Imagine you just designed your DC/DC converter, and it turns out it is not 100% efficient. This is not surprising and means that some heat will always be generated in the power conversion process. This heat has to be dissipated properly into the ambient because high temperatures can affect the lifetime, as well as the operation of the converter and the nearby circuits.
The PCB design and copper area is very important for a good thermal design of any DC/DC power converter but is often difficult to predict how much PCB copper area is really enough. Given the application requirements (for example, input voltage, output voltage, output current, and maximum ambient temperature), how would you estimate the minimum required board area to keep the DC/DC converter solution cool enough?
This application note from Texas Instruments provides a quick design procedure to get you started.
To learn more, click here.