L4976 Ver la hoja de datos (PDF) - STMicroelectronics
Número de pieza
componentes Descripción
Fabricante
L4976 Datasheet PDF : 17 Pages
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L4976
Typical charcteristics
Figure 8. Load regulation
Figure 9. Switching frequency vs. input
voltage
VO
(V)
3.377
3.376
D97IN733
Tj=125˚C
fsw
(KHz)
107.5
105.0
D97IN735
3.375
3.374
Tj=25˚C
102.5
100.0
Tj=25˚C
3.373
97.5
3.372
95.0
3.371
3.370
0 5 10 15 20 25 30 35 40 45 50 VCC(V)
92.5
90.0
0 5 10 15 20 25 30 35 40 45 50 VCC(V)
Figure 10. Switching frequency vs.
junction temperature
fsw
(KHz)
D97IN785
Figure 11. Efficiency vs. output current
∆V
D97IN736
(V)
0.5
Tj=125˚C
105
0.4
Tj=25˚C
100
0.3
0.2
Tj=-25˚C
95
0.1
90
-50
0
0.0
50
100
Tj(˚C)
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 IO(A)
Figure 12. Dropout voltage between pin 5 Figure 13. Efficiency vs. output current
and 4
∆V
D97IN736
η
D97IN739
(V)
(%)
0.5
Tj=125˚C
90
VCC=8V
0.4
Tj=25˚C
85 VCC=12V
VCC=24V
80
0.3
75
VCC=48V
0.2
Tj=-25˚C
70
fsw=100KHz
0.1
VO=3.36V
65
0.0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 IO(A)
60
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 IO(A)
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