Patent ID: 8334683

Claim:
A DC-DC voltage converter, comprising: a pair of switching transistor providing an output voltage that are alternately switched in a boost mode of operation responsive to control signals; an inductor connected with the pair of switching transistor having an inductor current flowing therethrough; a current sensor connected to monitor an input current; control circuitry for generating the control signals to the pair of switching transistors responsive to the current sense signal, the output voltage and a current limit signal, wherein when the current limit signal indicates the inductor current exceeds a current limit the control signals configure the pair of switching transistors to decrease the inductor current, wherein the control circuitry further comprises: driver circuitry for generating the control signals responsive to a PWM signal; an error amplifier for comparing the output voltage with a reference voltage and generating an error voltage responsive thereto; a PWM comparator for comparing the error voltage with a voltage signal responsive to the current sense signal; an OR gate connected to the output of the PWM comparator and the current limit signal; an inverter connected to the output of the OR gate; and a latch connected to receive an output of the inverter and a clock signal and generating the PWM signal responsive thereto.