E-L4973D3.3-TR STMICROELECTRONICS [STMicroelectronics], E-L4973D3.3-TR Datasheet - Page 18

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

Typical characteristics
18/27
Figure 35. Load transient
Figure 37. Source current rise and fall
2
1
(A)
I
3
2
1
O
200µs/DIV
time, pin 2, 3 (see
T
T
V
f
sw
CC
= 100KHz
= 35V
Figure
D97IN649
(mV)
-100
100
V
4)
0
O
Figure 36. Line transient
Figure 38. Soft start capacitor selection
V
1
2
(V)
30
20
10
Lomax
CC
(µH)
300
250
200
150
100
50
0
25
1ms/DIV
vs. inductor and V
AN938)
30
f
sw
= 100KHz
35
40
I
f
O
sw
Css=1µF
= 1A
= 100KHz
45
CC
D97IN650
Css=470nF
Css=220nF
Css=100nF
Css=820nF
50
Css=680nF
D97IN653
max (ref.
Vi(V)
(mV)
-100
100
L4973
V
0
O