A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Keep the input and output traces short and symmetrical, and use a common-mode choke to reduce EMI.
Ensure the output capacitor is properly sized and placed close to the output pin. Use a low-ESR capacitor and add a 1-2 ohm resistor in series with the output capacitor to prevent oscillations.
The maximum input voltage is 18V, but it's recommended to keep it below 15V to ensure reliable operation and prevent overheating.
The output voltage ripple can be calculated using the formula: ΔVout = (Iout * Rl) / (f * Cout), where Iout is the output current, Rl is the load resistance, f is the switching frequency, and Cout is the output capacitance.
The thermal derating curve is not explicitly provided in the datasheet, but it's recommended to derate the output current by 1.5% per degree Celsius above 25°C to ensure reliable operation.
RC4580IPWR datasheet
by Texas Instruments
