The following diagrams are taken from: http://www.analog.com/library/analogdialogue/archives/41-06/ground_bounce.html Buck DCDC Converters This is bad: This is good: Boost DCDC Converters Ground Bounce Design Tips Switcher IC’s with internal mosfets tend to aim towards higher efficiency and therefore lower mosfet on resistance.  However low on resistance means faster switching times, which contributes to noise and ground bounce. […]