SGS Thomson Microelectronics L4923 Datasheet
5V–1A VERY LOW DROPREGULATOR
.
VERY LOW DROP (max. 0.9V at 1A) OVER
FULL OPERATING TEMPERATURE RANGE
(– 40/ + 125 °C)
.LOW QUIESCENT CURRENT (max 70 mA at
1 A) OVERFULLTRANGE
.
PRECISEOUTPUTVOLTAGE(5V±4%)OVER
FULLT RANGE
.
POWER ON-OFF INFORMATION WITH SETTABLEDELAY
.
INHIBIT FOR REMOTE ON-OFF COMMAND
(activehigh)
.LOADSTANDBYCURRENT
.LOAD DUMPAND REVERSEBATTERYPRO-
TECTION
.
SHORTCIRCUITPROTECTION
.THERMAL SHUTDOWN
DESCRIPTION
TheL4923isa highcurrentmonolithicvoltageregulatorwith verylow voltagedrop(0.70 V max at 1 A,
=25°C).
T
J
L4923
WITHRESET AND INHIBIT
Hept aw att
ORDERING NUMBER : L492 3
The device is internally protected against load
dumps transient of + 60 V, input overvoltage, reversepolarity,overheatingandoutputshortcircuit:
thankstothesefeaturesthe L4923is verysuitedfor
theautomotiveand industrialapplications.
The reset function is very useful for power off and
poweron informationwhen supplyinga microprocessor.
The inhibit function reduces drastically the consumptionwhenno loadcurrentisrequired: typically
thestandbycurrentvalueis 300µA.
BLOCK DIAGRAM
June 2000
Thisis advanced informationon a new product now in development or undergoing evaluation. Detailsaresubjectto change withoutnotice.
1/6
L4923
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
V
D
T
J
T
op
T
stg
Note:The circuit isESD protectedaccording to MIL-STD-883C
THERMAL DATA
Symbol Parameter Value Unit
R
th j-case
PI N CONNECTION
DC Input Voltage 35 V
i
DC Reverse Voltage – 18 V
r
Positive Load Dump Protection (t = 300ms) 60 V
Junction Temperature range – 40 to 150
Operating Temperature Range – 40 to 125
Storage Temperature Range – 55 to 150
Thermal Resistance Junction Case 4
C/W
°
°C
°C
°C
Figure1 : ApplicationCircuit.
(*)RECOMMENDED VALUE : C0=47µF, ESR <10Ω,(I
2/6
> 10 mA) OVER FULL T
out
range
.
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