Patent ID: 7254000

Claim:
An over voltage protection circuit in a buck converter, comprising: at least one switching section in said buck converter, each said section having a high side switch and a low side switch regulating an output voltage of said buck converter, said over voltage protection circuit comprising: a voltage sensing network electrically coupled to said output voltage; a comparator having a first input electrically coupled to said voltage sensing network, and a second input electrically coupled to a reference voltage and wherein a comparator output is electrically coupled to said low side switch; and a latch having a latching input electrically coupled to said comparator output and a latching output electrically coupled to said high side switch, wherein said low side switch is coupled to said comparator output without said latch; and wherein said over voltage protection circuit controls said low side switch and said high side switch to protect a load during an over voltage condition, such that during said over voltage condition said low side switch follows said comparator output.