ROHM recommends a thermal pad size of at least 2.5mm x 2.5mm with multiple vias to the ground plane to ensure efficient heat dissipation. Additionally, keeping the PCB layer stack-up symmetrical and using a solid ground plane can help reduce thermal resistance.
To ensure stable operation, ROHM recommends implementing a soft-start circuit to limit the inrush current during power-up. During power-down, a gradual decrease in input voltage can help prevent voltage spikes and ensure a clean shutdown.
ROHM recommends using low-ESR capacitors with a value of 10uF to 22uF for the input capacitor and 10uF to 47uF for the output capacitor. The capacitor selection should be based on the specific application requirements and operating conditions.
ROHM recommends implementing overvoltage protection (OVP) and undervoltage protection (UVP) circuits to prevent damage to the device. The OVP circuit should be designed to trigger at a voltage above the maximum rated input voltage, while the UVP circuit should trigger at a voltage below the minimum rated input voltage.
The BD800M7WFP2-CE2 is rated for operation from -40°C to 125°C. However, ROHM recommends derating the device's power dissipation and output current at high temperatures to ensure reliable operation and prevent thermal runaway.
