LP2985LVMicropower150mALow-NoiseLow-DropoutRegulatorinSOT-23andmicroSMDpackagesforApplicationswithOutputVoltages≤2.3VMay2004
LP2985LV
Micropower150mALow-NoiseLow-DropoutRegulatorinSOT-23andmicroSMDpackagesforApplicationswithOutputVoltages≤2.3V
DesignedforUsewithVeryLowESROutputCapacitors
GeneralDescription
TheLP2985LVisa150mA,fixed-outputvoltageregulatordesignedtoprovidehighperformanceandlownoiseinap-plicationsrequiringoutputvoltages<2.3V.
UsinganoptimizedVIP™(VerticallyIntegratedPNP)pro-cess,theLP2985LVdeliversunequalledperformanceinallspecificationscriticaltobattery-powereddesigns:
GroundPinCurrent:Typically825µA@150mAload,and75µA@1mAload.
EnhancedStability:TheLP2985LVisstablewithoutputcapacitorESRaslowas5mΩ,whichallowstheuseofceramiccapacitorsontheoutput.
SleepMode:Lessthan1µAquiescentcurrentwhenON/OFFpinispulledlow.
SmallestPossibleSize:microSMDpackageusesabsoluteminimumboardspace.
PrecisionOutput:1%toleranceoutputvoltagesavailable(Agrade).
LowNoise:Byaddinga10nFbypasscapacitor,outputnoisecanbereducedto30µV(typical).
Features
nnnnnnnnnnnnn
Guaranteed150mAoutputcurrentSmallestpossiblesize(microSMD)
RequiresminimumexternalcomponentsStablewithlow-ESRoutputcapacitor<1µAquiescentcurrentwhenshutdownLowgroundpincurrentatallloadsOutputvoltageaccuracy1%(AGrade)Highpeakcurrentcapability
Widesupplyvoltagerange(16Vmax)LowZOUT:0.3Ωtypical(10Hzto1MHz)Overtemperature/overcurrentprotection
−40˚Cto+125˚CjunctiontemperaturerangeCustomvoltagesavailable
Applications
nnnn
CellularPhone
Palmtop/LaptopComputer
PersonalDigitalAssistant(PDA)
Camcorder,PersonalStereo,Camera
BlockDiagram
10129501
VIP™isatrademarkofNationalSemiconductorCorporation.
©2004NationalSemiconductorCorporationDS101295www.national.com
元器件交易网www.cecb2b.com
LP2985LVBasicApplicationCircuit
10129502
*ON/OFFinputmustbeactivelyterminated.TietoVINifthisfunctionisnottobeused.
**Minimumcapacitanceisshowntoensurestability(maybeincreasedwithoutlimit).Ceramiccapacitorrequiredforoutput(seeApplicationHints).***Reducesoutputnoise(maybeomittedifapplicationisnotnoisecritical).Useceramicorfilmtypewithverylowleakagecurrent(seeApplicationHints).
ConnectionDiagrams
5-LeadSmallOutlinePackage(M5)
microSMD,5BumpPackage(BPA05&BLA05)
10129503
TopView
SeeNSPackageNumberMF05AFororderinginformationseeTable1
10129523
Note:Theactualphysicalplacementofthepackagemarkingwillvaryfromparttopart.Packagemarkingcontainsdatecodeandlottraceability
information,andwillvaryconsiderably.Packagemarkingdoesnotcorrelatetodevicetype.
TopView
SeeNSPackageNumberBPA05&BLA05
PinDescrption
Name
SOT-23
VINGNDON/OFFBYPASSVOUT12345
PinNumber
microSMD
C3A1A3B2C1
InputVoltage
CommonGround(devicesubstrate)Logichighenableinput
BypasscapacitorforlownoiseoperationRegulatedoutputvoltage
Function
www.national.com2
元器件交易网www.cecb2b.com
LP2985LVOrderingInformation
TABLE1.PackageMarkingandOrderingInformation
OutputVoltage(V)
Grade
OrderInformation
PackageMarkingLF7ALF7ALF7BLF7BLCHALCHALCHBLCHBLAYALAYALAYBLAYBLCDALCDALCDBLCDB
Suppliedas:
5-LeadSmallOutlinePackage(M5)
1.351.351.351.351.51.51.51.51.81.81.81.82.02.02.02.01.51.51.51.51.81.81.81.81.81.81.81.81.81.81.81.8
AASTDSTDAASTDSTDAASTDSTDAASTDSTDAASTDSTDAASTDSTDAASTDSTDAASTDSTD
LP2985AIM5X-135LP2985AIM5-135LP2985IM5X-135LP2985IM5-135LP2985AIM5X-1.5LP2985AIM5-1.5LP2985IM5X-1.5LP2985IM5-1.5LP2985AIM5X-1.8LP2985AIM5-1.8LP2985IM5X-1.8LP2985IM5-1.8LP2985AIM5X-2.0LP2985AIM5-2.0LP2985IM5X-2.0LP2985IM5-2.0LP2985AIBP-1.5LP2985AIBPX-1.5LP2985IBP-1.5LP2985IBPX-1.5LP2985AIBP-1.8LP2985AIBPX-1.8LP2985IBP-1.8LP2985IBPX-1.8LP2985AIBL-1.8LP2985AIBLX-1.8LP2985IBL-1.8LP2985IBLX-1.8LP2985AITP-1.8LP2985AITPX-1.8LP2985ITP-1.8LP2985ITPX-1.8
3000UnitsonTapeandReel1000UnitsonTapeandReel3000UnitsonTapeandReel1000UnitsonTapeandReel3000UnitsonTapeandReel1000UnitsonTapeandReel3000UnitsonTapeandReel1000UnitsonTapeandReel3000UnitsonTapeandReel1000UnitsonTapeandReel3000UnitsonTapeandReel1000UnitsonTapeandReel3000UnitsonTapeandReel1000UnitsonTapeandReel3000UnitsonTapeandReel1000UnitsonTapeandReel250UnitsonTapeandReel3000UnitsonTapeandReel250UnitsonTapeandReel3000UnitsonTapeandReel250UnitsonTapeandReel3000UnitsonTapeandReel250UnitsonTapeandReel3000UnitsonTapeandReel250UnitsonTapeandReel3000UnitsonTapeandReel250UnitsonTapeandReel3000UnitsonTapeandReel250UnitsonTapeandReel3000UnitsonTapeandReel250UnitsonTapeandReel3000UnitsonTapeandReel
microSMD,5BumpPackage(BPA05-170µmball)
microSMD,5BumpPackage(BLA05-300µmball)
microSMD,5BumpPackage(TPA05-170µmball)
3www.national.com
元器件交易网www.cecb2b.com
LP2985LVAbsoluteMaximumRatings(Note1)
IfMilitary/Aerospacespecifieddevicesarerequired,pleasecontacttheNationalSemiconductorSalesOffice/Distributorsforavailabilityandspecifications.StorageTemperatureRangeOperatingJunctionTemperatureRange
LeadTemp.(Soldering,5sec.)ESDRating(Note2)PowerDissipation(Note3)
−65˚Cto+150˚C−40˚Cto+125˚C
260˚C2kV
InternallyLimited
InputSupplyVoltage(Survival)InputSupplyVoltage(Operating)ShutdownInputVoltage(Survival)OutputVoltage(Survival,(Note4))IOUT(Survival)
Input-OutputVoltage(Survival,(Note5))
−0.3Vto+16V2.2Vto+16V−0.3Vto+16V−0.3Vto+9VShortCircuitProtected−0.3Vto+16V
ElectricalCharacteristics(Note10)
LimitsinstandardtypefaceareforTJ=25˚C.andlimitsinboldfacetypeapplyoverthefulloperatingtemperaturerange.Un-lessotherwisespecified:VIN=VO(NOM)+1V,IL=1mA,CIN=1µF,COUT=4.7µF,VON/OFF=2V.
LP2985AI-X.X
Symbol∆VOParameter
OutputVoltageTolerance
Conditions
IL=1mA
1mA≤IL≤50mA1mA≤IL≤150mA
OutputVoltageLineRegulation
IGNDGroundPinCurrent
IL=0IL=1mAIL=10mAIL=50mAIL=150mAVON/OFF<0.3VVON/OFF<0.15V
VIN(min)
MinimumInputVoltageRequiredTomaintainOutputRegulation(Note9)
IL=50mA
VIN-VOUTDropoutVoltage(Note9)
ON/OFFInputVoltage(Note7)
ON/OFFInputCurrentOutputNoiseVoltage(RMS)
IL=150mAHigh=O/PONLow=O/POFFVON/OFF=0VON/OFF=5V
enBW=300Hzto50kHz,COUT=10µFCBYPASS=10nFVOUT=1.8V
30
µV
65751203008250.010.052.05
VO(NOM)+1V≤VIN≤16V
0.007Typ
(Note6)Min−1.0−1.5−2.5−2.5−3.5
Max1.01.52.52.53.50.0140.03295125110170220400500900120020000.822.20
LP2985I-X.X(Note6)Min−1.5−2.5−3.5−3.0−4.0
Max1.52.53.53.04.00.0140.03295125110170220400500900120020000.822.20
VµA%/V%VNOMUnits
1202801.40.550.015
1.6
150250350600
1.6
0.15−215
1502503506000.15−215
mV
VON/OFFION/OFFVµA
www.national.com4
元器件交易网www.cecb2b.com
LP2985LVElectricalCharacteristics(Note10)
(Continued)
LimitsinstandardtypefaceareforTJ=25˚C.andlimitsinboldfacetypeapplyoverthefulloperatingtemperaturerange.Un-lessotherwisespecified:VIN=VO(NOM)+1V,IL=1mA,CIN=1µF,COUT=4.7µF,VON/OFF=2V.
LP2985AI-X.X
Symbol
Parameter
RippleRejection
Conditions
f=1kHz,CBYPASS=10nFCOUT=10µF
Typ
(Note6)Min
45400350
Max
LP2985I-X.X(Note6)Min
Max
dBmAmAUnits
IO(SC)IO(PK)
ShortCircuitCurrentPeakOutputCurrent
RL=0(SteadyState)(Note8)
VOUT≥Vo(NOM)−5%
Note1:“AbsoluteMaximumRatings”indicatelimitsbeyondwhichdamagetothecomponentmayoccur.Electricalspecificationsdonotapplywhenoperatingthedeviceoutsideofitsratedoperatingconditions.
Note2:TheESDratingofpins3and4fortheSOT-23package,orpins5and2forthemicroSMDpackage,is1kV.
Note3:Themaximumallowablepowerdissipationisafunctionofthemaximumjunctiontemperature,TJ(MAX),thejunction-to-ambientthermalresistance,θJ-A,andtheambienttemperature,TA.Themaximumallowablepowerdissipationatanyambienttempertureiscalculatedusing:
WherethevalueofθJ-AfortheSOT-23packageis220˚C/WinatypicalPCboardmounting.Exceedingthemaximumallowabledissipationwillcauseexcessivedietemperature,andtheregulatorwillgointothermalshutdown.
Note4:Ifusedinadual-supplysystemwheretheregulatorloadisreturnedtoanegativesupply,theLP2985LVoutputmustbediode-clampedtoground.Note5:TheoutputPNPstructurecontainsadiodebetweentheVINtoVOUTterminalsthatisnormallyreverse-biased.ReversingthepolarityfromVINtoVOUTwillturnonthisdiode,andpossiblydamagethedevice(SeeApplicationHints).
Note6:Limitsare100%productiontestedat25˚C.LimitsovertheoperatingtemperaturerangeareguaranteedthroughcorrelationusingStatisticalQualityControl(SQC)methods.ThelimitsareusedtocalculateNational’sAverageOutgoingQualityLevel(AOQL).
Note7:TheON/OFFinputmustbeproperlydriventopreventpossiblemisoperation.Fordetails,refertoApplicationHints.
Note8:TheLP2985LVhasfoldbackcurrentlimitingwhichallowsahighpeakcurrentwhenVOUT>0.5V,andthenreducesthemaximumoutputcurrentasVOUTisforcedtoground(seeTypicalPerformanceCharacteristicscurves).
Note9:VINmustbethegreaterof2.2VorVOUT(nom)+DropoutVoltagetomaintainoutputregulation.DropoutVoltageisdefinedastheinputtooutputdifferentialatwhichtheoutputvoltagedrops2%belowthervaluemeasuredwitha1Vdifferential.
Note10:ExposingthemicroSMDdevicetodirectsunlightwillcausemisoperation.SeeApplicationHintsforadditionalinformation.
5www.national.com
元器件交易网www.cecb2b.com
LP2985LVTypicalPerformanceCharacteristics
VIN=VOUT(NOM)+1,VOUTVOUTvsTemperature
Unlessotherwisespecified:CIN=1µF,COUT=4.7µF,
=1.8V,TA=25˚C,ON/OFFpinistiedtoVINShort-CircuitCurrent
10129516
10129507
Short-CircuitCurrentShort-CircuitCurrentvsOutputVoltage
10129517
10129518
RippleRejection
COUT=4.7µF,Bypass=10nFRippleRejection
COUT=4.7µF,NoBypass
1012952510129526
www.national.com6
元器件交易网www.cecb2b.com
LP2985LVTypicalPerformanceCharacteristicsUnlessotherwisespecified:CIN=1µF,COUT=4.7µF,
VIN=VOUT(NOM)+1,VOUT=1.8V,TA=25˚C,ON/OFFpinistiedtoVIN(Continued)
OutputImpedancevsFrequency
OutputImpedancevsFrequency
1012952710129532
NoiseDensityNoiseDensity
1012953310129537
GroundPinvsLoadCurrentMinimumInputVoltagevsTemperature
1012951310129509
7www.national.com
元器件交易网www.cecb2b.com
LP2985LVTypicalPerformanceCharacteristicsUnlessotherwisespecified:CIN=1µF,COUT=4.7µF,
VIN=VOUT(NOM)+1,VOUT=1.8V,TA=25˚C,ON/OFFpinistiedtoVIN(Continued)
MinimumInputVoltagevsTemperature
InputCurrentvsVIN10129541
10129510
InputCurrentvsVINInputCurrentvsVIN1012951110129512
GroundPinCurrentvsTemperatureInstantaneousShortCircuitCurrent
1012951410129515
www.national.com8
元器件交易网www.cecb2b.com
LP2985LVTypicalPerformanceCharacteristicsUnlessotherwisespecified:CIN=1µF,COUT=4.7µF,
VIN=VOUT(NOM)+1,VOUT=1.8V,TA=25˚C,ON/OFFpinistiedtoVIN(Continued)
OutputCharacteristics
LoadTransient
10129542
10129508
LoadTransientLoadTransient
1012954310129544
LineTransientLineTransient
1012954510129546
9www.national.com
元器件交易网www.cecb2b.com
LP2985LVTypicalPerformanceCharacteristicsUnlessotherwisespecified:CIN=1µF,COUT=4.7µF,
VIN=VOUT(NOM)+1,VOUT=1.8V,TA=25˚C,ON/OFFpinistiedtoVIN(Continued)
LineTransient
LineTransient
1012954710129548
Turn-OnTimeTurn-OnTime
1012954910129552
Turn-OnTimeTurn-OnTime
1012955010129551
www.national.com10
元器件交易网www.cecb2b.com
LP2985LVApplicationHints
EXTERNALCAPACITORS
Likeanylow-dropoutregulator,theLP2985LVrequiresex-ternalcapacitorsforregulatorstability.Thesecapacitorsmustbecorrectlyselectedforgoodperformance.InputCapacitor
Aninputcapacitorwhosecapacitanceis≥1µFisrequiredbetweentheLP2985LVinputandground(theamountofcapacitancemaybeincreasedwithoutlimit).
Thiscapacitormustbelocatedadistanceofnotmorethan1cmfromtheinputpinandreturnedtoacleananalogground.Anygoodqualityceramic,tantalum,orfilmcapacitormaybeusedattheinput.
Important:Tantalumcapacitorscansuffercatastrophicfail-ureduetosurgecurrentwhenconnectedtoalow-impedancesourceofpower(likeabatteryorverylargecapacitor).IfaTantalumcapacitorisusedattheinput,itmustbeguaranteedbythemanufacturertohaveasurgecurrentratingsufficientfortheapplication.
TherearenorequirementsforESRontheinputcapacitor,buttoleranceandtemperaturecoefficientmustbeconsid-eredwhenselectingthecapacitortoensurethecapacitancewillbe≥1µFovertheentireoperatingtemperaturerange.OutputCapacitor
TheLP2985LVisdesignedspecificallytoworkwithceramicoutputcapacitors,utilizingcircuitrywhichallowstheregula-tortobestableacrosstheentirerangeofoutputcurrentwithanoutputcapacitorwhoseESRisaslowas5mΩ.ItmayalsobepossibletouseTantalumorfilmcapacitorsattheoutput,butthesearenotasattractiveforreasonsofsizeandcost(seenextsectionCapacitorCharacteristics).
Theoutputcapacitormustmeettherequirementformini-mumamountofcapacitanceandalsohaveanESR(equiva-lentseriesresistance)valuewhichiswithinthestablerange.CurvesareprovidedwhichshowthestableESRrangeasafunctionofloadcurrent(seeESRgraphsFigure1andFigure2).
10129520
FIGURE2.LP2985LV4.7µFStableESRRangeImportant:TheoutputcapacitormustmaintainitsESRwithinthestableregionoverthefulloperatingtemperaturerangeoftheapplicationtoassurestability.
TheLP2985LVrequiresaminimumof2.2µFontheoutput(outputcapacitorsizecanbeincreasedwithoutlimit).
Itisimportanttorememberthatcapacitortoleranceandvariationwithtemperaturemustbetakenintoconsiderationwhenselectinganoutputcapacitorsothattheminimumrequiredamountofoutputcapacitanceisprovidedoverthefulloperatingtemperaturerange.Itshouldbenotedthatceramiccapacitorscanexhibitlargechangesincapacitancewithtemperature(seenextsection,CapacitorCharacteris-tics).
Theoutputcapacitormustbelocatednotmorethan1cmfromtheoutputpinandreturnedtoacleananalogground.NoiseBypassCapacitor
Connectinga10nFcapacitortotheBypasspinsignificantlyreducesnoiseontheregulatoroutput.Itshouldbenotedthatthecapacitorisconnecteddirectlytoahigh-impedancecir-cuitinthebandgapreference.
Becausethiscircuithasonlyafewmicroamperesflowinginit,anysignificantloadingonthisnodewillcauseachangeintheregulatedoutputvoltage.Forthisreason,DCleakagecurrentthroughthenoisebypasscapacitormustneverex-ceed100nA,andshouldbekeptaslowaspossibleforbestoutputvoltageaccuracy.
Thetypesofcapacitorsbestsuitedforthenoisebypasscapacitorareceramicandfilm.High-qualityceramiccapaci-torswitheitherNPOorCOGdielectrictypicallyhaveverylowleakage.10nFpolypropoleneandpolycarbonatefilmcapacitorsareavailableinsmallsurface-mountpackagesandtypicallyhaveextremelylowleakagecurrent.
CAPACITORCHARACTERISTICS
TheLP2985LVwasdesignedtoworkwithceramiccapaci-torsontheoutputtotakeadvantageofthebenefitstheyoffer:forcapacitancevaluesinthe2.2µFto4.7µFrange,ceramicsaretheleastexpensiveandalsohavethelowestESRvalues(whichmakesthembestforeliminatinghigh-frequencynoise).TheESRofatypical2.2µFceramiccapacitorisintherangeof10mΩto20mΩ,whicheasilymeetstheESRlimitsrequiredforstabilitybytheLP2985LV.
11
www.national.com
10129519
FIGURE1.LP2985LV2.2µFStableESRRange
元器件交易网www.cecb2b.com
LP2985LVApplicationHints
(Continued)
Onedisadvantageofceramiccapacitorsisthattheircapaci-tancecanvarywithtemperature.Mostlargevalueceramiccapacitors(≥2.2µF)aremanufacturedwiththeZ5UorY5Vtemperaturecharacteristic,whichresultsinthecapacitancedroppingbymorethan50%asthetemperaturegoesfrom25˚Cto85˚C.
Thiscouldcauseproblemsifa2.2µFcapacitorwereusedontheoutputsinceitwilldropdowntoapproximately1µFathighambienttemperatures(whichcouldcausetheLP2985LVtooscillate).IfZ5UorY5Vcapacitorsareusedontheoutput,aminimumcapacitancevalueof4.7µFmustbeobserved.
Abetterchoicefortemperaturecoefficientinceramiccapaci-torsisX7R,whichholdsthecapacitancewithin±15%.Un-fortunately,thelargervaluesofcapacitancearenotofferedbyallmanufacturersintheX7Rdielectric.
Tantalum
Tantalumcapacitorsarelessdesirablethanceramicsforuseasoutputcapacitorsbecausetheyaremoreexpensivewhencomparingequivalentcapacitanceandvoltageratingsinthe1µFto4.7µFrange.
AnotherimportantconsiderationisthatTantalumcapacitorshavehigherESRvaluesthanequivalentsizeceramics.ThismeansthatwhileitmaybepossibletofindaTantalumcapacitorwithanESRvaluewithinthestablerange,itwouldhavetobelargerincapacitance(whichmeansbiggerandmorecostly)thanaceramiccapacitorwiththesameESRvalue.
ItshouldalsobenotedthattheESRofatypicalTantalumwillincreaseabout2:1asthetemperaturegoesfrom25˚Cdownto−40˚C,sosomeguardbandmustbeallowed.
On/offInputOperation
TheLP2985LVisshutoffbydrivingtheON/OFFinputlow,andturnedonbypullingithigh.Ifthisfeatureisnottobeused,theON/OFFinputshouldbetiedtoVINtokeeptheregulatoroutputonatalltimes.
Toassureproperoperation,thesignalsourceusedtodrivetheON/OFFinputmustbeabletoswingaboveandbelowthespecifiedturn-on/turn-offvoltagethresholdslistedintheElectricalCharacteristicssectionunderVON/OFF.Topreventmis-operation,theturn-on(andturn-off)voltagesignalsap-pliedtotheON/OFFinputmusthaveaslewratewhichis≥40mV/µs.
Caution:theregulatoroutputvoltagecannotbeguaranteedifaslow-movingAC(orDC)signalisappliedthatisintherangebetweenthespecifiedturn-onandturn-offvoltageslistedundertheelectricalspecificationVON/OFF(seeElectri-calCharacteristics).
REVERSEINPUT-OUTPUTVOLTAGE
ThePNPpowertransistorusedasthepasselementintheLP2985LVhasaninherentdiodeconnectedbetweentheregulatoroutputandinput.Duringnormaloperation(wheretheinputvoltageishigherthantheoutput)thisdiodeisreverse-biased.
However,iftheoutputispulledabovetheinput,thisdiodewillturnONandcurrentwillflowintotheregulatoroutput.Insuchcases,aparasiticSCRcanlatchwhichwillallowahighcurrenttoflowintoVIN(andoutthegroundpin),whichcandamagethepart.
Inanyapplicationwheretheoutputmaybepulledabovetheinput,anexternalSchottkydiodemustbeconnectedfromVINtoVOUT(cathodeonVIN,anodeonVOUT),tolimitthereversevoltageacrosstheLP2985LVto0.3V(seeAbsoluteMaximumRatings).
MICROSMDMOUNTING
ThemicroSMDpackagerequiresspecificmountingtech-niqueswhicharedetailedinNationalSemiconductorAppli-cationNote#1112.ReferringtothesectionSurfaceMountTechnology(SMT)AssemblyConsiderations,itshouldbenotedthatthepadstylewhichmustbeusedwiththe5-pinpackageistheNSMD(non-soldermaskdefined)type.
Forbestresultsduringassembly,alignmentordinalsonthePCboardmaybeusedtofacilitateplacementofthemicroSMDdevice.
MICROSMDLIGHTSENSITIVITY
ExposingthemicroSMDdevicetodirectsunlightwillcausemisoperationofthedevice.LightsourcessuchasHalogenlampscanalsoaffectelectricalperformanceifbroughtneartothedevice.
Thewavelenghtswhichhavethemostdetrimentaleffectareredsandinfra-reds,whichmeansthatthefluorescentlight-ingusedinsidemostbuildingshasverylittleeffectonper-formance.AmicroSMDtestboardwasbroughttowithin1cmofafluorescentdesklampandtheeffectontheregu-latedoutputvoltagewasnegligible,showingadeviationoflessthan0.1%fromnominal.
www.national.com12
元器件交易网www.cecb2b.com
LP2985LVPhysicalDimensions
inches(millimeters)unlessotherwisenoted
5-LeadSmallOutlinePackage(M5)
NSPackageNumberMF05A
ForOrderNumbers,refertoTable1inthe“OrderingInformation”sectionofthisdocument.
13www.national.com
元器件交易网www.cecb2b.com
LP2985LVPhysicalDimensions
inches(millimeters)unlessotherwisenoted(Continued)
NOTES:UNLESSOTHERWISESPECIFIED1.EPOXYCOATING
2.63Sn/37PbEUTECTICBUMP
3.RECOMMENDNON-SOLDERMASKDEFINEDLANDINGPAD.
4.PIN1ISESTABLISHEDBYLOWERLEFTCORNERWITHRESPECTTOTEXTORIENTATION.REMAININGPINSARENUMBEREDCOUNTERCLOCKWISE.
5.XXXINDRAWINGNUMBERREPRESENTSPACKAGESIZEVARIATIONWHEREX1ISPACKAGEWIDTH,X2ISPACKAGELENGTHANDX3ISPACKAGEHEIGHT.
6.NOJEDECREGISTRATIONASOFAUG.1999.
microSMD,5Bump,Package(BPA05-170µmball)
NSPackageNumberBPA05A
ForOrderNumbers,refertoTable1“OrderingInformation”sectionofthisdocument.
ThedimensionsforX1,X2andX3areasgiven:
X1=0.930+/−0.030mmX2=1.107+/−0.030mmX3=0.945+/−0.100mm
www.national.com14
元器件交易网www.cecb2b.com
LP2985LVPhysicalDimensions
inches(millimeters)unlessotherwisenoted(Continued)
NOTES:UNLESSOTHERWISESPECIFIED1.EPOXYCOATING
2.63Sn/37PbEUTECTICBUMP
3.RECOMMENDNON-SOLDERMASKDEFINEDLANDINGPAD.
4.PIN1ISESTABLISHEDBYLOWERLEFTCORNERWITHRESPECTTOTEXTORIENTATION.REMAININGPINSARENUMBEREDCOUNTERCLOCKWISE.
5.XXXINDRAWINGNUMBERREPRESENTSPACKAGESIZEVARIATIONWHEREX1ISPACKAGEWIDTH,X2ISPACKAGELENGTHANDX3ISPACKAGEHEIGHT.
6.NOJEDECREGISTRATIONASOFAUG.1999.
microSMD,5Bump,Package(BLA05-300µmball)
NSPackageNumberBLA05A
ForOrderNumbers,refertoTable1“OrderingInformation”sectionofthisdocument.
ThedimensionsforX1,X2andX3areasgiven:
X1=1.057+/−0.030mmX2=1.412+/−0.030mmX3=0.945+/−0.100mm
15www.national.com
元器件交易网www.cecb2b.com
LP2985LVPhysicalDimensions
inches(millimeters)unlessotherwisenoted(Continued)
NOTES:UNLESSOTHERWISESPECIFIED1.EPOXYCOATING
2.63Sn/37PbEUTECTICBUMP
3.RECOMMENDNON-SOLDERMASKDEFINEDLANDINGPAD.
4.PIN1ISESTABLISHEDBYLOWERLEFTCORNERWITHRESPECTTOTEXTORIENTATION.REMAININGPINSARENUMBEREDCOUNTERCLOCKWISE.
5.XXXINDRAWINGNUMBERREPRESENTSPACKAGESIZEVARIATIONWHEREX1ISPACKAGEWIDTH,X2ISPACKAGELENGTHANDX3ISPACKAGEHEIGHT.
6.NOJEDECREGISTRATIONASOFAUG.1999.
microSMD,5Bump,Package(TPA05-170µmball)
NSPackageNumberTPA05
ForOrderNumbers,refertoTable1“OrderingInformation”sectionofthisdocument.
ThedimensionsforX1,X2andX3areasgiven:
X1=0.930+/−0.030mmX2=1.107+/−0.030mmX3=0.500+/−0.075mm
www.national.com16
元器件交易网www.cecb2b.com
LP2985LVMicropower150mALow-NoiseLow-DropoutRegulatorinSOT-23andmicroSMDpackagesforApplicationswithOutputVoltages≤2.3VNotes
LIFESUPPORTPOLICY
NATIONAL’SPRODUCTSARENOTAUTHORIZEDFORUSEASCRITICALCOMPONENTSINLIFESUPPORTDEVICESORSYSTEMSWITHOUTTHEEXPRESSWRITTENAPPROVALOFTHEPRESIDENTANDGENERALCOUNSELOFNATIONALSEMICONDUCTORCORPORATION.Asusedherein:1.Lifesupportdevicesorsystemsaredevicesorsystemswhich,(a)areintendedforsurgicalimplantintothebody,or(b)supportorsustainlife,andwhosefailuretoperformwhenproperlyusedinaccordancewithinstructionsforuseprovidedinthelabeling,canbereasonablyexpectedtoresultinasignificantinjurytotheuser.BANNEDSUBSTANCECOMPLIANCE
NationalSemiconductorcertifiesthattheproductsandpackingmaterialsmeettheprovisionsoftheCustomerProductsStewardshipSpecification(CSP-9-111C2)andtheBannedSubstancesandMaterialsofInterestSpecification(CSP-9-111S2)andcontainno‘‘BannedSubstances’’asdefinedinCSP-9-111S2.
NationalSemiconductorAmericasCustomerSupportCenter
Email:new.feedback@nsc.comTel:1-800-272-9959
www.national.com
NationalSemiconductor
EuropeCustomerSupportCenter
Fax:+49(0)180-5308586Email:europe.support@nsc.com
DeutschTel:+49(0)6995086208EnglishTel:+44(0)8702402171FrançaisTel:+33(0)141918790
NationalSemiconductorAsiaPacificCustomerSupportCenter
Email:ap.support@nsc.com
NationalSemiconductor
JapanCustomerSupportCenterFax:81-3-5639-7507
Email:jpn.feedback@nsc.comTel:81-3-5639-7560
2.Acriticalcomponentisanycomponentofalifesupportdeviceorsystemwhosefailuretoperformcanbereasonablyexpectedtocausethefailureofthelifesupportdeviceorsystem,ortoaffectitssafetyoreffectiveness.
Nationaldoesnotassumeanyresponsibilityforuseofanycircuitrydescribed,nocircuitpatentlicensesareimpliedandNationalreservestherightatanytimewithoutnoticetochangesaidcircuitryandspecifications.
因篇幅问题不能全部显示，请点此查看更多更全内容