LP2997 Series

DDR-II Termination Regulator

Catalog

DDR-II Termination Regulator

Part	Current - Supply	Mounting Type	Applications	Voltage - Supply [Max]	Voltage - Supply [Min]	Package / Case	Package / Case [y]	Package / Case [x]	Supplier Device Package	Operating Temperature [Max]
Texas Instruments LP2997M/NOPB	320 µA	Surface Mount	DDR-II Terminator	5.5 V	2.2 V	8-SOIC	3.9 mm	0.154 in	8-SOIC	125 °C
Texas Instruments LP2997MR/NOPB	320 µA	Surface Mount	DDR-II Terminator	5.5 V	2.2 V	8-PowerSOIC	3.9 mm	0.154 in	8-SO PowerPad	125 °C
Texas Instruments LP2997MRX/NOPB	320 µA	Surface Mount	DDR-II Terminator	5.5 V	2.2 V	8-PowerSOIC	3.9 mm	0.154 in	8-SO PowerPad	125 °C
Texas Instruments LP2997MR	320 µA	Surface Mount	DDR-II Terminator	5.5 V	2.2 V	8-PowerSOIC	3.9 mm	0.154 in	8-SO PowerPad	125 °C
Texas Instruments LP2997M	320 µA	Surface Mount	DDR-II Terminator	5.5 V	2.2 V	8-SOIC	3.9 mm	0.154 in	8-SOIC	125 °C

Catalog

DDR-II Termination Regulator

Key Features

• Source and Sink CurrentLow Output Voltage OffsetNo External Resistors RequiredLinear TopologySuspend to Ram (STR) FunctionalityLow External Component CountThermal ShutdownAvailable in SOIC-8, SO PowerPAD-8 PackagesAll trademarks are the property of their respective owners.Source and Sink CurrentLow Output Voltage OffsetNo External Resistors RequiredLinear TopologySuspend to Ram (STR) FunctionalityLow External Component CountThermal ShutdownAvailable in SOIC-8, SO PowerPAD-8 PackagesAll trademarks are the property of their respective owners.

Description

The LP2997 linear regulator is designed to meet the JEDEC SSTL-18 specifications for termination of DDR-II memory. The device contains a high-speed operational amplifier to provide excellent response to load transients. The output stage prevents shoot through while delivering 500mA continuous current and transient peaks up to 900mA in the application as required for DDR-II SDRAM termination. The LP2997 also incorporates a VSENSEpin to provide superior load regulation and a VREFoutput as a reference for the chipset and DIMMs. An additional feature found on the LP2997 is an active low shutdown (SD) pin that provides Suspend To RAM (STR) functionality. WhenSDis pulled low the VTToutput will tri-state providing a high impedance output, but, VREFwill remain active. A power savings advantage can be obtained in this mode through lower quiescent current. The LP2997 linear regulator is designed to meet the JEDEC SSTL-18 specifications for termination of DDR-II memory. The device contains a high-speed operational amplifier to provide excellent response to load transients. The output stage prevents shoot through while delivering 500mA continuous current and transient peaks up to 900mA in the application as required for DDR-II SDRAM termination. The LP2997 also incorporates a VSENSEpin to provide superior load regulation and a VREFoutput as a reference for the chipset and DIMMs. An additional feature found on the LP2997 is an active low shutdown (SD) pin that provides Suspend To RAM (STR) functionality. WhenSDis pulled low the VTToutput will tri-state providing a high impedance output, but, VREFwill remain active. A power savings advantage can be obtained in this mode through lower quiescent current.