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E-L4973V3.3 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
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E-L4973V3.3
3.5A step down switching regulator
STMicroelectronics
E-L4973V3.3 Datasheet PDF : 27 Pages
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L4973
1
Block diagram
Block diagram
Figure 2. Block diagram
INH
10(11)
ZERO CURRENT
INHIBIT
VREF
GOOD
17(19)
SS
11(12)
COMP
5.1V
3.3V +
E/A
VFB
-
12(13)
SOFT
START
THERMAL
SHUTDOWN
-
PWM
+
SYNC
18(20)
OSCILLATOR
Pin x = Powerdip
Pin (x) = S020
1(1)
OSC
5.1V
3.3V
V5.1
16(18)
INTERNAL
REFERENCE
V
CC
7(8)
V
CC
8(9)
CBOOT
CHARGE
INTERNAL
SUPPLY
5.1V
HICCUP CURRENT
LIMITING
CURRENT
LIMITING
RQ
SQ
BOOT
9(10)
4,5,6,13,14,15
(4,5,6,7,14,15,16,17)
GND
DRIVER
2(2)
OUT
3(3)
OUT
D94IN161B
2
2.1
Pin settings
Pin connection
Figure 3. Pin connection
(top view)
OSC
OUT
OUT
GND
GND
GND
V
CC
V
CC
BOOT
1
18
2
17
3
16
4
15
5
14
6
13
7
12
8
11
9
10
D94IN162A
SYNC
SS
V5.1
GND
GND
GND
VFB
COMP
INH
DIP -18 (12+3+3)
OSC
OUT
OUT
GND
GND
GND
GND
V
CC
V
CC
BOOT
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
D94IN163A
SO20 (12+4+4)
SYNC
SS
V5.1
GND
GND
GND
GND
VFB
COMP
INH
3/27
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