L4973V3 - L4973V5 - L4973D3 - L4973D5
Figure 1c:
Application Circuit (see fig. 1 part list)
V
CC
R2
INH
SYNC
7,8
1
17
10
18
9
C8
L4973V5.1
11
4,5,6
13,14,15 12
L1
2,3
Vo
C1
C2
C7
16
C3
C4
C5
R1
C6
D1
3x
C0
C12
D97IN665A
Figure 1d:
Application Circuit (see fig. 1 part list)
V
CC
R2
INH
SYNC
7,8
1
17
10
18
9
C8
L4973V3.3
11
4,5,6
13,14,15
L1
12
2,3
Vo
C1
C2
C7
16
C3
C4
C5
R1
C6
D1
3x
C0
C12
D97IN664A
Figure 2:
Quiescent Drain Current vs. Input
Voltage (0% Duty Cycle)
Ibias
(mA)
5.0
4.5
4.0
100KHz-R2=20K
C7=2.7nF
Tamb=25°C
0% DC
Figure 3:
Quiescent Drain Current vs. Junction
Temperature
Ibias
(mA)
D97IN634
200KHz-R2=22K
C7=1.2nF
D97IN633A
200KHz-R2=22K
C7=1.2nF
4.0
100KHz-R2=20K
C7=2.7nF
3.5
3.5
0Hz
0% DC
V
CC
= 35V
3.0
2.5
2.0
0
10
20
30
40
50 V
CC
(V)
3.0
0Hz
2.5
-50
0
50
100
Tj(°C)
7/16
STMICROELECTRONICS [ STMICROELECTRONICS ]
