E-L4973D3.3-TR STMICROELECTRONICS [STMicroelectronics], E-L4973D3.3-TR Datasheet - Page 19

• Manufacturer Part Number: E-L4973D3.3-TR
• Description: 3.5A step down switching regulator
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

L4973
Figure 39. Soft start capacitor selection
Lomax
(µH)
150
100
50
0
15
20
vs. inductor and V
AN938)
f
sw
= 200KHz
25
30
35
40
45
CC
D97IN654
max (ref.
50
Vi(V)
Figure 40. Open loop frequency and
GAIN
-100
-150
-200
(dB)
-50
50
0
10
10
2
phase of error amplifier
10
3
10
4
10
Typical characteristics
5
10
6
Phase
GAIN
10
7
10
D97IN663
8
f(Hz)
Phase
135
45
90
0
19/27