...
RPP IC selection:
...
RPP diagram:
...
PCB Layout
Some guidelines in the datasheet of the Buck IC:
...
Initial layout:
...
Kevin’s feedback are as follows:
...
Some notes:
1. Top priority, input caps and output caps, Buck IC, and RPP circuit, then everything else;
2. the distance between the inductor and the switch node pin should be as close as possible;
3. the path for high current traces should be as large as possible (use polygon rather than traces for high current lines)
4. can move the RPP circuit down to leave more room for the BUCK IC
Updated Placements (From 9-30 to 10-2)
...