Analysis of efficiency optimization for PFM mode switching DC-DC boost regulator

A mathematical analysis of efficiency optimization for PFM (pulse frequency modulation) mode boost regulator has been presented in this paper. Based on the load demand, input voltage and output voltage a PFM mode booster can operate in single pulse or multi pulse operation. The presented analysis reveals a relationship between operating efficiency and mode of operation considering the external and internal parameters for which loss occurs. This paper also presents a relationship between maximum load delivering capacity and inductor size where separate modes of operation are distinguished.