參數(shù)資料
型號(hào): L4971D
廠商: STMICROELECTRONICS
元件分類: 穩(wěn)壓器
英文描述: 3 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDSO16
封裝: SO-16
文件頁(yè)數(shù): 13/13頁(yè)
文件大小: 571K
代理商: L4971D
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
VCC
(V)
30
20
10
VO
(mV)
100
0
-100
1ms/DIV
IO = 1A
fsw = 100KHz
15
20
25
30
35
40
45
50 VCCmax(V)
0
100
200
300
400
L
(
H)
D97IN745
680nF
fsw=100KHz
470nF
330nF
220nF
100nF
15
20
25
30
35
40
45
50 VCCmax(V)
0
100
200
300
L
(
H)
56nF
fsw=200KHz
D97IN746
47nF
33nF
22nF
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
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