标签: compensateldo

compensateLDOAUSER’SGUIDETOCOMPENSATINGLOW-DROPOUTREGULATORSChesterSimpsonNationalSemiconductor2900SemiconductorDriveM/SD2740SantaClara,Ca.95052-8090(408)721-7501TheexplosiveproliferationofbatterypoweredequipmentinthepastdecadehasacceleratedthedevelopmentandusageofLow-Dropoutvoltageregulators(sometimesreferredtoasPNPvoltageregulators).ComparedtothestandardNPNregulator,theLow-DropoutRegulator(LDO)canholditsoutputvoltageinregulationwithmuchlessvoltageacrossit:theNPNrequiresabout2Vof“headroom”toregulate,whiletheLDOwilltypicallyworkwithlessthan500mVofinput-to-outputvoltagedifferential.ThereducedinputvoltagerequirementofanLDOisadvantageousinbatterypoweredsystems,sinceittranslatesdirectlyintof……