LT3070 datasheet(5/28 Pages) LINER

5 / 28 page

LT3070

3070fa

electricAl chArActeristics The

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. COUT = 15µF (Note 9), VIN = VOUT + 0.3V (Note 5), VBIAS = 2.5V unless

otherwise noted.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VBIASRippleRejection

VBIAS=VOUT+1.5VAVG,VRIPPLE=0.5VP-P,fRIPPLE=120Hz,

VIN–VOUT=300mV,IOUT=2.5A

VINRippleRejection

(Notes3,4,5)

VBIAS=2.5V,VRIPPLE=50mVP-P,fRIPPLE=120Hz,

VIN–VOUT=300mV,IOUT=2.5A

ReferenceVoltageNoise

(REF/BYPPin)

CREF/BYP=10nF,BW=10Hzto100kHz

µVRMS

OutputVoltageNoise

VOUT=1V,IOUT=5A,CREF/BYP=10nF,COUT=15µF,

BW=10Hzto100kHz

µVRMS

Note 1:StressesbeyondthoselistedunderAbsoluteMaximumRatings

maycausepermanentdamagetothedevice.ExposuretoanyAbsolute

MaximumRatingconditionforextendedperiodsmayaffectdevice

reliabilityandlifetime.

Note 2:TheLT3070regulatorsaretestedandspecifiedunderpulseload

conditionssuchthatTJ≅TA.TheLT3070Eis100%testedatTA=25°C.

Performanceat–40°Cand125°Cisassuredbydesign,characterization

andcorrelationwithstatisticalprocesscontrols.TheLT3070Iis

guaranteedoverthe–40°Cto125°Coperatingjunctiontemperaturerange.

TheLT3070MPis100%testedandguaranteedoverthe–55°Cto125°C

operatingjunctiontemperaturerange.

Note 3:Tomaintainproperperformanceandregulation,theBIASsupply

voltagemustbehigherthantheINsupplyvoltage.ForagivenVOUT,the

BIASvoltagemustsatisfythefollowingconditions:2.2V≤VBIAS≤3.6V

andVBIAS≥(1.25•VOUT+1V).ForVOUT≤0.95V,theminimumBIAS

voltageislimitedto2.2V.

Note 4:Operatingconditionsarelimitedbymaximumjunction

temperature.Theregulatedoutputvoltagespecificationdoesnotapply

forallpossiblecombinationsofinputvoltageandoutputcurrent.When

operatingatmaximumoutputcurrent,limittheinputvoltagerangeto

VIN<VOUT+500mV.

Note 5:TheLT3070incorporatessafeoperatingareaprotectioncircuitry.

CurrentlimitdecreasesastheVIN-VOUTvoltageincreases.Currentlimit

foldbackstartsatVIN–VOUT>500mV.SeetheTypicalPerformance

CharacteristicsforagraphofCurrentLimitvsVIN–VOUTvoltage.The

currentlimitfoldbackfeatureisindependentofthethermalshutdown

circuity.

Note 6:Dropoutvoltage,VDO,istheminimuminputtooutputvoltage

differentialataspecifiedoutputcurrent.Indropout,theoutputvoltage

equalsVIN–VDO.

Note 7:GNDpincurrentistestedwithVIN=VOUT(NOMINAL)+300mVanda

currentsourceload.VIOCisabufferedoutputdeterminedbythevalueof

VOUTasprogrammedbytheVO2-VO0pins.VIOC’soutputisindependentof

themarginingfunction.

Note 8:ReverseoutputcurrentistestedwiththeINpinsgroundedandthe

OUT+SENSEpinsforcedtotheratedoutputvoltage.Thisismeasuredas

currentintotheOUT+SENSEpins.

Note 9:FrequencyCompensation:TheLT3070mustbefrequency

compensatedatitsOUTpinswithaminimumCOUTof15µFconfigured

asaclusterof(15

×)1µFceramiccapacitorsorasagraduatedcluster

of10µF/4.7µF/2.2µFceramiccapacitorsofthesamecasesize.Linear

TechnologyonlyrecommendsX5RorX7Rdielectriccapacitors.

LT3070 Datasheet(PDF) 5 Page - Linear Technology

LT3070 Datasheet(HTML) 5 Page - Linear Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

Datasheet Descarga

Enlace URL