Texas Instruments LP3871 Bedienungsanleitung
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LP3871
,
LP3874
SNVS225H–FEBRUARY2003–REVISEDJUNE2015
LP387x0.8-AFastUltra-Low-DropoutLinearRegulators
1Features3Description
TheLP3871andLP3874seriesoffastultra-low-
1
•InputVoltage:2.5Vto7V
dropoutlinearregulatorsoperatefroma2.5-Vto7-V
•Ultra-Low-DropoutVoltage
inputsupply.Widerangeofpresetoutputvoltage
•LowGroundPinCurrent
optionsareavailable.Theseultra-low-dropoutlinear
regulatorsrespondveryquicklytostepchangesin
•LoadRegulationof0.04%
load,whichmakesthemsuitableforlowvoltage
•10-nAQuiescentCurrentinShutdownMode
microprocessorapplications.Thedevicesare
•SpecifiedOutputCurrentof0.8-ADC
developedonaCMOSprocesswhichallowslow
quiescentcurrentoperationindependentofoutput
•OutputVoltageAccuracy±1.5%
loadcurrent.ThisCMOSprocessalsoallowsthe
•ERRORFlagIndicatesOutputStatus
LP3871andLP3874tooperateunderextremelylow
•SENSEOptionImprovesLoadRegulation
dropoutconditions.
•MinimumOutputCapacitorRequirements
DropoutVoltage:Ultra-low-dropoutvoltage;typically
•Overtemperature/OvercurrentProtection
24mVat80-mAloadcurrentand240mVat0.8-A
•−40°Cto+125°CJunctionTemperatureRange
loadcurrent.
GroundPinCurrent:Typically6mAat0.8-Aload
2Applications
current.
•MicroprocessorPowerSupplies
ShutdownMode:Typically10-nAquiescentcurrent
•GTL,GTL+,BTL,andSSTLBusTerminators
whentheSDpinispulledlow.
•PowerSuppliesforDSPs
ERRORFlag:ERRORflaggoeslowwhentheoutput
•SCSITerminator
voltagedrops10%belownominalvalue.
•PostRegulators
SENSE:SENSEpinimprovesregulationatremote
•High-EfficiencyLinearRegulators
loads.
•BatteryChargers
PrecisionOutputVoltage:Multipleoutputvoltage
•OtherBattery-PoweredApplications
optionsareavailablerangingfrom1.8Vto5Vwitha
ensuredaccuracyof±1.5%atroomtemperature,and
±3%overallconditions(varyingline,load,and
temperature).
DeviceInformation
(1)
PARTNUMBERPACKAGEBODYSIZE(NOM)
SOT-223(5)6.50mmx3.56mm
LP3871
LP3874
DDPAK/TO-263(5)10.16mmx8.42mm
(1)Forallavailablepackages,seetheorderableaddendumat
theendofthedatasheet.
TypicalApplications
*SDmustbepulledhighthrougha10-kΩ
pullupresistor.SeeApplicationand
*SDandERRORpinsmustbepulledhigh
Implementationformoreinformation.
througha10-kΩpullupresistor.Connect
theERRORpintogroundifthisfunctionis
notused.SeeApplicationand
Implementationformoreinformation.
1
AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,
intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.
Produktspezifikationen
| Marke: | Texas Instruments |
| Kategorie: | Nicht kategorisiert |
| Modell: | LP3871 |
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