LP2985-N Micropower 150-mA Low-Noise Ultra-Low …

1 FLP2985 FGNDINBYPASSOUTVOUTVINCIN1 FProductFolderSample &BuyTechnicalDocumentsTools &SoftwareSupport &CommunityReferenceDesignAn IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand MARCH2000 REVISEDDECEMBER2016LP2985-NMicropower150 -mALow-NoiseUltra-Low-DropoutRegulatorin a SOT-23 PackageDesignedfor Use With Very Low ESR OutputCapacitors11 Features1 V to 16 V UltraLow-DropoutVoltage Ensured150 mA OutputCurrent RequiresMinimumExternalComponents StableWithLow-ESRO utputCapacitor < 1 A QuiescentCurrentWhenShutDown Low GroundPin Currentat All Loads OutputVoltageAccuracy1% (A Grade) HighPeakCurrentCapability Low ZOUT.

2 Typical(10 Hz to 1 MHz) Overtemperatureand OvercurrentProtection 40 C to 125 C JunctionTemperatureRange CustomVoltagesAvailable2 Applications CellularPhones Palmtopand LaptopComputers PersonalDigitalAssistants(PDA) Camcorders,PersonalStereos,Cameras3 DescriptionTheLP2985-Nlownoiselinear(LDO )regulatordeliversup to 150-mAoutputcurrentandonlyrequires300-mV dropoutvoltageof inputto optimizedverticallyintegratedPNP(VIP)pro cess,theLP2985-Ndeliversunequaledperform ancefor all toleranceprecisionoutputvoltagewith only 75- A quiescentcurrentat 1-mA load and 850 A at addinga 10-nF bypasscapacitor,the outputnoisecan be reducedto 30 VRMSin a designedto workwitha ceramicoutputcapacitorwithequivalentseri esresistance(ESR)as low as 5 m.

3 The deviceis V to V. ContactTexasInstrumentSalesfor (1)PARTNUMBERPACKAGEBODYSIZE(NOM)LP2985- NSOT-23(5) x (1) For all availablepackages,see the orderableaddendumatthe end of the MARCH2000 :LP2985-NSubmitDocumentationFeedbackCopy right 2000 2016,TexasInstrumentsIncorporatedTableof Contents1 Pin Configurationand Applicationand Deviceand Mechanical,Packaging,and RevisionHistoryNOTE:Pagenumbersfor previousrevisionsmay differfrompagenumbersin the (May2015)to RevisionYPage Addedtop nav icon for TI Deleted"SmallestPossibleSize(SOT-23 Package)" Deletedall informationre: DSBGA package- it is no DeletedDSBGApin functioninfo Deletedinforre: DSBGA package;changed".

4 Valueof R JAfor the SOT-23packageis " to "..valueofR JAfor the SOT-23packageis " in footnote3 toAbsMaxtable- see updatethermalinfo for Changed"All pins except3 and 4 (SOT-23)" to "Pins3 and 4 ." ..4 Changedthermalvaluesfor SOT-23package;addedNote2 Deletedfootnote1 Changedcontentin last 2 (September2014)to RevisionXPage Changedpin namesin text and app circuitdrawing"VOUT" and "VIN" to "OUT" and "IN"; replaceHandlingRatingswithESDR atings; Changedfootnote1 toAbMaxtableper new Changedlocationof (April2013)to RevisionWPage AddedPinConfigurationandFunctionssection ,HandlingRatingtable,FeatureDescriptions ection,DeviceFunctionalModes,Application andImplementationsection,PowerSupplyReco mmendationssection,Layoutsection,Devicea ndDocumentationSupportsection,andMechani cal,Packaging, MARCH2000 REVISEDDECEMBER2016 ProductFolderLinks:LP2985-NSubmitDocumen tationFeedbackCopyright 2000 2016,TexasInstrumentsIncorporatedChanges fromRevisionU (April2013)to RevisionVPage Changedlayoutof MARCH2000.

5 LP2985-NSubmitDocumentationFeedbackCopyr ight 2000 2016,TexasInstrumentsIncorporated5 Pin Configurationand FunctionsDBVP ackage5 Pin SOT-23 Top ViewPin low noiseoperationGND2 Commonground(devicesubstrate)IN1 IInputvoltageON/OFF3 ILogichigh enableinputOUT5 ORegulatedoutputvoltageJ _ MAXAMAXJATTPR MARCH2000 REVISEDDECEMBER2016 ProductFolderLinks:LP2985-NSubmitDocumen tationFeedbackCopyright 2000 2016,TexasInstrumentsIncorporated(1)Stre ssesbeyondthoselistedunderAbsoluteMaximu mRatingsmay causepermanentdamageto the stressratingsonly,whichdo not implyfunctionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditions. Exposureto absolute-maximum-ratedconditionsfor extendedperiodsmay affectdevicereliability.

6 (2)If Military/Aerospacespecifieddevicesare required,contactthe TexasInstrumentsSalesOffice/Distributors for availabilityandspecifications.(3)The maximumallowablepowerdissipationis a functionof the maximumjunctiontemperature,TJ_MAX, the junction-to-ambientthermalresistance,R JA, and the ambienttemperature,TA. The maximumallowablepowerdissipationat any ambienttemperatureis calculatedusing:Wherethe valueof R JAfor the SOT-23packageis C/Win a typicalPC maximumallowabledissipationwill causeexcessivedie temperature,and the regulatorwill go into thermalshutdown.(4)For 12-Voption,outputvoltagesurvival: to +16 V. If usedin a dual-supplysystemwherethe regulatorload is returnedto anegativesupply,the LP2985-Noutputmustbe diode-clampedto ground.

7 (5)The outputPNPstructurecontainsa diodebetweenthe IN to OUTpins that is polarityfromIN toOUTwill turn on this (unlessotherwisenoted)(1)(2)MINMAXUNITO peratingjunctiontemperature 40125 CPowerdissipation(3)InternallyLimitedInp utsupplyvoltage(survival) (operating) (survival) (survival)(4) (survival)ShortCircuitProtectedInput-out putvoltage(survival)(5) ,Tstg 65150 C(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a (ESD)ElectrostaticdischargeHuman-bodymod el(HBM),perANSI/ESDA/JEDECJS-001(1)Pins3 and 4 1000 VPins1, 2, and 5 2000(1)RecommendedminimumVINis the greaterof V or VOUT(MAX)+ rateddropoutvoltage(maximum)for operatingload (unlessotherwisenoted) (1)16 VVON/OFFON/OFFinputvoltage0 VINVIOUTO utputcurrent150mATJO peratingjunctiontemperature 40125 C6LP2985-NSNVS018Y MARCH2000 :LP2985-NSubmitDocumentationFeedbackCopy right 2000 2016,TexasInstrumentsIncorporated(1)For moreinformationabouttraditionaland new thermalmetrics,seeSemiconductorandICPack ageThermalMetricsapplicationreport,SPRA9 53.

8 (2)ThermalresistancevalueR JAis basedon the EIA/JEDECHigh-Kprintedcircuitboarddefine dby JESD51-7 HighEffectiveThermalConductivityTestBoar dfor (1)LP2985-NUNITDBV(SOT-23)5 PINSR JAJunction-to-ambientthermalresistance,H ighK(2) C/WR JC(top)Junction-to-case(top) C/WR C/W C/W C/W(1)Limitsare 100%productiontestedat 25 C. Limitsoverthe operatingtemperaturerangeare ensuredthroughcorrelationusingStatistica lQualityControl(SQC) limitsare usedto calculateTI's AverageOutgoingQualityLevel(AOQL).(2)Dro poutvoltageis definedas the inputto outputdifferentialat whichthe outputvoltagedrops100 mV belowthe valuemeasuredwith a1-V :VIN= VO(NOM)+ 1 V, IL= 1 mA, CIN= 1 F, COUT= F, VON/OFF= 2 V, TJ= 25 (1) (1)UNITMINMAXMINMAX VOOutputvoltagetoleranceIL= 1 mA 11 mA IL 50 mA mA IL 50 mA, 40 C TJ 125 C mA IL 150 mA 331 mA IL 150 mA, 40 C TJ 125 C 44 VO/ VINO utputvoltageVO(NOM)+1V VIN 16 regulationVO(NOM)+1V VIN 16 V, 40 C TJ 125 VODropoutvoltage(2)IL= 0 mA133mVIL= 0 mA, 40 C TJ 125 C55IL= 1 mA71010IL= 1 mA, 40 C TJ 125 C1515IL= 10 mA406060IL= 10 mA, 40 C TJ 125 C9090IL= 50 mA120150150IL= 50 mA, 40 C TJ 125 C225225IL= 150 mA280350350IL= 150 mA, 40 C TJ 125 MARCH2000 REVISEDDECEMBER2016 ProductFolderLinks.

9 LP2985-NSubmitDocumentationFeedbackCopyr ight 2000 2016,TexasInstrumentsIncorporatedElectri calCharacteristics(continued)Unlessother wisespecified:VIN= VO(NOM)+ 1 V, IL= 1 mA, CIN= 1 F, COUT= F, VON/OFF= 2 V, TJ= 25 (1) (1)UNITMINMAXMINMAX(3)The ON/OFFinputmustbe properlydrivento details,refertoON/OFFI nputOperation.(4)The LP2985-Nhas foldbackcurrentlimitingwhichallowsa high peakcurrentwhenVOUT> V, and thenreducesthe maximumoutputcurrentas VOUTis forcedto ground(seeTypicalCharacteristicscurves). IGNDG roundpin currentIL= 0 mA659595 AIL= 0 mA, 40 C TJ 125 C125125IL= 1 mA75110110IL= 1 mA, 40 C TJ 125 C170170IL= 10 mA120220220IL= 10 mA, 40 C TJ 125 C400400IL= 50 mA350600600IL= 50 mA, 40 C TJ 125 C10001000IL= 150 mA85015001500IL= 150 mA, 40 C TJ 125 C25002500 VON/OFF< < , 40 C TJ 125 (3)High= O/P O/P ON, 40 C TJ 125 = O/P = O/P OFF, 40 C TJ 125 0 AVON/OFF= 0 V, 40 C TJ 125 C 2 2 VON/OFF= 5 V5 VON/OFF= 5 V, 40 C TJ 125 C1515enOutputnoisevoltage(RMS)BW = 300 Hz to 50 kHz, VCOUT= 10 F30 CBYPASS= 10 nF VO/ VINR ipplerejectionf = 1 kHz,CBYPASS= 10 nF45dBCOUT= 10 FIO(SC)ShortcircuitcurrentRL= 0 (steadystate)(4)400mAIO(PK)Peakoutputcur rentVOUT VO(NOM) 5%350mA8LP2985-NSNVS018Y MARCH2000.

10 LP2985-NSubmitDocumentationFeedbackCopyr ight 2000 2016, :CIN= 1 F, COUT= F, VIN= VOUT(NOM)+ 1, TA= 25 C, ON/OFFpin is tied to VOUTvs TemperatureFigure2. ShortCircuitCurrentvs OutputVoltageFigure3. RippleRejectionFigure4. RippleRejectionFigure5. RippleRejectionFigure6. MARCH2000 REVISEDDECEMBER2016 ProductFolderLinks:LP2985-NSubmitDocumen tationFeedbackCopyright 2000 2016,TexasInstrumentsIncorporatedTypical Characteristics(continued)Unlessotherwis especified:CIN= 1 F, COUT= F, VIN= VOUT(NOM)+ 1, TA= 25 C, ON/OFFpin is tied to RippleRejectionFigure8. RippleRejectionFigure9. RippleRejectionFigure10. RippleRejectionFigure11. RippleRejectionFigure12. OutputImpedancevs Frequency10LP2985-NSNVS018Y MARCH2000 :LP2985-NSubmitDocumentationFeedbackCopy right 2000 2016,TexasInstrumentsIncorporatedTypical Characteristics(continued)Unlessotherwis especified:CIN= 1 F, COUT= F, VIN= VOUT(NOM)+ 1, TA= 25 C, ON/OFFpin is tied to OutputImpedancevs FrequencyFigure14.