Used for: Stepping a voltage up or down ie lower or higher than the input with the same polarity


  • Steps input up to any value or down towards zero
  • Simple circuit
  • Easy Low-side gate drive for main switch
  • Inherently short circuit proof becasue of series capacitor


  • High output ripple - can be > output DC current so need large low ESR output caps
  • Requires two inductors
  • Requires high quality series capacitor
  • Complex to stabilise