L4973 STMicroelectronics, L4973 Datasheet - Page 7

• Manufacturer Part Number: L4973
• Description: 3.5A STEP DOWN SWITCHING REGULATOR
• Manufacturer: STMicroelectronics

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