Datasheet

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