SC4517A Просмотр технического описания (PDF) - Semtech Corporation
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SC4517A Datasheet PDF : 15 Pages
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SC4517A
POWER MANAGEMENT
Application Information (Cont.)
Design Example 1. 12V to 3.3V.
VI=12V
C3
2.2u
4.75k
R4
2 IN
5 EN
8 SYNC
SW 3
FB 6
COMP 7
SC4517A
C5
100p
C1
0.1u
D3
L1
4.7uH
C2
R1
2.2u
17.4k
Vo=3.3V
C4
1.5n
R2
10k
R3
4.75k
D2
Bill of Materials
Item
Qty
1
1
C1
2
2
C2, C3
3
1
C4
4
1
C5
5
1
D3
6
1
D2
7
1
L1
8
1
R1
9
1
R2
10
2
R3, R4
Reference
Value
0.1uF, 25V, 0805, X7R
2.2uF
1.5nF
100pF
1N4148WS, SOD-23
SS13
4.7uH,
17.4k
10k
4.75k
11
1
U1
SC4517A
Unless specified, all resistors have 1% precision with 0603 package.
Resistors are +/-1% and all capacitors are +/-20%
Part No./Manufacturer
TDK P/N: C3216X7R1E225K
Fairchild P/N: SS13
Cooper P/N: DR73-4R7
Semtech P/N:
SC4517AIMLTRT
2006 Semtech Corp.
12
www.semtech.com
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