MAX8753ETI+,MAX8753ETI+T,MAX8753ETI+,MAX8753ETI+T,

GeneralDescriptionTheMAX8753quadruple-outputDC-DCconverterpro-videstheregulatedvoltagesrequiredbyactive-matrix,thin-filmtransistor(TFT),liquid-crystaldisplays(LCDs).Itincludesahigh-powerstep-upregulator(VMAIN),twolow-powerchargepumps(VPOSandVNEG),andalow-voltage300mAlinearregulator(VLOGIC).Thestep-upDC-DCconverterisahigh-frequency(1MHz)current-moderegulatorwithabuilt-inpowerMOSFETthatallowstheuseofultra-smallinductorsandceramiccapacitors.Itprovidesfasttransientresponsetopulsedloadsandincludesanautomaticpulse-skip-pingmodethatincreasesefficiencyoverawide-loadcurrentrange.The1.5Acurrentlimitallowsa+10Vout-putatmorethan300mAfroma+3.3Vinput.Thetwochargepumpsindependentlyregulateonepositiveandonenegativeoutputvoltage.Thepositivechargepumpisavoltagetriplerthatacceptsaninputvoltageupto+13Vanddeliversa20mAoutputupto+28Vwithoutexternalswitchesordiodes.Thenegativechargepumpinvertsaninputvoltageupto+24Vanddeliversa20mAnegativeoutputusingexternaldiodes.ThelogiclinearregulatorconvertstheIC’s+2.6V-to-+5.5Vinputtoaregulated+2.5Voradjustableoutput.TheMAX8753isavailableina28-pinthinQFNpack-agewithamaximumthicknessof0.8mmforultra-thinLCDpaneldesign.ApplicationsNotebookComputers,PDAsCarNavigationDisplaysLCDMonitorsFeatures3IntegratedDC-DCConverters,1LDO1MHzCurrent-ModePWMBoostRegulatorUpto+13VMainHigh-PowerOutput±1%AccuracyHighEfficiency(90%)DualCharge-PumpOutputsNoExternalDiodesforPositiveChargePumpUpto+28VPositiveCharge-PumpOutputNegativeCharge-PumpOutput300mALogicLinearRegulator+2.6Vto+5.5VInputOperatingRange0.8mAQuiescentCurrentInternalSupplySequencingandSoft-StartThermalProtectionUltra-Thin,28-PinTQFNPackage(0.8mmmax)MAX8753TFTLCDDC-DCConverterwithIntegratedChargePumps________________________________________________________________MaximIntegratedProducts119-3919;Rev0;1/06Forpricing,delivery,andorderinginformation,pleasecontactMaxim/DallasDirect!at1-888-629-4642,orvisitMaxim’swebsiteat°Cto85°C28ThinQFN(5mmx5mm)PinConfigurationMAX8753TQFNTOPVIEW2627252410911N.C.C2POUTPINTGFB12SUPPN.C.C3PI.C.LXI.C.FBN12SHDN4567202119171615LCDONC1NN.C.INOUTLFBLC2NSUPN318288C1PFBPDLP2313GNDN.C.2214REFPGND+Denoteslead-freepackage.芯天下--“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedintheoperationalsectionsofthespecificationsisnotimplied.Exposuretoabsolutemaximumratingconditionsforextendedperiodsmayaffectdevicereliability.IN,SHDN,LCDONtoGND......................................-0.3Vto+6VDLP,OUTL,FBL,FBP,FBN,INTG,FB,REFtoGND............................................-0.3Vto(VIN+0.3V)PGNDtoGND.......................................................-0.3Vto+0.3VLXtoPGND............................................................-0.3Vto+14VSUPPtoPGND.......................................................-0.3Vto+14VC1N,C2NtoPGND................................-0.3Vto(VSUPP+0.3V)OUTPtoPGND........................................(VSUPP-0.3V)to+30VC1PtoC1N,C2PtoC2N,OUTPtoC2P................-0.3Vto+14VSUPNtoPGND.......................................................-0.3Vto+30VC3PtoPGND.........................................-0.3Vto(VSUPN+0.3V)ContinuousPowerDissipation(TA=+70°C)28-Pin5mmx5mmTQFN(derated21.3mW/°Cabove+70°C)............................................................1702mWOperatingTemperatureRange..........................-40°Cto+85°CJunctionTemperature......................................................+150°CStorageTemperatureRange.............................-65°Cto+150°CLeadTemperature(soldering,10s).................................+300°CELECTRICALCHARACTERISTICS(CircuitofFigure1,VIN=3.0V,SHDN=LCDON=IN,VSUPP=VSUPN=10V,PGND=GND,CREF=0.22µF,CINTG=470pF,TA=0°Cto+85°C.TypicalvaluesareatTA=+25°C,unlessotherwisenoted.)PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSINPUTSUPPLIESInputSupplyRangeVIN2.65.5VInputUndervoltageThresholdVUVLOVINrising,100mVhysteresis(typ)2.12.32.5VINQuiescentSupplyCurrentIINVFB=VFBP=1.5V,VFBN=-0.2V0.81.5mAINShutdownCurrentVSHDN=0,VIN=5V0.110µASUPPSupplyRangeVSUPP713VSUPPQuiescentCurrentISUPPVFBP=1.5V0.40.8mASUPPShutdownCurrentVSHDN=0,VSUPP=14V,OUTPfloating0.110µASUPNSupplyRangeVSUPN724VSUPNQuiescentCurrentISUPNVFBN=-0.2V0.40.8mASUPNShutdownCurrentVSHDN=0,VSUPN=24V0.110µAMAINBOOSTCONVERTEROutputVoltageRangeVMAINVIN13VFBRegulationVoltageVFB1.2321.2451.258VFBInputBiasCurrentIFBVFB=1.25V,INTG=GND125275nAFBUndervoltageShutdownThresholdFBfalling75125200mVOperatingFrequencyfOSC0.851.001.15MHzOscillatorMaximumDutyCycle788590%LoadRegulationIMAIN=0to100mA,VMAIN=10V0.2%Lin