Murata provides a recommended PCB layout in the datasheet, but it's also recommended to follow general guidelines for DC-DC converter layout, such as keeping the input and output capacitors close to the device, and using a solid ground plane to reduce noise and EMI.
The device should be mounted on a PCB with adequate thermal conductivity, and the ambient temperature should be kept within the specified range. Additionally, ensure good airflow around the device and avoid blocking the airflow with components or enclosures.
The datasheet specifies a recommended input voltage range, but it's generally recommended to keep the input voltage deviation within ±10% of the nominal input voltage to ensure stable operation and prevent damage to the device.
While it's possible to use a different inductor value, it's not recommended as it may affect the device's performance, efficiency, and stability. The recommended inductor value is optimized for the device's operating frequency and output characteristics.
Start by checking the input voltage, output load, and PCB layout for any issues. Use an oscilloscope to monitor the output voltage and current, and check for any signs of oscillation or instability. Also, ensure the device is properly soldered and the thermal interface material is applied correctly.
