L387A Datasheet, PDF (1/6 Pages) STMicroelectronics – VERY LOW DROP 5V REGULATOR WITH RESET

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
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