SC4518H Просмотр технического описания (PDF) - Semtech Corporation
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SC4518H Datasheet PDF : 15 Pages
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POWER MANAGEMENT
Application Information (Cont.)
Design Example 1. 12V to 5V.
SC4518H
VI =12V
C3
10u
4.75k
R4
2
IN
5
EN
8
SYNC
3
SW
6
FB
7
COMP
SC4518H
C5
180p
C1
0.22u
D3
L1
10uH
R1
52.3k
Vo=5V
C2
47u
C4
6.8n
R3
8.06k
R2
10k
D2
Bill of Materials
Item
Qty
Reference
Value
1
1
C1
0.22uF, 25V, X7R, 0805
2
1
C2
47uF, 6.3V, 1210
3
1
C3
10uF, 25V, 1210
4
1
C4
5
1
C5
6
1
D3
7
1
D2
8
1
L1
9
1
R1
10
1
R2
11
1
R3
6.8nF, 25V, 0805
180pF, 50V, 0805
1N4148WS, SOD-323
SS23
10uH
52.3k, 1%, 0805
10k, 1%. 0805
8.06k, 0805
12
1
R4
4.75k, 0805
13
1
U1
SC4518H
Unless specified, all resistors have 1% precision with 0603 package.
Resistors are +/-1% and all capacitors are +/-20%
Part No./Manufacturer
Vishay P/N: VJ0805Y224KXX
Murata
Panasonic
Vishay
Vishay
Fairchild P/N: SS23
Cooper P/N: DR74-100
SMTZONE
SMTZONE
SMTZONE
SMTZONE
Semtech P/N: SC4518HSTRT
2007 Semtech Corp.
12
www.semtech.com
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