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L4973D3.3 데이터시트(PDF) 3 Page - STMicroelectronics

부품명 L4973D3.3
상세설명  3.5A step down switching regulator
PDF  27 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L4973D3.3 데이터시트(HTML) 3 Page - STMicroelectronics

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L4973
Block diagram
3/27
1
Block diagram
Figure 2.
Block diagram
2
Pin settings
2.1
Pin connection
Figure 3.
Pin connection (top view)
VREF
GOOD
5.1V
COMP
VFB
SYNC
BOOT
DRIVER
HICCUP CURRENT
LIMITING
INTERNAL
REFERENCE
SS
INH
ZERO CURRENT
INHIBIT
D94IN161B
+
-
3.3V
V5.1
E/A
SOFT
START
5.1V
3.3V
THERMAL
SHUTDOWN
INTERNAL
SUPPLY
5.1V
-
+
PWM
CURRENT
LIMITING
R
S
Q
Q
CBOOT
CHARGE
OSCILLATOR
OUT
OUT
GND
OSC
VCC
VCC
17(19)
11(12)
12(13)
18(20)
1(1)
2(2)
3(3)
9(10)
8(9)
7(8)
16(18)
10(11)
4,5,6,13,14,15
(4,5,6,7,14,15,16,17)
Pin x = Powerdip
Pin (x) = S020
OSC
OUT
OUT
GND
GND
VCC
GND
VCC
BOOT
1
3
2
4
5
6
7
8
9
INH
VFB
COMP
GND
GND
GND
V5.1
SS
SYNC
18
17
16
15
14
12
13
11
10
D94IN162A
OSC
OUT
OUT
GND
GND
GND
GND
VCC
VCC
VFB
COMP
GND
GND
GND
GND
V5.1
SS
SYNC
1
3
2
4
5
6
7
8
9
18
17
16
15
14
12
13
11
19
10
20
BOOT
INH
D94IN163A
DIP -18 (12+3+3)
SO20 (12+4+4)



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