Datasheet

Typical charcteristics L4976
10/17
Figure 14. Efficiency vs output voltage Figure 15. Efficiency vs. output current
Figure 16. Efficiency vs. output current Figure 17. Efficiency vs. Vo
Figure 18. Efficiency vs. V
CC
Figure 19. Pulse by pulse limiting
current vs. junction
temperature.
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 0.2 0.4 0.6 0.8 1.0 1.2 1.4 I
O
(A)
60
65
70
75
80
85
90
η
(%)
D97IN740
V
CC
=8V
fsw=200KHz
V
O
=5.1V
V
CC
=12V
V
CC
=24V
V
CC
=48V
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 I
O
(A)
55
60
65
70
75
80
85
90
η

(%)
D97IN741
V
CC
=8V
fsw=200KHz
V
O
=3.36V
V
CC
=12V
V
CC
=24V
V
CC
=48V
0 5 10 15 20 25 30 V
0
(V)
0
200
400
600
800
Pdiss
(mW)
D97IN744
I
O
=1.5A
V
CC
=35V
fsw=100KHz
I
O
=1A
I
O
=0.5A
0 1020304050V
CC
(V)
70
75
80
85
η
(%)
D97IN742
V
0
=5.1V-f
SW
=100KHz
I
O
=1.5A
V
0
=5.1V-f
SW
=200KHz
V
0
=3.36V-f
SW
=100KHz
V
0
=3.36V-f
SW
=
2
00KHz
-50 -25 0 25 50 75 100 125 T
j(
˚C
)
2.3
2.4
2.5
2.6
2.7
2.8
2.9
Ilim
(A)
D97IN747
fsw=100KHz
V
CC
=35V