L387 Просмотр технического описания (PDF) - STMicroelectronics

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L387

VERY LOW DROP 5V REGULATOR WITH RESET

STMicroelectronics 

L387A

VERY LOW DROP 5V REGULATOR WITH RESET

. PRECISE OUTPUT VOLTAGE (5 V ± 4 %)

. VERY LOW DROPOUT VOLTAGE

. OUTPUT CURRENT IN EXCESS OF 500mA

. POWER-ON, POWER-OFF INFORMATION

(RESET FUNCTION)

. HIGH NOISE IMMUNITY ON RESET DELAY

CAPACITOR

DESCRIPTION

The L387A is a very low drop voltage regulator in

a Pentawatt® package specially designed to pro-

vide stabilized 5V supplies in consumer and in-

dustrial applications. Thanks to its very low in-

put/output voltage drop this device is very useful

in battery powered equipment, reducing con-

sumption and prolonging battery life. A reset out-

put makes the L387A particularly suitable for mi-

croprocessor systems. This output provides a re-

set signal when power is applied (after an exter-

nal programmable delay) and goes low when

ABSOLUTE MAXIMUM RATINGS

Symbol

Vi

Tj, Tstg

Parameter

D.C. Input Voltage

Junction and Storage Temperature Range

Pentawatt®

ORDERING NUMBER : L387A

power is removed, inhibiting the microprocessor.

An hysteresis on reset delay capacitor raises the

immunity to the ground noise.

Value

Unit

35

V

–55 to 150

°C

APPLICATION CIRCUIT

* Min 33 µF and max. ESR ≤ 3 Ω over temperature range.

October 1991

1/6

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