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PDF L4945 Data sheet ( Hoja de datos )

Número de pieza L4945
Descripción 5V VERY LOW DROP VOLTAGE REGULATOR
Fabricantes STMicroelectronics 
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No Preview Available ! L4945 Hoja de datos, Descripción, Manual

® L4945
5V VERY LOW DROP VOLTAGE REGULATOR
5V ± 4% PRECISE OUTPUT VOLTAGE
OVER FULL TEMPERATURE RANGE
(– 40 / 125 °C)
VERY LOW VOLTAGE DROP (0.75Vmax)
OVER FULL TEMPERATURE RANGE
OUTPUT CURRENT UP TO 500mA
OVERVOLTAGE AND REVERSE VOLTAGE
PROTECTIONS
REVERSE VOLTAGE PROTECTION
SHORT CIRCUIT PROTECTION AND THER-
MAL SHUT-DOWN (with hysteresis)
LOW START UP CURRENT
DESCRIPTION
The L4945 is a monolithic integrated circuit in
Versawatt package specially designed to provide
a stabilized supply voltage for automotive and in-
dustrial electronic systems. Thanks to their very
low voltage drop, in automotive applications the
devices can work correctly even during the crank-
BLOCK DIAGRAM
TO220
ORDERING NUMBER: L4945
ing phase, when the battery voltage could fall as
low as 6V. Furthermore, they incorporate a com-
plete range of protection circuits against the dan-
gerous overvoltages always present on the bat-
tery rail of the car.
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
March 1999
1/6

1 page




L4945 pdf
DIM.
A
C
D
E
F
F1
F2
G
G1
H2
L2
L4
L5
L6
L7
L9
M
Dia
MIN.
4.40
1.23
2.40
0.49
0.61
1.14
1.14
4.95
2.40
10.0
13.0
2.65
15.25
6.20
3.50
3.75
mm
TYP.
16.4
2.6
inch
MAX. MIN. TYP. MAX.
4.60 0.173
0.181
1.32 0.048
0.051
2.72 0.094
0.107
0.70 0.019
0.027
0.88 0.024
0.034
1.70 0.044
0.067
1.70 0.044
0.067
5.15 0.194
0.203
2.70 0.094
0.106
10.4 0.393
0.409
0.645
14.0 0.511
0.551
2.95 0.104
0.116
15.75 0.600
0.620
6.60 0.244
0.260
3.93 0.137
0.154
0.102
3.85 0.147
0.151
L4945
OUTLINE AND
MECHANICAL DATA
Versawatt (TO220)
TO220MEC
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