ROHM provides a recommended PCB layout in the application note AN1191, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure reliable operation.
The input capacitor selection depends on the input voltage, output current, and ripple current requirements. ROHM recommends using a low-ESR capacitor with a minimum capacitance of 10uF and a voltage rating of at least 1.5 times the input voltage. Refer to the application note AN1191 for more details.
The maximum output current of the BD90525EFJ-CE2 is 2A, but it's recommended to derate the output current based on the ambient temperature and thermal design. Refer to the thermal derating curve in the datasheet to determine the maximum safe output current for your specific application.
To ensure stability, follow the recommended component values and PCB layout guidelines in the application note AN1191. Additionally, make sure to use a sufficient output capacitor with a low ESR and a minimum capacitance of 10uF. Avoid using ceramic capacitors with high ESL, as they can cause oscillation.
The typical dropout voltage of the BD90525EFJ-CE2 is around 0.5V, but it can vary depending on the output current and input voltage. Refer to the datasheet for the dropout voltage vs. output current characteristic curve.
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