Datasheet

L4971
6/13
Figure 6. Quiescent drain current vs. input
voltage.
Figure 7. Quiescent current vs. junction
temperature
Figure 8. Stand-by drain current vs. input
voltage
Figure 9. Line Regulation
Figure 10. Line Regulation
Figure 11. Switching frquency vs. R1 and C2
0 5 10 15 20 25 30 35 40 45 50
Vcc(V)
1
2
3
4
5
Iq
(mA)
200KHz
R
1
=22K
C
2
=1.2nF
0Hz
D97IN724
Tamb=25˚C
0% DC
100KHz
R
1
=20K
C
2
=2.7nF
-50 -30 -10 10 30 50 70 90 110 Tj(˚C)
1
2
3
4
5
Iq
(mA)
D97IN731
0Hz
200KHz
R
1
=22K
C
2
=1.2nF
V
CC
=35V
0% DC
100KHz
R
1
=20K
C
2
=2.7nF
0 5 10 15 20 25 30 35 40 45 50 V
CC
(V)
60
70
80
90
100
110
120
130
140
150
Ibias
(µA)
D97IN732
Tj=25˚C
Tj=125˚C
Vss=GND
0 5 10 15 20 25 30 35 40 45 50 V
CC
(V)
3.370
3.371
3.372
3.373
3.374
3.375
3.376
3.377
V
O
(V)
D97IN733
Tj=25˚C
Tj=125˚C
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 I
O
(A)
3.360
3.362
3.364
3.366
3.368
3.370
3.372
3.374
3.376
3.378
V
O
(V)
Tj=25˚C
Tj=125˚C
V
CC
=35V
D97IN734
0 20 40 60 80 R1(K Ω )
5
10
20
50
100
200
500
fsw
(KHz)
D97IN784
0.82nF
1.2nF
2.2nF
3.3nF
4.7nF
5.6nF
Tamb=25˚C