L4955 查看數據表（PDF） - STMicroelectronics
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L4955 Datasheet PDF : 14 Pages
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L4955
ABSOLUTE MAXIMUM RATINGS
Symbol
VIN
PTOT
Tst, Ti
Parameter
Supply Input Voltage
ADJ and CL pins
PG and INH pins
Power Dissipation @ Tamb = 50°C
Power Dissipation @ Tcase = 90°C
Storage Temperature
Value
24
-0.3 to 4
0 to VIN
2
15
-40 to +150
Unit
V
V
V
W
W
°C
PIN CONNECTIONS (Top views)
tab connected to pin 4
7
OUT
6
PG
5
ADJ
4
GND
3
INH
2
CL
1
IN
D96IN367
HEPTAWATT
3
OUT
GND
1
IN
D96IN369
VERSAWATT
(TO220)
BLOCK DIAGRAM
VIN
10µF
IN
1(1)
VREF=
1.26V
FIXED
C.L.
FOLDBACK
CHARGE
PUMP
PRE
REGULATOR
+
E/A
-
PROGRAM.
C.L.
3
INH
1.26V
INHIBIT
ACTIVE HIGH
VREF
+
-
PIN x = HEPTAWATT
PIN (x) = VERSAWATT
2
CL
RCL
(1/4W, 1%)
0.9VREF
4(2)
GND
BUFFER
THERMAL
SHUTDOWN
6
PG
POWER
DMOS
150mΩ
7(3)
5
OUT
R1
ADJ
R2
D96IN366
VOUT
22µF
2/14
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