L4973 Ver la hoja de datos (PDF) - STMicroelectronics
Número de pieza
componentes Descripción
Fabricante
L4973 Datasheet PDF : 27 Pages
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Application ideas
8
Application ideas
L4973
Figure 41. 3.5A at VO < 3.3V (see part list Figure 4)
VCC
R2
C1 C2 C7
C3
INH SYNC
7,8
1
17
11
10
18
9
L4973V3.3
2,3
4,5,6
16 13,14,15 12
R5
C5
R1
C4
C6
VP
1
1.5
2
2.5
C8
3
L1
R5
3.6K
2K
4.7K
7.5K
5.1K
R3
4.7K
2K
3.6K
3.6K
1K
Vo
VO=3.36-1.74•
R3
R5
D1
3x
R3
C0
D97IN666A
Figure 42. 12V to 3.3V high performance buck converter (fsw = 200kHz)
VCC
12V±5%
C1
560uF-25V
HFQ
Panasonic
R2
22k
C7
1.2nF
C2
220nF C3 C4
33nF 1uF
INH
SYNC
7,8 10
18
9
1
17 L4973V3.3
16
11
4,5,6
13,14,15
2,3
12
C5
220pF
R1
D1
9k1
C6
22nF
C8
220nF
L1
C9
470uF-25V
HFQ
Panasonic
L1 KoolMm 77120- 24 Turns- 0.9mm
D1 STPS1025
D97IN668A
Vo=3.33V
Io=3.5A
η
(%)
92
90
88
86
84
82
80
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 Io(A)
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