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Product details

Parameters

DDR memory type DDR, DDR2, DDR3, DDR3L Control mode Iout VTT (Max) (A) 1.5 Iq (Typ) (mA) 0.32 Output VREF, VTT Vin (Min) (V) 1.35 Vin (Max) (V) 5.5 Features Shutdown Pin for S3 Rating Automotive Operating temperature range (C) -40 to 125 open-in-new Find other DDR memory power ICs

Package | Pins | Size

HSOIC (DDA) 8 19 mm² 4.9 x 3.9 open-in-new Find other DDR memory power ICs

Features

  • AEC-Q100 Test Guidance with the following results
    (SO PowerPAD-8):
    • Device HBM ESD Classification Level H1C
    • Junction Temperature Range –40°C to 125°C
  • 1.35 V Minimum VDDQ
  • Source and Sink Current
  • Low Output Voltage Offset
  • No External Resistors Required
  • Linear Topology
  • Suspend to Ram (STR) Functionality
  • Low External Component Count
  • Thermal Shutdown
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Description

The LP2998 linear regulator is designed to meet JEDEC SSTL-2 and JEDEC SSTL-18 specifications for termination of DDR-SDRAM and DDR2 memory. The device also supports DDR3 and DDR3L VTT bus termination with VDDQ min of 1.35 V. The device contains a high-speed operational amplifier to provide excellent response to load transients. The output stage prevents shoot through while delivering 1.5 A continuous current and transient peaks up to 3 A in the application as required for DDR-SDRAM termination. The LP2998 also incorporates a VSENSE pin to provide superior load regulation and a VREF output as a reference for the chipset and DIMMs.

An additional feature found on the LP2998 is an active low shutdown (SD) pin that provides Suspend To RAM (STR) functionality. When SD is pulled low the VTT output will tri-state providing a high impedance output, but, VREF will remain active. A power savings advantage can be obtained in this mode through lower quiescent current.

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Technical documentation

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Type Title Date
* Datasheet LP2998/LP2998-Q1 DDR Termination Regulator datasheet (Rev. K) Aug. 20, 2014
User guide AN-1813 LP2998 Evaluation Board (Rev. A) May 07, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
10
Description

The LP2998 evaluation board is designed to provide the design Engineer with a fully functional prototype system in which to evaluate the LP2998 in both a static environment and with a complete memory system.

Reference designs

REFERENCE DESIGNS Download
Automotive Cluster Wide Vin Power Supply Design
TIDA-00275 This TI reference design is an automotive cluster wide Vin power supply solution that includes a wide Vin buck converter with an integrated LDO.   Also includes a highly efficient synchronous step-down, dc-dc converter. Along with a linear regulator designed to meet JEDEC SSTL-2 and JEDEC (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options

Ordering & quality

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