UM3501 EV Board User’s Guide
http://www.union-ic.com
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2) The input capacitor, as well as the inductor and output capacitor, should be placed
as close as possible to the IC pins. In particular, the input capacitor needs to be placed
as close as possible to the IC pins, directly across the Vin and GND pin.
3) The feedback resistor network must be routed away from the inductor and switch
node to minimize noise and magnetic interference. To further minimize noise from
coupling into the feedback network and feedback pin, the ground plane or ground
traces must be used for shielding.
