Current-mode control switching regulator for e.g. cellular phone, has slope compensation unit outputting slope compensation signal with compensation slope proportional to falling slope of current signal

摘要

The regulator has an inductor (L0) coupled to a load. A pulse width modulation (PWM) unit generates a PWM driving signal to control an output stage, such that the inductor delivers an inductor current signal (IL) to the load. A slope compensation unit outputs a slope compensation signal with a compensation slope proportional to a falling slope of the inductor current signal to the PWM unit according to the inductor current signal. The slope compensation unit detects a rising slope of the inductor current signal. An independent claim is also included for a slope compensation method for a switching regulator.