Datasheet

Typical characteristics L4973
20/28
Figure 37. Source current rise and fall
time, pin 2, 3 (see Figure 4)
Figure 38. Soft-start capacitor selection
vs. inductor and V
CC
max (ref.
AN938)
Figure 39. Soft-start capacitor selection
vs. inductor and V
CC
max (ref.
AN938)
Figure 40. Open loop frequency and
phase of error amplifier
25 30 35 40 Vi
(
V
)
5045
0
50
100
150
Lomax
(μH)
200
250
300
D97IN653
Css=100nF
Css=220nF
Css=470nF
Css=680nF
Css=820nF
Css=1μF
f
sw
= 100KHz
15 20 25 30 Vi
(
V
)
4035 45 50
0
50
100
150
Lomax
(μH)
D97IN654
Css=22nF
Css=33nF
Css=47nF
Css=56nF
Css=68nF
f
sw
= 200KHz
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
D97IN663
GAIN
Phase