LM5122-Q1 Wide-Input Sync Boost Controller With …

1 VCCLM5122 CSPSYNCIN/RTRESSSUVLOVINSYNCOUTAGNDBSTMO DEPGNDSLOPECOMPFBHOLOSW+OPTVOUTCSNVINC opyright 2017, texas instruments Incorporated ProductFolderOrderNowTechnicalDocumentsT ools &SoftwareSupport &CommunityReferenceDesignAn IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand JUNE2017LM5122-Q1 Wide-InputSynchronousBoostControllerWith MultiplePhaseCapability11 Features1 AEC-Q100 Qualifiedwith the followingresults: DeviceTemperatureGrade1: 40 C to+125 C AmbientOperatingTemperature DeviceHBMESDC lassificationLevel2 DeviceCDMESDC lassificationLevelC6 MaximumInputVoltage:65 V MinimumInputVoltage:3 V ( V for Start-Up) OutputVoltageup to 100 V Bypass(VOUT= VIN) Operation 1% Accuracy Free-Runand SynchronizableSwitchingto 1 MHz Peak-Current-ModeControl Robust3-A IntegratedGateDrivers AdaptiveDead-TimeControl OptionalDiode-EmulationMode ProgrammableCycle-by-CycleCurrentLimit Hiccup-ModeOverloadProtection ProgrammableLine UVLO ProgrammableSoft Start ThermalShutdownProtection Low ShutdownQuiescentCurrent.

2 9 A ProgrammableSlopeCompensation ProgrammableSkip-CycleModeReducesStandby Power AllowsExternalVCCS upply InductorDCRC urrentSensingCapability Multi-phaseCapability ThermallyEnhanced20-PinHTSSOP Createa CustomDesignUsingthe LM5122 Withthe WEBENCH PowerDesigner2 Applications 12-V,24-V,and 48-VPowerSystems AutomotiveStart-Stop AudioPowerSupply High-CurrentBoostPowerSupply3 DescriptionThe LM5122is a controlmethodis ,cycle-by-cyclecurrentlimiting,and easeofloop programmableup to1 achievedby two user-selectablediode-emulationmodealsoen ablesdiscontinuous-modeoperationforimpro vedefficiencyat light load internalchargepumpallows100%dutycyclefor high-sidesynchronousswitch(bypassoperati on).A180 ,frequencysynchronization,hiccup-modecur rentlimit, (1)PARTNUMBERPACKAGEBODYSIZE(NOM)LM5122- Q1 HTSSOP(20) (1) For all availablepackages,see the orderableaddendumatthe end of the : LM5122-Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedTableof Contents1 Pin Configurationand Applicationand Deviceand Mechanical,Packaging,and RevisionHistoryNOTE:Pagenumbersfor previousrevisionsmay differfrompagenumbersin the , 2017to June9, 2017 Page Splitout LM5122-Q1fromthe combineddatasheetSNVS954commercialand documentSNVSAW9detailsthe Addedlinksfor AddedNegativeto JUNE2017 ProductFolderLinks: LM5122-Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporated5 Pin Configurationand FunctionsPWPP ackage20-PinHTSSOPWithExposedPadTop View4LM5122-Q1 SNVSAW9.

3 LM5122-Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedPin the internalvoltagereferenceand the cathodeof the externalbootstrapdiodeand to the bootstrapcapacitorsuppliescurrentto chargethe high-sideN-channelMOSFET gateand shouldbe placedas closeto controlleras internalBSTchargepumpwill supply200- A currentinto bootstrapcapacitorfor the loop compensationnetworkshouldbe connectedbetweenthis pin and the FB the negative-sideof the the positive-sideof the the resistordividerfromthe outputto this pinsets the regulationthresholdat the FB pin is V. The controllerisconfiguredas slavemodeif the FB pin voltageis V at the gateof the high-sidesynchronousN-channelMOSFET switchthrougha short,low the gateof the low-sideN-channelMOSFET switchthrougha short,low 700-k pullupand 100-k pulldownresistorinternalhold MODEpin as a addingexternalpullupor pulldownresistor,MODEpin voltagecan voltageis V diodeemulationmodethreshold,forcedPWMmod eis enabled,allowingcurrentto flow in eitherdirectionthroughthe voltageis less V, the controllerworksin activatedas a MODEpin is grounded,the controllerstilloperatesin diodeemulationmode,but the skip cyclecomparatorwill not be triggeredin normaloperation.

4 This enablespulseskippingoperationat light This pin also enables/ OPTpin shouldnot be left for thesourceterminalof the restarttimerpin for an externalcapacitorthat configureshiccupmodeoff-timeand restartdelayduringoverload the AGND whenhiccupmodeoperationis programmedby a singleresistorbetweenSLOPEand the An externalcapacitorand an internal10- A currentsourceset the ramprate of the the the bootstrapcapacitor,the sourceterminalof thehigh-sideN-channelMOSFET switchand the drainterminalof the low-sideN-channelMOSFET switchthroughshort,low internaloscillatorfrequencyis programmedby a singleresistorbetweenRT and the be synchronizedto an externalclockby applyinga positivepulsesignalinto thisSYNCINpin. The recommendedmaximuminternaloscillatorfreq uencyin masterconfigurationis 2 MHzwhichleadsto 1 SYNCOUT provides180 shiftedclockoutputfor an can be left floatingwhenit is not If the UVLOpin is V, the regulatoris in theshutdownmodewith all the UVLOpin voltageis V and , the regulatoris in standbymodewith the VCCregulatoroperationaland no switchingat the HO andLO the UVLOpin voltageis V, the 10- A currentsourceat UVLOpin is V and flowsthroughthe externalUVLO resistorsto UVLOpin shouldnot be left supplypin.

5 Locallydecoupleto PGND usinga low ESR/ESLcapacitorlocatedas closeaspossibleto the the inputcapacitorand sourcepowersupplyconnectionwith short,low of the solderedto the largegroundplaneto JUNE2017 ProductFolderLinks: LM5122-Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporated(1)Stre ssesbeyondthoselistedunderAbsoluteMaximu mRatingsmay causepermanentdamageto the stressratingsonly and functionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditionsare not absolute-maximum-ratedconditionsfor extendedperiodsmay ,all voltagesare referencedto AGNDpin.(2)SeeApplicationand Implementationwheninputsupplyvoltageis less thanthe VCCvoltage.(3)All outputpins are not specifiedto havean (unlessotherwisenoted)(1)MINMAXUNITI nputVIN,CSP,CSN SW, FB, MODE,UVLO,OPT,VCC(2) 5105 VBST , SLOPE,SYNCIN/RT CSN,PGND (3)HO to SW SW + + ,RES,SYNCOUT 40150 CStoragetemperature,Tstg 55150 C(1)AECQ100-002indicatesHBMstressingis donein accordancewith the ANSI/ : LM5122-Q1 VALUEUNITV(ESD)ElectrostaticdischargeHum anbodymodel(HBM),per AECQ100-002(1) 2000 VChargeddevicemodel(CDM),per AECQ100-011 Cornerpins (1, 10, 11, and 20) 1000 Otherpins 10006LM5122-Q1 SNVSAW9 : LM5122-Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporated(1)Reco mmendedOperatingConditionsare conditionsunderwhichoperationof the deviceis intendedto be functional,but do not ensurespecificperformancelimits.

6 (2)MinimumVIN operatingvoltageis V. The minimuminputpowersupplyvoltagecan be 3 V afterstart-up,assumingVINvoltageis suppliedfroman (unlessotherwisenoted)(1)MINMAXUNITI nputsupplyvoltage(2) voltageVCC14 VHigh-sidedriverbias voltageBSTto (2)CSP,CSN365 VSwitchnodevoltageSW100 VJunctiontemperature,TJ 40125 C(1)For moreinformationabouttraditionaland new thermalmetrics,see theSemiconductorand IC (1) LM5122-Q1 UNITPWP20 PINSR JAJunction-to-ambientthermalresistance36 C/WR JC(top)Junction-to-case(top) C/WR C/W C/W C/WR JC(bot)Junction-to-case(bottom) ,thesespecificationsapplyfor 40 C TJ +125 C, VVIN= 12 V, VVCC= V, RT= 20 k , noload on LO and HO. Typicalvaluesrepresentthe mostlikelyparametricnormat TJ= 25 C and are providedfor SUPPLYISHUTDOWNVIN shutdowncurrentVUVLO= 0 V917 AIBIASVIN operatingcurrent(excludethecurrentinto RT resistor)VUVLO= 2 V, non-switching45mAVCCREGULATORVCC(REG)VCC regulationNo (VINto VCC)VVIN= V, no V, IVCC= 25 0 V5062mAIVCCVCC operatingcurrent(excludethe currentinto RT resistor)VVCC= 12 ,VVIN= ,VVIN= V71013 JUNE2017 ProductFolderLinks: LM5122-Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedElectri calCharacteristics(continued)Unlessother wisespecified,thesespecificationsapplyfo r 40 C TJ +125 C, VVIN= 12 V, VVCC= V, RT= 20 k , noload on LO and HO.

7 Typicalvaluesrepresentthe mostlikelyparametricnormat TJ= 25 C and are providedfor cyclethresholdCOMP rising,measuredat ,measuredat COMP40mVERRORAMPLIFIERVREFFB referencevoltageMeasuredat FB, VFB= inputbias currentVFB= VREF5nAVOHCOMP outputhigh voltageISOURCE= 2 mA, VVCC= 2 mA, VVCC= 12 voltageISINK= 2 gain80dBfBWUnitygain bandwidth3 MHzSlavemodethresholdFB 20 k 400450500kHzfSW2 Switchingfrequency2RT= 10 k 775875975kHzRT syncrisingthresholdRT syncfallingthresholdRT 1 1 20 k , fSW= 100 kHz,50%dutycycle,TJ= 40 C to 125 20 k , fSW= 100 kHz,50%dutycycle,TJ= 25 currentsourceVSS= 0 ASS dischargeswitchRDS-ON13 PWMCOMPARATORtLO-OFFF orcedLO off-timeVVCC= V330400nsVVCC= V560750nstON-MINM inimumLO on-timeRSLOPE= 20 k 150nsRSLOPE= 200 k 300nsCOMPto PWMvoltagedropTJ= 40 C to 125 25 : LM5122-Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedElectri calCharacteristics(continued)Unlessother wisespecified,thesespecificationsapplyfo r 40 C TJ +125 C, VVIN= 12 V, VVCC= V, RT= 20 k , noload on LO and HO.

8 Typicalvaluesrepresentthe mostlikelyparametricnormat TJ= 25 C and are providedfor CYCLE-BY-CYCLECURRENTLIMITVCS-TH1 Cycle-by-cyclecurrentlimitthresholdCSPto CSN,TJ= 40 C to 125 CSN,TJ= 25 C677586mVVCS-ZCDZ erocrossdetectionthresholdCSPto CSN,rising7mVCSPto CSN, current12 AICSNCSN inputbias current11 ABiascurrentmatchingICSP ICSN ACS to LO delayCurrentsense/ currentlimit ,VVIN= VVCC= ,VVIN= VVCC= AIRES-SINK1 REScurrentsink1 Normal-statedischargingcurrent5 AIRES-SOURCE2 REScurrentsource2 Hiccup-modeoff-timechargingcurrent10 AIRES-SINK2 REScurrentsink2 Hiccup-modeoff-timedischargingcurrent5 AHiccupcycle8 CyclesRESdischargeswitchRDS-ON40 Ratioof hiccupmodeoff-timetorestartdelaytime122H O GATEDRIVERVOHHHO high-statevoltagedropIHO= 100 mA, VOHH= VBST low-statevoltagedropIHO= 100 mA, VOLH= VHO rise time (10%to 90%)CLOAD= 4700pF, VBST= 12 V25nsHO fall time (90%to 10%)CLOAD= 4700pF, VBST= 12 V20nsIOHHPeakHO sourcecurrentVHO= 0 V, VSW= 0 V, VBST= 0 V, VSW= 0 V, VBST= sink currentVHO= VBST= VBST= VSW= 9.

9 V , VBST- VSW= 5 V100200 ABST chargepumpregulationBSTto SW, IBST= 70 A,VVIN= VSW= 9 SW, IBST= 70 A,VVIN= VSW= 12 SW bias currentVBST VSW= 12 V, VSW= 0 V3045 JUNE2017 ProductFolderLinks: LM5122-Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedElectri calCharacteristics(continued)Unlessother wisespecified,thesespecificationsapplyfo r 40 C TJ +125 C, VVIN= 12 V, VVCC= V, RT= 20 k , noload on LO and HO. Typicalvaluesrepresentthe mostlikelyparametricnormat TJ= 25 C and are providedfor GATEDRIVERVOHLLO high-statevoltagedropILO= 100 mA, VOHL= VVCC low-statevoltagedropILO= 100 mA, VOLL= rise time (10%to 90%)CLOAD= 4700pF25nsLO fall time (90%to 10%)CLOAD= 4700pF20nsIOHLPeakLO sourcecurrentVLO= 0 V, VVCC= 0 V2 AIOLLPeakLO sink currentVLO= VVCC= fall to HO rise delayNo load,50%to 50%5080115nstDHLHO fall to LO rise delayNo load,50%to 50%6080105nsTHERMALTSDT hermalshutdownTemperaturerising165 CThermalshutdownhysteresis25 C05101520-50-250255075100125150 ISHUTDOWN [PA] Temperature [ C] C001 [ns] VSW [V] C001 VVIN = 12V VVCC = CLOAD=2600pF 1V to 1V tDLH tDHL [ns] VVCC [V] C001 VVIN = 12V VSW = 12V CLOAD=2600pF 1V to 1V tDLH tDHL 50556065707580859095100-50-2502550751001 25150 Dead-time [ns] Temperature [ C] C001 tDHL tDLH PEAK CURRENT [A] VBST - VSW [V] C001 VVIN = 12V VSW = 0V SOURCE SINK PEAK CURRENT [A] VVCC [V] C001 VVIN = 12V SOURCE SINK 10LM5122-Q1 SNVSAW9 : LM5122-Q1 SubmitDocumentationFeedbackCopyright 2017, HO PeakCurrentvs VBST- VSWF igure2.

10 LO PeakCurrentvs VVCCF igure3. DeadTimevs VVCCF igure4. DeadTimevs TemperatureFigure5. DeadTimevs VSWF igure6. ISHUTDOWNvs [V] VSW [V] C001 IBST = -70uA 100120140160180200220240260280300-50-250 255075100125150 BST Charging Current [PA] Temperature [ C] C001 VVIN=VSW=9V 051015-50-250255075100125150 ICSP, ICSN [PA] Temperature [ C] C001 ICSP ICSN -4504590135180-1001020304010001000010000 0100000010000000 GAIN [dB] FREQUENCY [Hz] C002 PHASE GAIN ACL=101, COMP unload PHASE [ ] 0246801020304050607080 VVCC [V] IVCC [mA] C001 No load 0246801234567891011121314 VVCC [V] VVIN [V] C001 No load JUNE2017 ProductFolderLinks: LM5122-Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedTypical Characteristics(continued)Figure7. VVCCvs IVCCF igure8. VVCCvs VVINF igure9. ErrorAmplifierGainand Phasevs FrequencyFigure10. ICSP, ICSNvs TemperatureFigure11. VBST-SWvs VSWF igure12. IBSTvs [V] Temperature [ C] C001 VSW = 12V VSW = 9V VVIN = VSW IBST = -70uA 707580456789101112 VCS-TH1 [mV] VVIN [V] C001 VVIN=VCSP 60657075808590-50-250255075100125150 VCS-TH1 [mV] Temperature [ C] C001 12LM5122-Q1 SNVSAW9 : LM5122-Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedTypical Characteristics(continued)Figure13.