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L5971 Datasheet(PDF) 8 Page - STMicroelectronics

Part # L5971
Description  1.5A STEP DOWN SWITCHING REGULATOR
PDF  11 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L5971 Datasheet(HTML) 8 Page - STMicroelectronics

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22
24
26
28VCCmax(V)
0
40
80
120
160
L
(
µH)
D98IN952
fsw=100KHz
680nF
470nF
330nF
220nF
100nF
Figure 16. Soft start capacitor selection vs. In-
ductor and Vccmax
Figure 15. Load transient.
10
103
105
107
f(Hz)
102
104
106
108
-200
-150
-100
-50
GAIN
(dB)
0
50
Phase
0
45
90
135
D97IN787
GAIN
Phase
Figure 18. Open loop frequency and phase of
error amplifier.
20
22
24
26
28 VCCmax(V)
0
50
100
150
L
(
µH)
56nF
fsw=200KHz
D98IN953
47nF
33nF
22nF
Figure 17. Soft start capacitor selection vs. In-
ductor and Vccmax
L5971
8/11



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