A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Keep the input and output traces short and away from each other to minimize noise and crosstalk.
Use a thermally conductive material for the PCB, ensure good airflow, and consider using a heat sink if the device will be operating in high-temperature environments.
Use a shielded enclosure, keep the device away from antennas and other EMI sources, and ensure good grounding and shielding of cables and connectors.
Use a low-ESR capacitor on the output, ensure the PCB traces can handle the high current, and consider using a current sense resistor to monitor the output current.
Ensure good heat sinking, use a thermally conductive material for the PCB, and consider using a heat sink or fan to keep the device within its operating temperature range.