (SO8)
L4989 (SO20)
BLOCK DIAGRAMt
Vs
Vi
Wi
Vcw
Ctw _WE
Vcr
Ctr
Start up
Voltage
Reference
1.25V
100mV ^+_
watchdog
Reset
Vo
Co
gnd
Res
March 2004
This is preliminary information on a new product now in development. Details are subject to change without notice.
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