LP2998-Q1 DDR Termination Regulator for Automotive Applications | TI.com

LP2998-Q1
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DDR Termination Regulator for Automotive Applications

 

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.

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

WEBENCH® Designer LP2998-Q1

DDR type
  Range
Ambient Temp  °C -40 to 125°C

Parametrics

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Part number Order DDR memory type Control mode Iout VDDQ (Max) (A) Iout VTT (Max) (A) Iq (Typ) (mA) Output Vin (Min) (V) Vin (Max) (V) Features Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
LP2998-Q1 Order now DDR
DDR2
DDR3
DDR3L    
      1.5     0.32     VREF
VTT    
1.35     5.5     Shutdown Pin for S3     Automotive     -40 to 125     SO PowerPAD | 8     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)    
LP2996-N Order now DDR
DDR2    
      1.5     0.32     VREF
VTT    
1.8     5.5     Shutdown Pin for S3     Catalog     0 to 125     SO PowerPAD | 8
SOIC | 8
WQFN | 16    
8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
16WQFN: 16 mm2: 4 x 4 (WQFN | 16)    
LP2997 Order now DDR2           0.5     0.32     VREF
VTT    
1.8     5.5     Shutdown Pin for S3     Catalog     0 to 125     SO PowerPAD | 8
SOIC | 8    
8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)    
TPS51100 Order now DDR
DDR2
DDR3
DDR3L
LPDDR3    
S3
S5    
  3     0.5     VREF
VTT    
1.2     3.6     S3/S5 Support     Catalog     -40 to 85     HVSSOP | 10     10HVSSOP: 15 mm2: 4.9 x 3 (HVSSOP | 10)    
TPS51200 Order now DDR
DDR2
DDR3
DDR3L
DDR4
LPDDR2
LPDDR3    
D-CAP
S3
S4/S5    
  3     0.5     VREF
VTT    
1.1     3.5     S3/S5 Support     Catalog     -40 to 85     VSON | 10     10VSON: 9 mm2: 3 x 3 (VSON | 10)    
TPS51206 Order now DDR
DDR2
DDR3
DDR3L
DDR4
LPDDR2
LPDDR3    
      2     0.17     VREF
VTT    
1     3.5     S3/S5 Support     Catalog     -40 to 105     WSON | 10     10WSON: 4 mm2: 2 x 2 (WSON | 10)    
TPS53317 Order now DDR
DDR2
DDR3
DDR3L
DDR4
LPDDR2
LPDDR3    
D-CAP+
S3
S4/S5    
  6     0.32     VTT     1     6     Complete Solution     Catalog     -40 to 85     VQFN | 20