應用于降壓型開關電源的LDO設計與研究.pdf

1、西安電子科技大學碩士學位論文應用于降壓型開關電源的LDO設計與研究姓名：賈寧波申請學位級別：碩士專業(yè)：軟件工程（微電子）指導教師：楊銀堂徐駿華20100101AbstractAbstractWiththerapiddevelopmentofmobilecommunicationtechnologylowpowerhighefficiencypowermanagementtechnologybecomeaninevitabletrendT

2、hepaperpresentsanewpowermanagementsolutionthatcombineaLDOlinearregulator、析t11abuckDCDCconvertor，thissolutionmakestheuseoflownoise，highstabilityLDOoutputtoprovidinghighqualitypowerforbuckDCDCconvertorWithcombinationofthea

3、bovedesignrequirements，thispaperpresentsasuitablestmctureofaLDOregulatorforswitchingpowersupplyThisstructureusestheLDOoutputtodrivethereferencesource，reducesystemnoiseandpowerconsumptionThroughsystematicanalysisofLDO，the

4、loopwillbemorestableafteradoptingappropriatecompensatorymeasuresInaccordancewithprogramneeds，thisstructuredesignsaoutputstagewhichhavetwokindsofswitchingstageTheoutputcallsupplythepowerfortheinternalcircuits，andalsoCandi

5、rectlydrivetheexternalloadsInadditionthestructureincreaseafunctionalcircuitincludingthecomparatorandlogiccontrolmodulestoensurethereferencesourceworkingperfectlyThispaperusestheBiCMOSmanufacturingprocesswhichcontainshigh

6、speedbipolardevicesandMOSdevice，thisprocessCanmakethecircuitbetterrealizedUsingthesoftwareofHspicetosimulationtheLDOsystemtheresultshowsthatthesystemCanworkperfectlytheperformanceofeachsub—modulecircuitcanmeetthedesignre

7、quirementsTherangeoftheLDOinputvoltageis3“5Vandoperatingtemperaturerangeis25125。CIntheconditionoftheinputvoltage25Vandtemperature25“C，theLDOoutputvoltageis2Bythemaximumoutputcurrentis180mA，andthedropoutvoltageis200mVThis