The printed-circuit-board (PCB) layout is an
important step to maintain the high performance of the device. See Section 11.2 for the
recommended PCB layout.
- The input/output capacitors
and the inductor should be placed as close as possible to the IC. This keeps
the power traces short. Routing these power traces direct and wide results
in low trace resistance and low parasitic inductance.
- The low side of the input and
output capacitors must be connected properly to the GND pin to avoid a
ground potential shift.
- The sense traces connected to
FB is a signal trace. Special care should be taken to avoid noise being
induced. Keep these traces away from SW nodes. The connection of the output
voltage trace for the FB resistors should be made at the output
- Refer to Section 11.2
for an example of component placement, routing and thermal design.