L4945 데이터 시트보기 (PDF) - STMicroelectronics

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L4945

5V VERY LOW DROP VOLTAGE REGULATOR

STMicroelectronics 

®

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

1/6

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