Patent ID: 7876073
Filing Date: 2011-01-25
Classification: H02M

Abstract:
1. A current-mode controlled step-down switching regulator comprising: an input terminal; an output terminal; a switching device configured to switch in accordance with a control signal; an inductor configured to store charge from an input voltage at the input terminal based on the switching device; a rectifying device configured to discharge the charge stored in the inductor; an error amplifier configured to amplify a voltage difference between a divided voltage generated by dividing an output voltage at the output terminal and a predetermined reference voltage; a slope voltage generator configured to generate and output a slope voltage having a slope angle corresponding to the input voltage; and a switching controller configured to compare a voltage output from the error amplifier with the slope voltage, generate a pulse signal with a duty cycle corresponding to a comparison result, and control the switching of the switching device according to the pulse signal.