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PDF L387 Data sheet ( Hoja de datos )

Número de pieza L387
Descripción VERY LOW DROP 5V REGULATOR WITH RESET
Fabricantes STMicroelectronics 
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No Preview Available ! L387 Hoja de datos, Descripción, Manual

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
35
–55 to 150
Unit
V
°C
APPLICATION CIRCUIT
* Min 33 µF and max. ESR 3 over temperature range.
October 1991
1/6

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L387 pdf
PENTAWATT PACKAGE MECHANICAL DATA
DIM.
A
C
D
D1
E
F
F1
G
G1
H2
H3
L
L1
L2
L3
L5
L6
L7
M
M1
Dia
MIN.
2.4
1.2
0.35
0.8
1
10.05
2.6
15.1
6
3.65
mm
TYP.
3.4
6.8
17.85
15.75
21.4
22.5
4.5
4
MAX.
4.8
1.37
2.8
1.35
0.55
1.05
1.4
10.4
10.4
3
15.8
6.6
3.85
MIN.
0.094
0.047
0.014
0.031
0.039
0.126
0.260
0.396
0.102
0.594
0.236
0.144
inch
TYP.
0.134
0.268
0.703
0.620
0.843
0.886
0.177
0.157
L387A
MAX.
0.189
0.054
0.110
0.053
0.022
0.041
0.055
0.142
0.276
0.409
0.409
0.118
0.622
0.260
0.152
L
L1
L2
L5 L3
Dia.
L7
L6
5/6

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