A good PCB layout for the MC33078D involves keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing the length of the traces carrying high-frequency signals. It's also recommended to use a shielded inductor and to keep the switching node (SW) away from sensitive analog circuits.
The inductor value depends on the input voltage, output voltage, and switching frequency. A good starting point is to use the inductor value calculation formula provided in the datasheet. You can also use online inductor selection tools or consult with an applications engineer for guidance.
The MC33078D is rated for operation from -40°C to 150°C (junction temperature). However, the maximum ambient temperature range depends on the specific application and the thermal design of the system. It's recommended to consult with a thermal expert to determine the maximum ambient temperature range for your specific application.
Yes, the MC33078D can be used in a synchronous rectification configuration. However, this requires additional external components and careful design consideration to ensure proper operation. It's recommended to consult with an applications engineer or refer to a reference design for guidance.
To troubleshoot issues with the MC33078D, start by checking the PCB layout, component values, and soldering quality. Use an oscilloscope to measure the voltage and current waveforms at the input, output, and switching node. Consult the datasheet and application notes for guidance on troubleshooting common issues.
MC33078D datasheet
by STMicroelectronics
