Diodes AP3435 - Manual (Page 14)

Preliminary Datasheet
1.0MHz, 3.5A, Synchronous Step Down DC-DC Converter AP3435
Dec. 2012 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
14
Application Information (Continued)
9. PCB Layout Considerations
When laying out the printed circuit board, the
following checklist should be used to optimize the
performance of AP3435.
1) The power traces, including the GND trace, the SW
trace and the VIN trace should be kept direct, short
and wide.
2) Put the input capacitor as close as possible to the
VIN and GND pins.
3) The FB pin should be connected directly to the
feedback resistor divider.
4) Keep the switching node, SW, away from the
sensitive FB pin and the node should be kept small
area.