ROHM provides a recommended PCB layout in their application note AN11984, 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 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 AN11984 for more details.
The maximum output current of the BD37543FS-E2 is 3A, but it's recommended to derate the output current based on the ambient temperature and PCB 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 datasheet and application notes. Additionally, make sure to decouple the input and output pins with suitable capacitors, and avoid long traces and loops that can cause oscillations.
The typical dropout voltage of the BD37543FS-E2 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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