凌力尔特模拟创新杂志 (OCTOBER 2011)

Thecontinuousmarchinelectronicstowardlowersupplyvoltages

andhigherloadcurrentsputstremendouspressureonpoint-ofloadDC/DCconverterstomaintainafastpaceofperformance

improvements.Forinstance,alowersupplyvoltagemeansa

regulatormustsupportahigherstep-downratiofroma12V

or24Vpowerrailwhilemaintaininghighefficiency.Regulation

accuracyalsobecomesmoreimportantassupplyvoltages

drop—andaccuracymustbemaintainedinthe

presenceofparasiticIRdropsanddynamicload

transients.EMIgeneratedbyswitchingconverters

isalsoofconcern,especiallyinRFapplications.October2011Volume21Number3INTHISISSUE2-channeland4-channelFast,AccurateStep-DownDC/DCControllerConverts24VDirectlytopin-selectableI2Cmultiplexer11highefficiencypowersupplyforIntelIMVP-1.8Vat2MHz6/6+/6.5CPUs20BudAbesingha3AlinearregulatoreasilyThecontinuousmarchinelectronicstowardlowersupplyvoltagesparalleledtospreadpowerandhigherloadcurrentsputstremendouspressureonpoint-of-andheat24