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V

TT

LP2998

PV

IN

V

DDQ

V

REF

AV

IN

V

REF

=

0.75V

V

SENSE

GND

+

+

+

V

DDQ

=

1.5V

V

DD

=

2.5V

V

TT

=

0.75V

SD

SD

C

IN

C

OUT

C

REF

Product

Folder

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Buy

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Documents

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LP2998

,

LP2998-Q1

SNVS521K–DECEMBER2007–REVISEDAUGUST2014

LP2998/LP2998-Q1DDRTerminationRegulator

1Features3Description

TheLP2998linearregulatorisdesignedtomeet

1

•AEC-Q100TestGuidancewiththefollowing

JEDECSSTL-2andJEDECSSTL-18specifications

results(SOPowerPAD-8):

forterminationofDDR-SDRAMandDDR2memory.

–DeviceHBMESDClassificationLevelH1C

ThedevicealsosupportsDDR3andDDR3LVTTbus

–JunctionTemperatureRange–40°Cto125°C

terminationwithV

DDQ

minof1.35V.Thedevice

containsahigh-speedoperationalamplifiertoprovide

•1.35VMinimumV

DDQ

excellentresponsetoloadtransients.Theoutput

•SourceandSinkCurrent

stagepreventsshootthroughwhiledelivering1.5A

•LowOutputVoltageOffset

continuouscurrentandtransientpeaksupto3Ain

theapplicationasrequiredforDDR-SDRAM

•NoExternalResistorsRequired

termination.TheLP2998alsoincorporatesa

•LinearTopology

VSENSEpintoprovidesuperiorloadregulationand

•SuspendtoRam(STR)Functionality

aV

REF

outputasareferenceforthechipsetand

DIMMs.

•LowExternalComponentCount

•ThermalShutdown

AnadditionalfeaturefoundontheLP2998isan

activelowshutdown(SD)pinthatprovidesSuspend

2Applications

ToRAM(STR)functionality.WhenSDispulledlow

theV

TT

outputwilltri-stateprovidingahigh

•DDR1,DDR2,DDR3,andDDR3LTermination

impedanceoutput,but,V

REF

willremainactive.A

Voltage

powersavingsadvantagecanbeobtainedinthis

•AutomotiveInfotainment

modethroughlowerquiescentcurrent.

•FPGA

DeviceInformation

(1)

•Industrial/MedicalPC

PARTNUMBERPACKAGEBODYSIZE(NOM)

•SSTL-18,SSTL-2,andSSTL-3Termination

LP2998SOPowerPAD™(8)4.89mmx3.90mm

•HSTLTermination

LP2998SOIC(8)4.90mmx3.91mm

LP2998-Q1SOPowerPAD™(8)4.89mmx3.90mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

4SimplifiedSchematic

1

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

Produktspecifikationer