The maximum junction temperature of the AOD425 is 175°C. However, it's recommended to keep the junction temperature below 150°C for reliable operation.
To ensure proper biasing, make sure to provide a stable input voltage within the recommended range (typically 4.5V to 5.5V), and ensure the output voltage is within the specified range (typically 1.2V to 3.3V). Also, ensure the input and output capacitors are properly sized and placed close to the device.
To minimize noise and EMI, it's recommended to follow a star-grounding layout, keep the input and output traces separate, and use a solid ground plane. Also, place the input and output capacitors close to the device, and use a shielded inductor if possible.
The output voltage ripple of the AOD425 can be calculated using the following formula: ΔVout = (Iout * ESL) / (Cout * fsw), where ESL is the equivalent series inductance of the output capacitor, Cout is the output capacitance, and fsw is the switching frequency.
The recommended input capacitor value is typically 10uF to 22uF, with an X5R or X7R dielectric type. This ensures low ESR and high capacitance to filter out input voltage noise and ripple.
