{"title":"A high-light-load-efficiency hysteresis-controlled buck converter with adaptively clocked hysteresis dynamic comparator for IoT applications","authors":"","doi":"10.1016/j.mejo.2024.106319","DOIUrl":null,"url":null,"abstract":"<div><p>A hysteresis-controlled (HC) buck converter with an adaptively clocked hysteresis dynamic comparator (ACHDC) is proposed to improve the conversion efficiency at light load. In contrast to the conventional HC buck converter, a comparator with enabled signal is applied to replace the continuously-on comparator, resulting in significantly reduced static power consumption from the comparator. Additionally, the converter employs an adaptive clock scaling circuit (ACSC) for the dynamic comparator, enabling it to achieve high conversion efficiency across a load current range of 1 μA to 20 mA, with minimal deterioration in ripple voltage. To generate the clock signal, a leakage-based oscillator with dual regulation of capacitance and current is designed. Simulation results demonstrate that the proposed buck converter achieves a peak efficiency of 94.83 % and maintains an efficiency of at least 86.47 % over the entire load range.</p></div>","PeriodicalId":49818,"journal":{"name":"Microelectronics Journal","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microelectronics Journal","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1879239124000237","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
A hysteresis-controlled (HC) buck converter with an adaptively clocked hysteresis dynamic comparator (ACHDC) is proposed to improve the conversion efficiency at light load. In contrast to the conventional HC buck converter, a comparator with enabled signal is applied to replace the continuously-on comparator, resulting in significantly reduced static power consumption from the comparator. Additionally, the converter employs an adaptive clock scaling circuit (ACSC) for the dynamic comparator, enabling it to achieve high conversion efficiency across a load current range of 1 μA to 20 mA, with minimal deterioration in ripple voltage. To generate the clock signal, a leakage-based oscillator with dual regulation of capacitance and current is designed. Simulation results demonstrate that the proposed buck converter achieves a peak efficiency of 94.83 % and maintains an efficiency of at least 86.47 % over the entire load range.
期刊介绍:
Published since 1969, the Microelectronics Journal is an international forum for the dissemination of research and applications of microelectronic systems, circuits, and emerging technologies. Papers published in the Microelectronics Journal have undergone peer review to ensure originality, relevance, and timeliness. The journal thus provides a worldwide, regular, and comprehensive update on microelectronic circuits and systems.
The Microelectronics Journal invites papers describing significant research and applications in all of the areas listed below. Comprehensive review/survey papers covering recent developments will also be considered. The Microelectronics Journal covers circuits and systems. This topic includes but is not limited to: Analog, digital, mixed, and RF circuits and related design methodologies; Logic, architectural, and system level synthesis; Testing, design for testability, built-in self-test; Area, power, and thermal analysis and design; Mixed-domain simulation and design; Embedded systems; Non-von Neumann computing and related technologies and circuits; Design and test of high complexity systems integration; SoC, NoC, SIP, and NIP design and test; 3-D integration design and analysis; Emerging device technologies and circuits, such as FinFETs, SETs, spintronics, SFQ, MTJ, etc.
Application aspects such as signal and image processing including circuits for cryptography, sensors, and actuators including sensor networks, reliability and quality issues, and economic models are also welcome.