1.5A DDR Termination Regulator with Shutdown Pin - LP2996A

LP2996A (ACTIVE)

1.5A DDR Termination Regulator with Shutdown Pin

 

Description

The LP2996A linear regulator is designed to meet the JEDEC SSTL-2 specifications for termination of DDR-SDRAM. The device also supports DDR2, DDR3 and DDR3L VTT bus termination with VDDQ min of 1.35V. The device contains a high-speed operational amplifier to provide excellent response to load transients. The output stage prevents shoot through while delivering 1.5A continuous current and transient peaks up to 3A in the application as required for DDR-SDRAM termination. The LP2996A 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 LP2996A 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.

Features

  • 1.35V 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
  • LP2998/8Q recommended for
    –40°C to 125°C

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Parametrics Compare all products in DDR Memory Power Solutions

 
DDR Memory Type
Control Mode
Iout VTT (Max) (A)
Iq (Typ) (mA)
Output
Vin (Min) (V)
Vin (Max) (V)
Features
Rating
Operating Temperature Range (C)
Pin/Package
LP2996A LP2996-N LP2997 LP2998
DDR
DDR2
DDR3
DDR3L   
DDR
DDR2   
DDR2    DDR
DDR2
DDR3
DDR3L   
N/A    N/A    N/A    N/A   
1.5    1.5    0.5    1.5   
0.32    0.32    0.32    0.32   
VREF
VTT   
VREF
VTT   
VREF
VTT   
VREF
VTT   
1.35    1.8    1.8    1.35   
5.5    5.5    5.5    5.5   
Shutdown Pin for S3    Shutdown Pin for S3    Shutdown Pin for S3    Shutdown Pin for S3   
Catalog    Catalog    Catalog    Catalog   
0 to 125    0 to 125    0 to 125    -40 to 125   
8SO PowerPAD    16WQFN
8SO PowerPAD
8SOIC   
8SO PowerPAD
8SOIC   
8SO PowerPAD
8SOIC   

WEBENCH® Designer LP2996A

DDR type
  Range
Ambient Temp  °C 0 to 85°C