Digital hybrid V2 control for buck converters

摘要: Stabilization of a switching voltage regulator employing V2 control against ripple oscillation instability when the equivalent series resistance (ESR) an output capacitor is small provided by providing both external ramp and internal (only latter which requires approximation inductor current) in feedback path, preferably including inner outer loops. Approximation current using such arrangement non-critical may be estimated based on power input voltage. Drift circuit estimation avoided adjusting duty cycle or slew rate positive-going portion triangular waveform.