DC/DC converter loop response tests are common in IC development phase as well as in system development phase. Loop response reflects DC/DC converters stable performance. Tuning loop compensation parameters or external components is needed to make sure a desired performance. Using correlated simulation model and bench would significantly shorten optimization time.

This application note introduces the bench and simulation methods of measuring loop response, explains why need to do bench and simulation correlation, and provides how to extract raw data from bench and simulation results to correlate loop response for DC/DC converters both in time domain and frequency domain.