COS29302WU

COS29302
www.cosine-ic.com 1Features
■HighCurrentCapability:3.0A
■WideInputVoltageRange:4~18V
■LowDropoutVoltage
■LowGroundCurrent
■Accurate2%Tolerance
■FastTransientResponse
■AdjustableOutputVoltage
■ExtendedTemperatureRanges
From-40°Cto+125°C
■AvailableinGreenTO-263andTO-220
Applications
■AutomotiveElectronics
■Battery-PoweredEquipment
■High-EfficiencyLinearPowerSupplies
■High-EfficiencyGreenComputerSystems
■High-EfficiencyPost-Regulatorfor
SwitchingSupply
Rev1.0
Copyright@2018CosineNanoelectronicsInc.Allrightsreserved
Theinformationprovidedhereisbelievedtobeaccurateandreliable.CosineNanoelectronicsassumes
noreliabilityforinaccuraciesandomissions.Specificationsdescribedandcontainedherearesubjected
tochangewithoutnoticeonthepurposeofimprovingthedesignandperformance.Allofthisinformation
describedhereinshouldnotbeimpliedorgrantedforanythirdparty.GeneralDescription
TheCOS29302isahighcurrent,highaccuracy,
lowdropoutvoltage(LDO)regulatorwhich
features350mVto425mV(fullload)typical
dropoutvoltagesandverylowgroundcurrent.
Designedforhighcurrentloads,thedevice
alsofindsapplicationsinlowercurrent,
extremelylowdropoutcriticalsystems,where
theirtinydropoutvoltageandgroundcurrent
valuesareimportantattributes.
TheCOS29302arefullyprotectedagainst
overcurrentfaults,reversedinputpolarity,
reversedleadinsertion,overtemperature
operation,andpositiveandnegativetransient
voltagespikes.Fivepinversionsfeaturelogic
levelON/OFFcontrol(COS29302)andanerror
flagthatsignalswhenevertheoutputfallsoutof
regulation(COS29303).Flaggedstatesinclude
lowinputvoltage(dropout),outputcurrentlimit,
overtemperatureshutdown,andextremely
highvoltagespikesontheinput.
TypicalApplicationCircuits3ALowDropoutRegulator
COS29302
www.cosine-ic.com 21PinConfigurationandFunctions
PinFunctions
PinNoPinNameI/O Description
2 IN IINPUT:Suppliesthecurrenttotheoutputpowerdevice.
4 OUTOOUTPUT:Theregulatoroutputvoltage.
3 GND-GROUND
1 EN IENABLE:AvailableforCOS29xx2.CMOScompatiblecontrolinput.
Logic-high=enable,logic-low=shutdown
5 ADJIADJUST:Adjustableregulatorfeedbackinputthatconnectstothe
resistorvoltagedividerthatisplacedfromOUTtoGNDinorderto
settheoutputvoltage.
– TAB -Internallyconnecteddirectlytothedevicepin3(GND).Thethermal
tabmustbeconnectedtoacopperareaonthePCBatthesame
potentialasdevicepin3(GND)toassurethermalperformance,or
leavethethermaltabfloating.DoNOTconnectthethermaltabto
anypotentialotherthanthesamepotentialatdevicepin3.
2PackageandOrderingInformation
Model OrderNumber Package PackageOption MarkingInformation
COS29302COS29302WUTO-263-5TapeandReel,800 COS29302WU
COS29302
www.cosine-ic.com 33ProductSpecification
3.1AbsoluteMaximumRatings(1)
Parameter Rating Units
MaximumInputVoltage:VIN 19 V
EnableInputVoltage -0.3VtoVIN V
StorageTemperatureRange -55to150 °C
OperatingJunctionTemperature -40to125 °C
ESDSusceptibility,HBM 2000 V
(1)Stressesexceedingtheabsolutemaximumratingsmaydamagethedevice.Thedevicemaynotfunctionorbeoperable
abovetherecommendedoperatingconditionsandstressingthepartstotheselevelsisnotrecommended.Inaddition,
extendedexposuretostressesabovetherecommendedoperatingconditionsmayaffectdevicereliability.Theabsolute
maximumratingsarestressratingsonly.
3.2ThermalData
Parameter Rating Unit
PackageThermalResistance,RθJC
(Junction-to-case)2(TO-220)
3(TO-263)°C/W
3.3RecommendedOperatingConditions
Parameter Rating Unit
InputSupplyVoltage +4.5V~+18V V
OperatingAmbientTemperature -40to+85 °C
COS29302
www.cosine-ic.com 43.4ElectricalCharacteristics
(VIN=VOUT+1V,IOUT=100mA,TA=+25°C,unlessotherwisenoted)
Parameter Symbol Conditions Min.Typ.Max.Unit
OutputVoltage
OutputVoltage VOUTIOUT=10mA -1-+1%
10mA≤IOUT≤IFL,
(VOUT+1V)≤VIN≤18V-2-+2%
LineRegulationIOUT=10mA,
(VOUT+1V)≤VIN≤18V0.31 %
LoadRegulation 10mA≦IOUT≦1.5A 0.23 %
OutputVoltageTemperature
CoefficientΔVo/ΔT 20100ppm/°C
DropoutVoltage
ΔVOUT=-1%IOUT=100mA -80175
mV IOUT=1.5A -250-
IOUT=3A -370600
CurrentLimit ILIMVOUT=0V -4.04.8 A
OutputNoiseVoltage enCL=10µF,IL=100mA,
10Hzto100kHz-390-µVrms
CL=33µF,IL=100mA,
10Hzto100kHz-211-µVrms
GroundCurrent
GroundCurrent
(VIN=VOUT+1V)IGNDIOUT=1.5A -5-
mA
IOUT=3A -28-
GroundPinCurrentatDropout
(VINis0.5Vlessthanspecified
VOUT)IGRNDDOIOUT=10mA -2-mA
GroundCurrentinShutdown -575nA
Reference
ReferenceVoltage 1.221.2401.252V
ReferenceVoltageTemperature
Coefficient-20-ppm/°C
AdjustPinBiasCurrent – -100pA
ENABLEInput
InputLogicVoltageLow(OFF) –0.8V
InputLogicVoltageHigh(ON) 2.4– V
EnablePinInputCurrentVEN=0.8V –24pA
VEN=26V –3 nA
RegulatorOutputCurrentin
Shutdown–40°C≤TJ≤+125°C –18µA
COS29302
www.cosine-ic.com 54ApplicationNotes
TheCOS29302isahigh-performancelow-dropoutvoltageregulatorsuitableforallmoderate-current
voltageregulatorapplications.Their350mVto425mVtypicaldropoutvoltageatfullloadmake
themespeciallyvaluableinbatterypoweredsystemsandashighefficiencynoisefiltersin
post-regulatorapplications.
TheCOS29302isfullyprotectedfromdamageduetofaultconditions.Currentlimitingisprovided.
Thislimitingislinear;outputcurrentunderoverloadconditionsisconstant.Thermalshutdown
disablesthedevicewhenthedietemperatureexceedsthe+125°Cmaximumsafeoperating
temperature.Linetransientprotectionallowsdeviceandloadsurvivalevenwhentheinputvoltage
spikesbetween0and+18V.COS29302offeralogic-levelON/OFFcontrol.Whendisabled,the
devicesdrawnearlyzerocurrent.
4.1TypicalApplicationCircuit
Figure1TypicalApplicationCircuit
4.2AdjustableRegulatorDesign
COS29302allowsprogrammingtheoutputvoltageanywherebetween1.25Vandthe18V.Two
externalresistorsareusedinthetypicalapplicationcircuitasshowninFigure1.Theresistorvalues
arecalculatedbyfollowingequation.
COS29302
www.cosine-ic.com 6R1=R2×(VOUT/1.240–1)
Intheequationabove,VOUTisthedesiredoutputvoltage.TheresistorvaluebetweenVOUTandthe
adjustpinshouldnotexceed10kΩ.Largervaluescancauseinstability.Applicationswithwidely
varyingloadcurrentsmayscaletheresistorstodrawtheminimumloadcurrentrequiredforproper
operation.
4.3CapacitorRequirements
Forstabilityandminimumoutputnoise,acapacitorontheregulatoroutputisnecessary.Thevalue
ofthiscapacitorisdependentupontheoutputcurrent;lowercurrentsallowsmallercapacitors.The
COS29302regulatorarestablewiththeminimumcapacitorvaluesof10µFatfullload.This
capacitorneednotbeanexpensivelowESRtype:aluminumelectrolyticsareadequate.Infact,
extremelylowESRcapacitorsmaycontributetoinstability.Tantalumcapacitorsarerecommended
forsystemswherefastloadtransientresponseisimportantwheretheregulatorispoweredfroma
sourcewithhighACimpedance,a0.1μFcapacitorconnectedbetweenInputandGNDis
recommended.Thiscapacitorshouldhavegoodcharacteristicstoabove250kHz.
4.4MinimumLoadCurrent
TheCOS29302regulatorsarespecifiedbetweenfiniteloads.Iftheoutputcurrentistoosmall,
leakagecurrentsdominateandtheoutputvoltagerises.The7mAminimumloadcurrentswamps
anyexpectedleakagecurrentacrosstheoperatingtemperaturerange
4.5EnableInput
COS29302versionsfeatureanenable(EN)inputthatallowsON/OFFcontrolofthedevice.Special
designallows“zero”currentdrainwhenthedeviceisdisabled;onlymicro-amperesofleakage
currentflows.TheENinputhasTTL/CMOScompatiblethresholdsforsimpleinterfacingwithlogic,
ormaybetiedtoVINifitisnotrequiredforON/OFFcontrol.
COS29302
www.cosine-ic.com 75PackageInformation
5.1TO-263-5(PackageOutlineDimensions)
*criticalcontroldimensions