SC198 Semtech, SC198 Datasheet - Page 11

• Manufacturer Part Number: SC198
• Description: Dual DC-DC Buck Converter
• Manufacturer: Semtech

PCB Layout Considerations
Poor layout can degrade the performance of the DC-DC converter and can be a contributory factor in EMI problems,
ground bounce, thermal issues, and resistive voltage losses. Poor regulation and instability can result.
The following design rules are recommended:
1.
2.
3.
Note:
Control pin routings are not shown.
POWER MANAGEMENT
Applications Information (Cont.)
© 2007 Semtech Corp.
Place the inductor and fi lter capacitors as close to the device as possible and use short wide traces between the
power components.
Route the output voltage feedback path away from inductor and LX node to minimize noise and magnetic
interference.
Use a ground plane to further reduce noise interference on sensitive circuit nodes.
VOUTA
GND
LXA
CinA
CinR
SC198
VIN
11
CinB
LXB
GND
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VOUTB
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SC198