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L4973 Fiches technique(PDF) 19 Page - STMicroelectronics

No de pièce L4973
Description  3.5A step down switching regulator
PDF  27 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L4973 Fiches technique(HTML) 19 Page - STMicroelectronics

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L4973
Typical characteristics
19/27
Figure 39. Soft start capacitor selection
vs. inductor and VCC max (ref.
AN938)
Figure 40. Open loop frequency and
phase of error amplifier
15
20
25
30
Vi(V)
40
35
45
50
0
50
100
150
Lomax
(
µH)
D97IN654
Css=22nF
Css=33nF
fsw = 200KHz
10
103
105
107
f(Hz)
102
104
106
108
-200
-150
-100
-50
GAIN
(dB)
0
50
Phase
0
45
90
135
D97IN663
GAIN
Phase



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