Patent ID: 7605573
Filing Date: 2009-10-20
Classification: H02M

Abstract:
1. A switching regulator of a current-mode control type converting an input voltage input to an input terminal into a voltage proportional to a set reference voltage and outputting the voltage from an output terminal, the switching regulator comprising: a switching element configured to perform switching in accordance with a control signal input to a control electrode of the switching element so as to perform output control of the input voltage; a smoothing circuit configured to smooth an output voltage of the switching element and output the smoothed output voltage to the output terminal; a voltage divider circuit configured to divide the voltage at the output terminal with a predetermined ratio; an error amplifier circuit configured to amplify a voltage difference between the reference voltage and an output divided voltage of the voltage divider circuit; a slope voltage generator circuit configured to generate a slope voltage according to the reference voltage, correct an inclination of a slope of the slope voltage in accordance with a voltage difference between the input voltage and the voltage at the output terminal, detect a current flowing through the switching element and generate a voltage according to the detected current, and add up and output the generated voltage and the corrected slope voltage; a pulse generator circuit configured to generate and output a pulse signal having time width according to an output voltage of the error amplifier circuit and the output voltage of the slope voltage generator circuit; and a switching controller circuit configured to control the switching of the switching element in accordance with the output pulse signal of the pulse generator circuit.