Boost Converter Generates Three Analog Rails

astandardboostconverterconsistingofIC1,C1,L1,D1,andC2generates,inadditiontothemainoutput,twoauxiliarysupplyrails(10Vand-5V)withtheadditionofsomesmallandverylow-costextracomponents.Suchrailsareusefulfortheanalogcircuitryinsmallhandheldinstruments,whichoftenrequiresupplyvoltagesinexcessofthesignalrange.Maxim>AppNotes>A/DandD/AConversion/SamplingCircuitsKeywords:boostconverter,A/D,D/Aconversion,samplingcircuitsMay13,2003APPLICATIONNOTE2026BoostConverterGeneratesThreeAnalogRailsInFigure1,astandardboostconverterconsistingofIC1,C1,L1,D1,andC2generates,inadditiontothemainoutput,twoauxiliarysupplyrails(10Vand-5V)withtheadditionofsomesmallandverylow-costextracomponents.Suchrailsareusefulfortheanalogcircuitryinsmallhandheldinstruments,whichoftenrequiresupplyvoltagesinexcessofthesignalrange.Figure1.Addingexternalchargepumpstothis5Vboostconverterproducesauxiliaryanalograilsof10Vand-5V.Themainregulatedoutputof5V±2%issustainedbyinput