Linear-nonlinear control applied to switching power supplies to get fast transient response

This paper shows the utilization of the new linear-nonlinear control (LnL) to get a better fast transient response in switching power supplies. The linear-nonlinear control allows reducing the recovery time of the converters working under a load current step. This type of control helps designers to solve the problems presented in system such us DSPs and microprocessors. Four different prototypes have been built to show the actual operation and to compare the experimental results: a conventional buck converter with linear control, a buck converter with LnL control, a hybrid source with threshold band and a hybrid source with LnL control. The results prove that using LnL control the output voltage variation is limited, the efficiency is improved, and a better transient response is obtained.