Abstract
This article presents a modified KY (M-KY) con- verter, which provides a continuous flying capacitor charging current in discontinuous conduction mode (DCM), when com- pared with the conventional KY converter. This modification extends the load current range, improves the power efficiency, and simplifies the zero current detection (ZCD). To meet IoT application requirements, we implement a double clock timing (DCT) control combined with an adaptive sizing technique, which obtains a high efficiency over a wide load range, with a fast load transient response. To reduce the chip size and quiescent current, we also adopt a clocked-feedback resistor network (CFRN). Implemented in standard 65-nm CMOS, the proposed M-KY converter achieves a peak efficiency of 95% and a wide load Manuscript received 2 August 2022; revised 28 February 2023; accepted 27 June 2023. Date of publication 18 July 2023; date of cur- rent version 24 October 2023. This article was approved by Associate Editor Wing-Hung Ki. This work was supported in part by The Sci- ence and Technology Development Fund, Macau SAR (FDCT), under Grant 120/2016/A3, Grant SKL-AMSV(UM)-2020-2022, and Grant SKL- AMSV(UM)-2023-2025; in part by the University of Macau under Grant MYRG2022-00172-IME, Grant MYRG2020-00056-IME, Grant MYRG2018- 00020-AMSV , and Grant MYRG2020-00013-IME; in part by the National Natural Science Foundation of China (NSFC) under Grant 62174080; in part by the Shenzhen Science and Technology Innovation Commiss