Patent ID: 6031702
Filing Date: 2000-02-29
Classification: H02H,H02M,Y02B

Abstract:
A DC--DC converter comprising:an inductor and a MOSFET switch connected in series between a supply voltage and ground; anda disconnect MOSFET connected to a common node between said inductor and said MOSFET switch, said disconnect MOSFET comprising:a first parasitic diode between a body and a first terminal of said disconnect MOSFET anda second parasitic diode between said body and a second terminal of said disconnect MOSFET;a first switch connected in parallel with said first parasitic diode; andan overcurrent sensing circuit coupled to a current path through said disconnect MOSFET and responsive to an excessive current through said disconnect MOSFET, said first switch being opened in response to an output signal from said overcurrent sensing circuit.