L387A

October 1991

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

ORDERING NUMBER : L387A

Pentawatt

®

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

DESCRIPTION

power is removed, inhibiting the microprocessor.

An hysteresis on reset delay capacitor raises the

immunity to the ground noise.

APPLICATION CIRCUIT

* Min 33

µF and max. ESR ≤ 3 Ω over temperature range.

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

D.C. Input Voltage

35

V

Junction and Storage Temperature Range

–55 to 150

°C

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