Patent ID: 8878509

Claim:
A current-mode regulator for a buck converter, the regulator comprising: a power inductor having an input and an output, and operative to deliver an output current from the power inductor output to a load; a switching network operative to selectively connect the power inductor input to an input voltage or a second voltage; and a controller operative to control the switching network, the controller comprising an inner loop control circuit comprising: the switching network; a current measuring circuit comprising a passive network connected to the power inductor input and operative to indicate a power inductor current as a measurement voltage; a slope circuit connected between the current measuring circuit and the output, the slope circuit operative to apply a time-varying voltage having a positive slope to the measurement voltage to generate a slope compensated measurement voltage; a comparator operative to compare the slope compensated measurement voltage to a control voltage; and a switching controller operative to control the switching network in response to the output of the comparator.