Integrated Hybrid Switched Converters: A Review

Abstract

The requirements of portable devices and other applications for a compact and efficient power converter drives the integration of power converters. However, conventional switched-inductor and switched­-capacitor converters struggle with these requirements in integrated circuit dimensions. This paper introduces the state-of-the-art of a growing trend in integrated power converters, called hybrid switched converters. Here, the issues of conventional topologies are introduced, as well as the improvements addressed by hybrid converters, in terms of power efficiency, power density and voltage conversion ratio. Also, the characteristics of the four main trends in fully and highly integrated hybrid switched converters topologies are discussed.  Finally, their state-of-the-art metrics are presented and compared to the metrics of conventional integrated switched converters.