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该论文提出并实现了一种全集成三电平DC/DC转换器，结合了电感式降压和开关电容转换器的特性，面向纳米级动态电压和频率调整（DVS）应用。解决了片上多电源域中快速电压转换和高集成度的需求，通过快速分流调节实现纳秒级电压调整。
In recent years, chip multiprocessor architectures have emerged to scale performance while staying within tight power constraints. This trend motivates percore/block dynamic voltage and frequency scaling (DVFS) with fast voltage transition. Given the high cost and bulk of off-chip DC/DC converters to implement multiple on-chip power domains, there has been a surge of interest in on-chip converters. This paper presents the design and experimental results of a fully integrated 3-level DC/DC converter [1] that merges characteristics of both inductor-based buck [2-4] and switched-capacitor (SC) converters [5]. While off-chip buck converters show high conversion efficiency, their on-chip counterparts suffer from loss due to low quality inductors. With the help of flying capacitors, the 3-level converter requires smaller inductors than the buck converter, reducing loss and on-die area overhead. Compared to SC converters that need more complex structures to regulate higher than half the input
Wonyoung Kim, David M Brooks, Gu-Yeon Wei
Harvard University, Cambridge, MA