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Partno	Mfg	Dc	Qty	Available	Descript
TLE4470	INFIEON	N/a	100	avai	Voltage Regulator
TLE4470	INFINEON	N/a	479	avai	Voltage Regulator
TLE4470	LNFINEON	N/a	570	avai	Voltage Regulator

TLE4470 ,Voltage Regulatorapplications where two stabilized voltages arerequired.The device operates in the wide junction tem ..
TLE4470 ,Voltage RegulatorFunctional DescriptionThe TLE 4470 is a monolithic integrated voltage regulator with two very low-d ..
TLE4470 ,Voltage RegulatorFeatures Stand-by output 180 mA; 5 V

TLE4470
Voltage Regulator
DualLow-DropVoltageRegulatorTLE4470
FunctionalDescription
TheTLE4470isamonolithicintegratedvoltageregulatorwithtwoverylow-drop
outputs,amainoutputQ2forloadsupto350mAandastandbyoutputQ1providinga
maximumof180mA.ThedeviceisavailableintwopackagestheP-DSO-14-4and
P-DSO-20-6.Itisdesignedtosupplymicroprocessorsystemsunderthesevere
conditionsofautomotiveapplicationsandisthereforeequippedwithadditional
protectionfunctionsagainstoverload,shortcircuitandovertemperature.Ofcoursethe
TLE4470canalsobeusedinotherapplicationswheretwostabilizedvoltagesare
required.
Thedeviceoperatesinthewidejunctiontemperaturerangeof–40Cto150C.
FeaturesStand-byoutput180mA;5V-2%AdjustableresetswitchingthresholdMainoutput350mA;trackedtothestand-byoutputLowquiescentcurrentconsumptioninstandbymodeDisablefunctionformainoutputWideoperationrange:upto45VVerylowdropoutPower-On-Resetcircuitsensingthestand-byvoltageEarlywarningcomparatorforsupplyundervoltageOutputprotectedagainstshortcircuitWidetemperaturerange:–40Cto150COver-temperatureprotectionOver-loadprotection
anexternalvoltagedividerthemainoutputvoltagecanbesettoVQ2∫5VfortheTLE4470Gtype(P-DSO-20-6package).VQ1iscomparedtothevoltageatpinADJ2,
whichisproportionaltotheoutputvoltageVQ2.Acontrolamplifierdrivesthebaseofthe
seriesPNPtransistorviaabuffer.
ThemainoutputvoltageVQ2istrackedtotheaccuracyofthestand-byoutput.
FortheTLE4470GS(P-DSO-14-4package)theoutputvoltageisfixedto5V.saveenergye.g.inbatterypoweredbodyelectronicapplications,themainregulator
canbeswitchedoffviathedisableinput,whichcausesthecurrentconsumptiontodrop180←Atypical.
TwoadditionalfeaturesoftheTLE4470areanearlywarningcomparator(canbeused
e.g.tomonitorthesupplyvoltageVI)andresetgeneratorwithanadjustableresetdelay
time.TheTLE4470G(P-DSO-20-6package)hasinadditionanadjustablereset
switchingthreshold.Thisfeatureisusefulwithmicroprocessorswhichguaranteeasafe
operationdowntovoltagesbelowtheinternallysetresetthresholdof4.65Vtypical.
Twofunctionsareincludedintheresetgenerator,apower-on-resetandan
under-voltagereset.Thepower-on-resetfeatureisnecessaryforadefinedstartofthe
microprocessorwhenswitchingontheapplication.Theresetsignaliskeptlowfora
certaindelaytimeaftertheoutputvoltageVQ1oftheregulatorhassurpassedthereset
threshold.Anexternaldelaycapacitorsetsthisdelaytime.Theundervoltagereset
circuitsupervisesthestand-byoutputvoltage.IncaseVQ1fallsbelowtheresetswitching
thresholdtheresetoutputissetLOWafterashortreactiontime.TheresetLOWsignalgenerateddowntoanoutputvoltageVQ1of1V.
Figure1PinConfiguration(topview)
PinDefinitionsandFunctions
P-DSO-20-6
RADJAdjustableresetswitchingthresholdisnotavailableintheP-DSO-14-4
package.Resetisalwaystriggeredattheinternalthreshold.
ADJ2MainregulatoradjustinputisinternallyconnectedtoVQ2
P-DSO-14-4
Figure2BlockDiagram
AbsoluteMaximumRatings
–40C
Stand-byRegulatorInputI1
MainRegulatorInputI2
Stand-byOutputQ1
MainOutputQ2
MainRegulatorAdjustInputADJ2
SenseOutputSQ
ResetOutputRQ
Note:ESD-ProtectionaccordingtoMILStd.883:-2kV.
Maximumratingsareabsoluteratings;exceedinganyoneofthesevaluesmay
causeirreversibledamagetotheintegratedcircuit.
DisableInputDIS
SenseInputSI
ResetDelayD
ResetSwitchingThresholdAdjustRADJ
Temperatures
AbsoluteMaximumRatings(cont’d)
–40CNote:Intheoperatingrangethefunctionsgiveninthecircuitdescriptionarefulfilled.
OperatingRange
ThermalResistancesP-DSO-14-4PackagemountedonPCB80⌠80⌠1.5mm3;35←Cu;5←Sn;Footprintonly;zeroairflow.
ThermalResistancesP-DSO-20-6
ElectricalCharacteristicsI1=VI2=14V;VDIS
Stand-byRegulator
Output1
CurrentConsumption
RegulatorPerformance
Main-Regulator
Output2
CurrentConsumption
RegulatorPerformance
ElectricalCharacteristics(cont’d)I1=VI2=14V;VDISDisableInputDIS
ResetTimingDandOutputRQ
ElectricalCharacteristics(cont’d)I1=VI2=14V;VDISNote1:MeasuredwhentheoutputvoltageVQhasdropped100mVfromthenominal
value.
Note2:VQ2connectedtoADJ2
Note3:SquarewaveatVI:8Vto18V;f=10kHz;tr=tf100ns
SenseInputSIandOutputSQ
ElectricalCharacteristics(cont’d)I1=VI2=14V;VDIS

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