How do we choose the switching frequency of a buck regulator generally?


Joined Mar 14, 2008
Generally it's a function of the desired efficiency of the converter, and the switching losses versus frequency.
The switching losses are determined by the design of the converter.
Determining those losses is likely easiest done with an accurate Spice simulation of the circuit.


Joined Feb 24, 2006
There is no "one size fits all" rule. As mentioned it does depend on your actual requirements and your ability to analyze and evaluate different choices. It may depend on factors that we are not even aware of which makes it difficult to address unless you have a more definitive set of requirements.


Joined Mar 30, 2015
Welcome to AAC!

Frequency determination depends on a number of factors. One of them should be to keep the frequency above the audible range for people (minimally).