L4945 Datasheet, PDF (1/6 Pages) STMicroelectronics – 5V VERY LOW DROP VOLTAGE REGULATOR

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L4945
5V VERY LOW DROP VOLTAGE REGULATOR
5V ± 4% PRECISE OUTPUT VOLTAGE
OVER FULL TEMPERATURE RANGE
(– 40 / 125 °C)
VERY LOW VOLTAGE DROP (0.75Vmax)
OVER FULL TEMPERATURE RANGE
OUTPUT CURRENT UP TO 500mA
OVERVOLTAGE AND REVERSE VOLTAGE
PROTECTIONS
REVERSE VOLTAGE PROTECTION
SHORT CIRCUIT PROTECTION AND THER-
MAL SHUT-DOWN (with hysteresis)
LOW START UP CURRENT
DESCRIPTION
The L4945 is a monolithic integrated circuit in
Versawatt package specially designed to provide
a stabilized supply voltage for automotive and in-
dustrial electronic systems. Thanks to their very
low voltage drop, in automotive applications the
devices can work correctly even during the crank-
BLOCK DIAGRAM
TO220
ORDERING NUMBER: L4945
ing phase, when the battery voltage could fall as
low as 6V. Furthermore, they incorporate a com-
plete range of protection circuits against the dan-
gerous overvoltages always present on the bat-
tery rail of the car.
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
March 1999
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