Datasheet

9/13
L4971
Figure 24. Load transient.
Figure 25. Line transient.
Figure 26. Soft start capacitor selection Vs
inductor and Vccmax.
Figure 27. Soft start capacitor selection vs.
Inductor and Vccmax
Figure 28. Open loop frequency and phase of
error amplifier
2
1
D97IN786
V
CC
(V)
30
20
10
V
O
(mV)
100
0
-100
1ms/DIV
I
O
= 1A
f
sw
= 100KHz
15 20 25 30 35 40 45 50 V
CCmax
(V)
0
100
200
300
400
L
(µH)
D97IN745
680nF
fsw=100KHz
470nF
330nF
220nF
100nF
15 20 25 30 35 40 45 50 V
CC
max(V)
0
100
200
300
L
(µH)
56nF
fsw=200KHz
D97IN746
47nF
33nF
22nF
10 10
3
10
5
10
7
f
(
Hz
)
10
2
10
4
10
6
10
8
-200
-150
-100
-50
GAIN
(dB)
0
50
Phase
0
45
90
135
D97IN787
GAIN
Phase