SC4505 Ver la hoja de datos (PDF) - Semtech Corporation
Número de pieza
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Fabricante
SC4505 Datasheet PDF : 15 Pages
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SC4505
POWER MANAGEMENT
Applications Information
Layout Guideline
The SC4505 contains a boost converter. The placements
of the power components outside the SC4505 should
follow the guideline of general boost converter layout.
The application circuit (Figure 7a) will be used as an
example. The layout illustration diagram is shown as in
Figure 6a and Figure 6b.
As shown in Figure 6a, C1 serves as decoupling capacitor
for the SC4505. It should be placed close to the VIN
and PGND of SC4505 to achieve the best performance.
C2 is the input power filtering capacitor for the boost
converter power train. L1 is the boost converter input
inductor. D5 is the output rectifying diode. It is
recommended that a schottky diode is used for fast
reverse recovery.
EN_BL
EN_FL
FL_TRB
VIN
PGND
VIN
R3
R4
R2
C7
C8
SC4505
C1
1
C2
L1
4
D5
D9
D8
D7
D6
D4
VOUT
D3
D2
D1
Figure 6a Layout Illustration -- Top Layer
C4
SC4505
VIN
PGND
VIN
2007 Semtech Corp.
C6
C5
C3
VOUT
Figure 6b Layout Illustration -- Bottom Layer
12
www.semtech.com
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