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L4973 Datasheet(PDF) 17 Page - STMicroelectronics

Part # L4973
Description  3.5A step down switching regulator
PDF  27 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L4973 Datasheet(HTML) 17 Page - STMicroelectronics

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L4973
Typical characteristics
17/27
Figure 31. Efficiency vs. output current
(see Figure 8)
Figure 32. Power dissipation vs. input
voltage (device only)
(see Figure 7)
Figure 33. Power dissipation vs. output
voltage (device only)
Figure 34. Pulse by pulse limiting
current vs.
junction temperature
0123
IO(A)
0.5
1.5
2.5
3.5
70
75
85
η
(%)
80
90
D97IN662
Vcc=48V
Vcc=12V
Vcc=24V
VO = 3.3V
fsw = 200KHz
0
10
30
40
Vcc(V)
20
50
0
0.5
1.0
1.5
Pdiss
(W)
D97IN647A
IO=3.5A
IO=3A
IO=2A
IO=2.5A
VO = 5.1V
fsw = 100KHz
0
5
15
20
VO(V)
10
25
30
0
0.5
1.0
1.5
Pdiss
(W)
2.0
2.5
3.0
D97IN648
IO=3.5A
IO=3A
IO=1A
IO=2A
IO=2.5A
VCC = 35V
fsw = 100KHz
-40 -20
60 80
Tj(˚C)
0
120
20 40
100
4.2
4.4
4.6
4.8
Ilim
(A)
5
5.2
D97IN652
Vcc=35



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