An Overview of Fully Integrated Switching Power Converters Based on Switched-Capacitor versus Inductive Approach and Their Advanced Control Aspects

Abstract

This paper reviews and discusses the state of the art of integrated switched-capacitor and integrated inductive power converters and provides a perspective on progress towards the realization of efficient and fully integrated DC–DC power conversion. A comparative assessment has been presented to review the salient features in the utilization of transistor technology between the switched-capacitor and switched inductor converter-based approaches. First, applications that drive the need for integrated switching power converters are introduced, and further implementation issues to be addressed also are discussed. Second, different control and modulation strategies applied to integrated switched-capacitor (voltage conversion ratio control, duty cycle control, switching frequency modulation, Ron modulation, and series low drop out) and inductive converters (pulse width modulation and pulse frequency modulation) are then discussed. Finally, a complete set of integrated power converters are related in terms of their conditions and operation metrics, thereby allowing a categorization to provide the suitability of converter technologies.

Design and Implementation of Hybrid DC-DC Converter: A Review

“…Typically, a low-dropout (LDO) regulator is widely used as a point-of-load regulator due to fast transient response and excellent noise rejection with compact area implementation at the cost of low efficiency, especially when the VCR is low [6]. Meanwhile, switching regulators exploit energy storing devices such as capacitors, inductors, or transformers to store the input source periodically and transfer the desired voltage level to the output based on the design specification.…”

Current Research on Embedded DC/DC Converters

“…Finally, the following two general issues in DC/DC converters can conclude this short editorial: they are the comparison between switching capacitors and inductor-based topologies (fully depicted in [7]), and the stability issue, which is very important, especially considering advanced and complex architectures [8].…”