Datasheet

7/13
L4971
Figure 12. Switching Frequency vs. input
voltage.
Figure 13. Switching frequency vs. junction
temperature.
Figure 14. Dropout voltage between pin 5 and 4
Figure 15. Efficiency vs output voltage.
Figure 16. Efficiency vs. output current.
Figure 17. Efficiency vs. output current.
0 5 10 15 20 25 30 35 40 45 50 V
CC
(V)
90.0
92.5
95.0
97.5
100.0
102.5
105.0
107.5
fsw
(KHz)
D97IN735
Tj=25˚C
-50 0 50 100 T
j(
˚C
)
90
95
100
105
fsw
(KHz)
D97IN785
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 I
O
(A)
0.0
0.1
0.2
0.3
0.4
0.5
∆
V
(V)
Tj=25˚C
Tj=125˚C
D97IN736
Tj=-25˚C
0 5 10 15 20 25 V
O
(V)
82
84
86
88
90
92
94
96
η
(%)
D97IN737
100KHz
V
CC
=35V
I
O
=1.5A
200KHz
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 I
O
(A)
60
65
70
75
80
85
90
η
(%)
D97IN738
V
CC
=8V
fsw=100KHz
V
O
=5.1V
V
CC
=12V
V
CC
=24V
V
CC
=48V
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 I
O
(A)
60
65
70
75
80
85
90
η
(%)
D97IN739
V
CC
=8V
fsw=100KHz
V
O
=3.36V
V
CC
=12V
V
CC
=24V
V
CC
=48V