Make sure the VIN and GND traces are as wide as
possible to reduce trace impedance. The wide areas are also an advantage from
the view point of heat dissipation.
Place the input capacitor and output capacitor as close to the device as
possible to minimize trace impedance.
Provide sufficient vias for the input capacitor
and output capacitor.
Connect a separate VOUT path to the upper
feedback resistor.
Place a voltage feedback loop away from the
high-voltage switching trace, and preferably has
ground shield.
Make sure the trace of the FB node is as small as
possible to avoid noise coupling.
Make sure the GND trace between the output
capacitor and the GND pin are as wide as possible
to minimize the trace impedance.