1、、洳；≥碩士學位論文⑧論文題目直筮至!i醫(yī)弛整亙翌蟲生氈墊墨芷丘退讓要塞現(xiàn)作者姓名———王—萱————一指導教師——』韭鹺已————一學科(專業(yè))——墮監(jiān)生盈葒———一所在學院——』韭塑翌碧鯉L——一提交日期—上螋王業(yè)業(yè)邑一浙江大學碩士學位論文高效率，低功耗直流電壓轉換器芯片設計與實現(xiàn)AbstractDC—DCconvertcriswidelyadoptedwiththegrowingusageofportableapplication

2、sSincethese。applicationsareusuallypoweredbyenergylimitcdsinglecellbatteryhowtoimprovetheefficiencyandpowerconsumptiontoprolongthebatterylifeistheprimaryconsiderationinDCDCconverterdbsi印sAdesignmethodofahighefficiencylowp

3、owerswitchingpowerDCDCc∞verterwithpulsewidthmodulation0“WM)andpulseff羽uencymodulation(PFM)modesispresentedTheconverteroperatesinvoltagecontrolbasedPWMmodeataswitchingfrequencyof1MHzwhentheloadcurrentisIargd60mA)andinduct

4、orcurrentcontinuous，andwo出inpoakeunmltandhystereticcontrolbasedPFIVlmodewithareducedswitchingfrequencyoflessthan05MHziftheloedcurrentissmall(60mA)andinductorcltrrentdiscontinuoUS，ensurmghighlyefficientoperationwithinalar

5、gerange(眥50mA)ofloadcurrentvariationAstheoutputvoltagereaches102％ofdleant／cipatcdoutputvaluetheconverterenterssleepmodeduringwhichthequiescentcurrentdccTgasc$ThechipwasimplementedusingCSMC05岫CMOSmixedsignalprocessSimulat

6、ionandtestingresultsindicatethaltheconverterqⅫ鋤∞inPWM／PFMmod％andperformsseamlessswitchingbetweenthemdisplayinggoodload／lineregulationTheoutputvoltageerrorislessthan29≈themaximumquiescentcurrentlessm趾15IJAmadthemaximumofe

7、fficiency印to92麟Chapter1dba∞㈣switchingpowerDCDCprinciplesanticontrolsn組e#escl塒er2describosthesystemstructure，operatingmodesandperformanceoftheproposedconvertcrChapter3introducesthedesignmethodofsomemaincircuitblockscimpte