参数资料
型号: L4978
厂商: STMICROELECTRONICS
元件分类: 稳压器
英文描述: 3.5 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDIP8
封装: MINI, PLASTIC, DIP-8
文件页数: 11/13页
文件大小: 581K
代理商: L4978
7/13
L4978
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 VCC(V)
90.0
92.5
95.0
97.5
100.0
102.5
105.0
107.5
fsw
(KHz)
D97IN735
Tj=25C
-50
0
50
100
Tj(C)
90
95
100
105
fsw
(KHz)
D97IN785
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
IO(A)
1.6 1.8
0.0
0.1
0.2
0.3
0.4
0.5
V
(V)
0.6
0.7
Tj=25C
Tj=125C
D98IN836
Tj=-25C
0
5
10
15
20
25
30
80
82
84
86
88
90
92
94
96
98
Vo [V]
[%]
fsw=100kHz
fsw=200kHz
Vcc=35V
Io=2A
Vcc=12V
Vcc=8V
0
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6 1.8
2
2.2
60
65
70
75
80
85
90
95
Io [A]
[%]
Vcc=8V
Vcc=12V
Vcc=24V
Vcc=48V
fsw=100kHz
Vo=5.1V
0
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6 1.8
2
2.2
60
65
70
75
80
85
90
95
Io [A]
[%]
Vcc=8V
Vcc=12V
Vcc=24V
Vcc=48V
Vo=3.36V
fsw=100kHz
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