Patent ID: 7977926
Filing Date: 2011-07-12
Classification: H02M

Abstract:
1. A DC/DC voltage converter comprising: an inductor and a low-side switch connected in a series conduction path between first and second supply voltages, the inductor being coupled to the first supply voltage and the low-side switch being coupled to the second supply voltage, a V an energy transfer switch connected between the V a freewheeling switch connected in parallel with the inductor, the freewheeling switch comprising a freewheeling MOSFET and a body bias generator, the body bias generator being coupled to each of first and second conduction terminals and a body of the freewheeling MOSFET, the body bias generator being adapted to short the body to one of the first and second conduction terminals of the freewheeling MOSFET responsive to a relationship between voltages present at the first and second conduction terminals, respectively, of the freewheeling MOSFET so as to prevent any P-N junction in the freewheeling MOSFET from becoming forward-biased.