SC198A Semtech, SC198A Datasheet - Page 13

• Manufacturer Part Number: SC198A
• Description: Dual DC-DC Buck Converter
• Manufacturer: Semtech

Applications Information (continued)
PCB Layout Considerations
Poor layout can degrade the performance of the DC-DC
converter and can be a contributory factor in EMI prob-
lems, ground bounce, thermal issues, and resistive voltage
losses. Poor regulation and instability can result.
The following design rules are recommended:
1.
2.
3.
GND
VOUTA
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.
LXA
GND
Cin
A
VIN
GND
Cin
LXB
B
VOUTB
GND
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