Patent ID: 7898109

Claim:
A switching converter having n-tub bias-voltage control, comprising: a first high-side switching transistor having a first control terminal, a first output terminal, a first input terminal capable of receiving a first supply voltage, a first n-tub, and a first n-tub terminal connected to the first n-tub; a low-side rectifier connected to the output terminal of the first high-side switching transistor; a first control circuit connected to the control terminal of the first high-side switching transistor and adapted to cause the first high-side switching transistor to switch between a substantially conductive state and a substantially nonconductive state at a switching frequency; and a tub control circuit connected to the first n-tub terminal and adapted to produce a first n-tub bias voltage that is sufficient to reduce at least one parasitic current in a first parasitic element in the first switching transistor.