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LP3872
,
LP3875
SNVS227H–FEBRUARY2003–REVISEDJANUARY2015
LP387x1.5-AFastUltra-Low-DropoutLinearRegulators
1Features3Description
TheLP387xseriesoffastultralow-dropoutlinear
1
•InputVoltageRange:2.5Vto7V
regulatorsoperatefroma2.5-Vto7-Vinputsupply.
•UltraLow-DropoutVoltage
Widerangeofpresetoutputvoltageoptionsare
•LowGroundPinCurrent
available.Theseultralow-dropoutlinearregulators
respondveryquicklytostepchangesinload,which
•LoadRegulationof0.06%
makesthemsuitableforlow-voltagemicroprocessor
•10-nAQuiescentCurrentinShutdownMode
applications.TheLP3872andLP3875aredeveloped
•EnsuredOutputCurrentof1.5-ADC
onaCMOSprocesswhichallowslowquiescent
currentoperationindependentofoutputloadcurrent.
•AvailableinDDPAK/TO-263,TO-220,and
ThisCMOSprocessalsoallowstheLP3872and
SOT-223Packages
LP3875tooperateunderextremelylowdropout
•OutputVoltageAccuracy±1.5%
conditions.
•ERRORFlagforOutputStatus
DropoutVoltage:Ultralow-dropoutvoltage;typically
•SenseOptionImprovesLoadRegulation
38mVat150-mAloadcurrentand380mVat1.5-A
•MinimumOutputCapacitorRequirements
loadcurrent.
•Overtemperature/OvercurrentProtection
GroundPinCurrent:Typically6mAat1.5-Aload
•−40°Cto125°CJunctionTemperatureRange
current.
ShutdownMode:Typically10-nAquiescentcurrent
2Applications
whentheSDpinispulledlow.
•MicroprocessorPowerSupplies
ERRORFlag:ERRORflaggoeslowwhentheoutput
•GTL,GTL+,BTL,andSSTLBusTerminators
voltagedrops10%belownominalvalue(LP3872
•PowerSuppliesforDSPs
only).
•SCSITerminators
SENSE:Sensepinimprovesregulationatremote
•PostRegulators
loads(LP3875only).
•HighEfficiencyLinearRegulators
PrecisionOutputVoltage:Multipleoutputvoltage
optionsareavailablerangingfrom1.8Vto5Vwitha
•BatteryChargers
specifiedaccuracyof±1.5%atroomtemperature,
•OtherBattery-PoweredApplications
and±3.0%overallconditions(varyingline,load,and
space
temperature).
space
DeviceInformation
(1)
space
PARTNUMBERPACKAGEBODYSIZE(NOM)
space
SOT-223(5)6.50mm×3.56mm
space
LP3872
TO-263(5)10.16mm×8.42mm
LP3872TypicalApplicationCircuit
SOT-223(5)6.50mm×3.56mm
LP3875TO-263(5)10.16mm×8.42mm
TO-220(5)14.986mm×10.16mm
(1)Forallavailablepackages,seetheorderableaddendumat
theendofthedatasheet.
LP3875TypicalApplicationCircuit
*SDandERRORpinsmustbepulledhigh
througha10-kΩpullupresistor.Connect
theERRORpintogroundifthisfunctionis
notused.SeetheShutdownModeand
ERRORFlagOperationsections.
*SDmustbepulledhighthrougha10-kΩ
pullupresistor.SeetheShutdownMode
section.
1
AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,
intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.
Produktspecifikationer
| Varumärke: | Texas Instruments |
| Kategori: | ej kategoriserat |
| Modell: | LP3875 |
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