 English |
|
|
|
|
|
|
|
| E-L4971 Datasheet, PDF (7/13 Pages) STMicroelectronics – 1.5A STEP DOWN SWITCHING REGULATOR | |||
| |||
| ◁ |
L4971
Figure 12. Switching Frequency vs. input
voltage.
fsw
(KHz)
107.5
D97IN735
105.0
102.5
Tj=25ËC
100.0
97.5
95.0
92.5
90.0
0 5 10 15 20 25 30 35 40 45 50 VCC(V)
Figure 13. Switching frequency vs. junction
temperature.
fsw
(KHz)
D97IN785
105
100
95
90
-50
0
50
100
Tj(ËC)
Figure 14. Dropout voltage between pin 5 and 4
âV
D97IN736
(V)
0.5
Tj=125ËC
0.4
Tj=25ËC
0.3
0.2
Tj=-25ËC
0.1
0.0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 IO(A)
Figure 15. Efficiency vs output voltage.
η
(%)
96
94
92
90
88
86
84
82
0
100KHz
D97IN737
200KHz
VCC=35V
IO=1.5A
5 10 15 20 25 VO(V)
Figure 16. Efficiency vs. output current.
η
(%)
D97IN738
VCC=8V
90
VCC=12V
85
VCC=24V
80
75
VCC=48V
70
65
fsw=100KHz
VO=5.1V
60
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 IO(A)
Figure 17. Efficiency vs. output current.
η
(%)
D97IN739
90
VCC=8V
85 VCC=12V
VCC=24V
80
75
VCC=48V
70
fsw=100KHz
VO=3.36V
65
60
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 IO(A)
7/13
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese