Texas Instruments LM2621 Handleiding

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LM2621

SNVS033D–MAY2004–REVISEDNOVEMBER2015

LM2621LowInputVoltage,Step-UpDC-DCConverter

1Features3Description

TheLM2621isahighefficiency,step-upDC-DC

1

•SmallVSSOP8Package(HalftheFootprintof

switchingregulatorforbattery-poweredandlowinput

Standard8-PinSOICPackage)

voltagesystems.Itacceptsaninputvoltagebetween

•1.09-mmPackageHeight

1.2Vand14Vandconvertsitintoaregulatedoutput

•Upto2-MHzSwitchingFrequency

voltage.Theoutputvoltagecanbeadjustedbetween

1.24Vand14V.Ithasaninternal0.17-ΩN-Channel

•1.2-Vto14-VInputVoltage

MOSFETpowerswitch.Efficienciesupto90%are

•1.24-Vto14-VAdjustableOutputVoltage

achievableusingtheLM2621.

•Upto1ALoadCurrent

Thehighswitchingfrequency(adjustableupto2

•0.17-ΩInternalMOSFET

MHz)oftheLM2621allowsfortinysurfacemount

•Upto90%RegulatorEfficiency

inductorsandcapacitors.Becauseoftheunique

constant-duty-cyclegatedoscillatortopologyvery

•80-µATypicalOperatingCurrent

highefficienciesarerealizedoverawideloadrange.

•<2.5-µASpecifiedSupplyCurrentInShutdown

Thesupplycurrentisreducedto80µAbecauseof

theBiCMOSprocesstechnology.Intheshutdown

2Applications

mode,thesupplycurrentislessthan2.5µA.

•PDAs,CellularPhones

TheLM2621isavailableinaVSSOP-8package.

•2-Celland3-CellBattery-OperatedEquipment

Thispackageuseshalftheboardareaofastandard

8-pinSOICandhasaheightofjust1.09mm.

•PCMCIACards,MemoryCards

•FlashMemoryProgramming

DeviceInformation

(1)

•TFT/LCDApplications

PARTNUMBERPACKAGEBODYSIZE(NOM)

•3.3-Vto5.0-VConversion

LM2621VSSOP(8)3.00mmx3.00mm

•GPSDevices

(1)Forallavailablepackages,seetheorderableaddendumat

•Two-WayPagers

theendofthedatasheet.

•PalmtopComputers

•Hand-HeldInstruments

TypicalApplicationCircuit

1

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

Product specificaties