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Emerging ultra-low power applications such as wireless sensor nodes and implantable biomedical devices employ sophisticated energy harvesting techniques to extract power from the ambient environment. However, the power extracted can fluctuate considerably based on the intensity and availability of the power sources. Thus, modern self-powered devices require low power and efficient power converters to regulate the harvested energy appropriately, in order to effectively extend their operating lifetime. Reconfigurable switched-capacitor (SC) DC–DC power converters are tailored to power these applications, due to advantages such as monolithic implementation, low power and low cost operation. Advanced reconfigurable charge pumps can optimize their operating structure ‘on-the-fly’ to provide various conversion gains. This can optimize the efficiency and provide a large dynamic range of output voltages. Moreover, interleaved charge pump topologies can minimize the output voltage ripples, enhance the load regulation and improve the robustness of self-powered devices. Hence, sophisticated modeling techniques, control algorithms, circuit design principles are urgently required to enable the development of state-of-the-art SC power converters, thereby advancing the growth of self-powered devices.
Fundamental Concepts
Power Semiconductor Devices
Fundamental Charge Pump Topologies and Design Principles
Power Loss in Switched-Capacitor Power Converters: Causes and Analysis
Reconfigurable Switched-Capacitor Power Converters
Configuring Switched-Capacitor Power Converters Using Interleaving Regulation Techniques
Switched-Capacitor Power Converter Design and Modeling in z-Domain