SGS Thomson Microelectronics L387A Datasheet
VERY LOW DROP 5V REGULATOR WITH RESET
.PRECISEOUTPUT VOLTAGE(5 V ± 4%)
.VERYLOW DROPOUTVOLTAGE
.OUTPUTCURRENT INEXCESSOF 500mA
.POWER-ON, POWER-OFF INFORMATION
(RESET FUNCTION)
.HIGH NOISE IMMUNITY ON RESET DELAY
CAPACITOR
L387A
DESCRIPTION
The L387A is a very low drop voltage regulator in
a Pentawatt
vide stabilized 5V supplies in consumer and industrial applications. Thanks to its very low input/output voltage drop this device is very useful
in battery powered equipment, reducing consumption and prolonging battery life. A reset output makes the L387A particularly suitable for microprocessor systems. This output provides a reset signal when power is applied (after an external programmable delay) and goes low when
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
T
j,Tstg
APPLICATION CIRCUIT
package specially designed to pro-
ORDERING NUMBER : L387A
power is removed, inhibiting the microprocessor.
An hysteresis on reset delay capacitor raises the
immunity to the ground noise.
V
D.C. Input Voltage 35 V
i
Junction and StorageTemperatureRange –55 to 150 °C
Pentawatt
* Min33 µF and max.ESR ≤ 3 Ω over temperaturerange.
October1991
1/6
L387A
PIN CONNECTION (Top views)
BLOCK DIAGRAM
THERMAL DATA
R
2/6
t h j-ca se
Thermal Resistance Junction-case Max 4 °C/W
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