A good PCB layout for the MP24893DJ-LF-Z should prioritize thermal management, with a solid ground plane and thermal vias to dissipate heat. Keep the input and output capacitors close to the IC, and use a star-ground configuration to minimize noise and EMI.
To ensure stability, choose the correct output capacitor value and type, and ensure the output voltage is within the recommended range. Also, add a small ceramic capacitor (e.g., 10nF) in parallel with the output capacitor to filter out high-frequency noise.
Although the datasheet specifies a maximum input voltage of 18V, it's recommended to limit the input voltage to 15V to ensure reliable operation and prevent damage to the device.
Use the formula: Pd = (Vin - Vout) x Iout x Efficiency. Then, calculate the junction temperature using the thermal resistance (RθJA) and the power dissipation: Tj = Ta + (RθJA x Pd).
For the input capacitor, use a low-ESR ceramic capacitor (e.g., X5R or X7R) with a value between 4.7μF to 10μF. For the output capacitor, use a low-ESR ceramic capacitor (e.g., X5R or X7R) with a value between 10μF to 22μF.
