Datasheet

L4976 Typical charcteristics
9/17
Figure 8. Load regulation Figure 9. Switching frequency vs. input
voltage
Figure 10. Switching frequency vs.
junction temperature
Figure 11. Efficiency vs. output current
Figure 12. Dropout voltage between pin 5
and 4
Figure 13. Efficiency vs. output current
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 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
0.0 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 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