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1®FN9289.1ISL6312Four-PhaseBuckPWMControllerwithIntegratedMOSFETDriversforIntelVR10,VR11,andAMDApplicationsTheISL6312four-phasePWMcontrolICprovidesaprecisionvoltageregulationsystemforadvancedmicroprocessors.TheintegrationofpowerMOSFETdriversintothecontrollerICmarksadeparturefromtheseparatePWMcontrolleranddriverconfigurationofpreviousmultiphaseproductfamilies.Byreducingthenumberofexternalparts,thisintegrationisoptimizedforacostandspacesavingpowermanagementsolution.OneoutstandingfeatureofthiscontrollerICisitsmulti-processorcompatibility,allowingittoworkwithbothIntelandAMDmicroprocessors.IncludedareprogrammableVIDcodesforIntelVR10,VR11,aswellasAMDDACtables.Aunitygain,differentialamplifierisprovidedforremotevoltagesensing,compensatingforanypotentialdifferencebetweenremoteandlocalgrounds.Theoutputvoltagecanalsobepositivelyornegativelyoffsetthroughtheuseofasingleexternalresistor.TheISL6312alsoincludesadvancedcontrolloopfeaturesforoptimaltransientresponsetoloadapplyandremoval.Oneofthesefeaturesishighlyaccurate,fullydifferential,continuousDCRcurrentsensingforloadlineprogrammingandchannelcurrentbalance.ActivePulsePositioning(APP)modulationisanotheruniquefeature,allowingforquickerinitialresponsetohighdi/dtloadtransients.ThiscontrolleralsoallowstheusertheflexibilitytochoosebetweenPHASEdetectorLGATEdetectadaptivedeadtimeschemes.ThisabilityallowstheISL6312tobeusedinamultitudeofapplicationswhereeitherschemeisrequired.ProtectionfeaturesofthiscontrollerICincludeasetofsophisticatedovervoltage,undervoltage,andovercurrentprotection.Furthermore,theISL6312includesprotectionagainstanopencircuitontheremotesensinginputs.Combined,thesefeaturesprovideadvancedprotectionforthemicroprocessorandpowersystem.Features•IntegratedMultiphasePowerConversion-2or3-PhaseOperationwithInternalDrivers-4-PhaseOperationwithExternalPWMDriverSignal•PrecisionCoreVoltageRegulation-DifferentialRemoteVoltageSensing-±0.5%SystemAccuracyOverTemperature-AdjustableReference-VoltageOffset•OptimalTransientResponse-ActivePulsePositioning(APP)Modulation-AdaptivePhaseAlignment(APA)•FullyDifferential,ContinuousDCRCurrentSensing-AccurateLoadLineProgramming-PrecisionChannelCurrentBalancing•UserSelectableAdaptiveDeadTimeScheme-PHASEDetectorLGATEDetectforApplicationFlexibility•VariableGateDriveBias:5Vto12V•Multi-ProcessorCompatible-IntelVR10andVR11ModesofOperation-AMDModeofOperation•MicroprocessorVoltageIdentificationInputs-8-bitDAC-SelectablebetweenIntel’sExtendedVR10,VR11,AMD5-bit,andAMD6-bitDACTables-DynamicVIDTechnology•OvercurrentProtection•Multi-TieredOvervoltageProtection•DigitalSoft-Start•SelectableOperationFrequencyupto1.5MHzPerPhase•Pb-FreePlusAnnealAvailable(RoHSCompliant)OrderingInformationPARTNUMBER*(Note)PARTMARKINGTEMP.(°C)PACKAGE(Pb-Free)PKG.DWG.#ISL6312CRZISL6312CRZ0to+7048Ld7x7QFNL48.7x7ISL6312IRZISL6312IRZ-40to+8548Ld7x7QFNL48.7x7NOTE:IntersilPb-freeplusannealproductsemployspecialPb-freematerialsets;moldingcompounds/dieattachmaterialsand100%mattetinplateterminationfinish,whichareRoHScompliantandcompatiblewithbothSnPbandPb-freesolderingoperations.IntersilPb-freeproductsareMSLclassifiedatPb-freepeakreflowtemperaturesthatmeetorexceedthePb-freerequirementsofIPC/JEDECJSTD-020.*Add“-T”suffixfortapeandreel.DataSheetCAUTION:Thesedevicesaresensitivetoelectrostaticdischarge;followproperICHandlingProcedures.1-888-INTERSILor1-888-468-3774|Intersil(anddesign)isaregisteredtrademarkofIntersilAmericasInc.CopyrightIntersilAmericasInc.2006.AllRightsReservedAllothertrademarksmentionedarethepropertyoftheirrespectiveowners.August21,20062FN9289.1August21,2006PinoutISL6312(48LDQFN)TOPVIEWISL6312IntegratedDriverBlockDiagramVID4VID6VID7FSISEN3-PVCC3VID5ISEN3+LGATE3BOOT3UGATE3VID3VID2VID1VID0VRSELDRSELOVPSELSSVCC14823456789103635343332313029282747464544434241403913141516171819202122ENISEN1+ISEN1-PHASE1UGATE1BOOT1LGATE1PVCC1_2LGATE2BOOT2COMPFBIDROOPVDIFFRGNDVSENISEN2+ISEN2-ISEN4+ISEN4-49GND2324EN_PH4PWM4REFOFS1112PHASE3PGOOD38372625UGATE2PHASE2THROUGHSHOOT-PROTECTIONBOOTUGATEPHASELGATELOGICCONTROLGATEPVCC10kΩPWMSOFT-STARTANDFAULTLOGICDRSEL20kΩISL6312ISL63123FN9289.1August21,2006BlockDiagramDRIVERVRSELDYNAMICVIDD/AVID7VID6VID5VID4VID3VID2E/AREFFBOFFSETOFSCOMPRGNDVSENVDIFFISEN3-ISEN3+ISEN4-∑1N∑PWM1∑∑BOOT1UGATE1PHASE1LGATE1PVCC1_2BOOT2UGATE2PHASE2LGATE2BOOT3UGATE3PHASE3LGATE3PVCC3CLOCKANDGENERATORMODULATORSOFT-STARTANDFAULTLOGICCHANNELDETECTVCCRESETPOWER-ON0.85VENFSPGOODGND0.2Vx1ISEN4+∑VID1VID0EN_PH4PH4POR/PWM4CH1CURRENTSENSECHANNELCURRENTBALANCEOVERVOLTAGEDETECTIONLOGICUNDERVOLTAGEDETECTIONLOGICPWM2PWM3PWM4MODE/DACSELECTISEN1-ISEN1+ISEN2-ISEN2+CH2CURRENTSENSECH3CURRENTSENSECH4CURRENTSENSEI_AVGMOSFETDRIVERMOSFETDRIVERMOSFETLOADAPPLYTRANSIENTENHANCEMENTPWM4SIGNALLOGICOCI_TRIPI_AVGOVPSELIDROOPOPENSENSELINEDETECTSSDRSELDETECTWAVEFORMISL6312ISL63124FN9289.1August21,2006TypicalApplication-ISL6312(4-Phase)VID4VID5PGOODVID3VID2VID1VCCISL6312VID0FSOFSREFEN_PH4PWM4LOADVRSELEN+12VGND+12VPWMVCCBOOTUGATEPHASEPVCCLGATEGNDISL6612+12VVID6VID7SS+5VISEN4-ISEN4+ISEN3-ISEN3+ISEN2-ISEN2+ISEN1-ISEN1+OVP