Recent application requirements show a trend toward higher power requirements for boost converters. These requirements often put great emphasis on cost, efficiency, size and dynamic response. With such emphasis on these performance requirements the need for using a multiphase synchronous boost converter arises. Selecting a number of phases can increase component counts and costs, which begs the question, how many phases are needed? What benefit do a given number of phases for a certain power requirement provide? This paper runs through a design example of a multiphase boost showing how interleaving affects cost, efficiency, size and performance.
