What is the switching frequency of a MOSFET to be used for a DC-DC buck-boost converter?

The switching frequency of a MOSFET used in a DC-DC buck-boost converter typically depends on several factors, including the desired efficiency, the components used in the converter circuit, and the specific application requirements. In general, the switching frequency for a buck-boost converter is typically in the range of tens of kilohertz to several hundred kilohertz.

Higher switching frequencies can allow for smaller and lighter passive components (such as inductors and capacitors) in the converter circuit, but they can also lead to increased switching losses in the MOSFETs and other components. On the other hand, lower switching frequencies can reduce switching losses but may require larger and heavier passive components.

When designing a DC-DC buck-boost converter, it is important to consider trade-offs between switching frequency, efficiency, component size, cost, and other factors to optimize the performance of the converter for a specific application. Simulation tools and calculations can be used to determine the optimal switching frequency for a given set of design requirements.