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L4976 数据表(PDF) 10 Page - STMicroelectronics

部件名 L4976
功能描述  1A step down switching regulator
PDF  17 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L4976 数据表(HTML) 10 Page - STMicroelectronics

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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. VCC
Figure 19. Pulse by pulse limiting
current vs. junction
temperature.
0
5
10
15
20
25
VO(V)
82
84
86
88
90
92
94
96
η
(%)
D97IN737
100KHz
VCC=35V
IO=1.5A
200KHz
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4 IO(A)
60
65
70
75
80
85
90
η
(%)
D97IN740
VCC=8V
fsw=200KHz
VO=5.1V
VCC=12V
VCC=24V
VCC=48V
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4 IO(A)
55
60
65
70
75
80
85
90
η
(%)
D97IN741
VCC=8V
fsw=200KHz
VO=3.36V
VCC=12V
VCC=24V
VCC=48V
0
5
10
15
20
25
30 V0(V)
0
200
400
600
800
Pdiss
(mW)
D97IN744
IO=1.5A
VCC=35V
fsw=100KHz
IO=1A
IO=0.5A
0
1020304050
VCC(V)
70
75
80
85
η
(%)
D97IN742
V
0=5.1V-f
SW
=100KHz
IO=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 Tj(˚C)
2.3
2.4
2.5
2.6
2.7
2.8
2.9
Ilim
(A)
D97IN747
fsw=100KHz
VCC=35V



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