SC4521EVB View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SC4521EVB' PDF : 18 Pages View PDF
SC4521
POWER MANAGEMENT
Application Information (Cont.)
Design Example 3: 13V ~ 21V to 3.3V at 1A
C1
D3
0.22u
VI
R0
2 IN
SW 3
0
C3
Rss
4.7u
200k
5 EN
FB 6
L1
10uH
R1
24.9k
Vo=3.3V
C2
10u
8 SS
COMP 7
Css
330n
SC4521
C5
560p
C4
18n
R3
3.83k
R2
8.25k
D2
Note: The bottom pad needs a big copper area to remove the heat.
Item
1
Qty
1
C1
Reference
Bill of Materials
Value
0.22uF, 25V, 0805, X7R
2
1
C2
10uF
3
1
C3
4
1
C4
5
1
C5
6
1
D2
7
1
D3
4.7uF, 1206, 25V, X5R
18nF, 0805, X7R, 25V
560pF, 50V, 0805
1N4148WS, SOD323
8
1
L1
10uH
9
1
R0
0, 0805
10
1
R1
24.9k, 1%, 0805
11
1
R2
8.25k, 1%, 0805
12
1
R3
3.83k, 1%, 0805
13
-
Rss
200k, 0805
14
1
Css
330nF, 0805
15
1
U1
SC4521
Unless specified, all resistors have 1% precision with 0805 package.
Resistors are +/-1% and all capacitors are +/-20%
2007 Semtech Corp.
13
Part No./Manufacturer
Vishay: VJ0805Y224KXX
Taiyo-Yuden:
EDK316BJ106MF-T
Panasonic
Vishay
Vishay
Nihon-International: EC31QS04
Sumida:
CDRH6D38NP-100NC
SMTZONE
SMTZONE
SMTZONE
Semtech
www.semtech.com
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