节能是低电源电压和便携式电子系统的共同点。派拉蒙需要电池和便携式电子产品中——节省电源——也是从5V到3.3v（和更低）的供应rails的最大益处。即便如此，多数3.3v设计，以及，业界都还没有提供完整的选择的3.3v的设计师包括5VICs功能。之前，很多便携式产品必须运作上的3.3v和5V混合ICs。
Maxim>AppNotes>BATTERYMANAGEMENTPOWER-SUPPLYCIRCUITSKeywords:PowerConservationin3V/5VDual-SupplySystemsFeb06,2001APPLICATIONNOTE662PowerConservationin3V/5VDual-SupplySystemsPowersavingisthecommondenominatorforlowersupplyvoltageandportableelectronicsystems.Theparamountneedinbattery-poweredandportableelectronics―savingpower―isalsothemajorbenefitinmovingfrom5Vto3.3V(andlower)supplyrails.Evenso,most3.3Vdesignsinclude5VICsaswell,astheindustryhasnotyetprovideddesignerswithacompleteselectionof3.3Vfunctions.Untilitdoes,manyportableproductsmustoperateonamixtureof5Vand3.3VICs.Asexplainedinthediscussionthatfollows,adesignerwithadequa
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