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L4989 数据表(PDF) 1 Page - STMicroelectronics

部件名 L4989
功能描述  LOW POWER VOLTAGE REGULATOR
PDF  10 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L4989 数据表(HTML) 1 Page - STMicroelectronics

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L4989
March 2004
This is preliminary information on a new product now in development. Details are subject to change without notice.
■ 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 Io = 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 (Tj = -40°C TO
150°C)
ORDERING NUMBERS: L4989D (SO8)
L4989 (SO20)
SO20
SO8
PRODUCT PREVIEW
LOW POWER VOLTAGE REGULATOR
BLOCK DIAGRAMt
watchdog
Vs
Vi
Wi
Vcw
Vcr
Ctr
Ctw
Res
WE
gnd
Vo
Co
Voltage
Reference
Reset
Start up
100mV
+
_
1.25V
watchdog
Vs
Vi
Wi
Vcw
Vcr
Ctr
Ctw
Res
WE
gnd
Vo
Co
Voltage
Reference
Reset
Start up
100mV
+
_
1.25V


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