2A Bus Termination Voltage Regulator


The XRP2997 is a Double Data Rate (DDR) termination voltage regulator supporting all power requirements of DDR I, II and III memories and is capable of sinking or sourcing 2A continuously.

Tightly regulating its output voltage within ±20mV, the XRP2997 converts input voltages as low as 1.1V while the output voltage is adjustable through an external resistor divider or by forcing the VREF pin voltage. It maintains a fast line and load transient response and only requires an output capacitance of 22µF to operate. An enable function via an external MOSFET and a soft-start feature allow for a controlled implementation of power-up sequencing.

Built-in source/sink overcurrent, over temperature and undervoltage lockout protections insure safe operation under abnormal operating conditions.

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  • DDR1, DDR2 and DDR3 support
    • 0.75VTT generation
    • ±20mV output voltage offset
  • 2 Amps continuous current sourcing and sinking
    • 1.1V to 5.5V wide input voltage range
  • Adjustable output voltage
  • Suspend to RAM(STR), enable and soft-start functions
  • Stable with 22µF ceramic capacitor
  • UVLO, over temperature and overcurrent protections
  • Minimal external components
  • Pin/function compatible with Exar SP2996B
  • RoHS compliant "Green"/Halogen Free 8-pin SOIC (EP) package


  • DDR I/II/III memory termination
  • Active termination buses
  • Audio/video equipment
  • Video graphics cards

Design Tools


Pkg Code Details Quantities Dimensions PDF
  • JEDEC Reference: MS-012
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 59ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 2500
  • Quantity per Tube: n/a
  • Quantity per Tray: 98
  • Reel Size (Dia. x Width x Pitch): 330 x 12 x 4
  • Tape & Reel Unit Orientation: Pin 1 at sprocket hole.
  • Dimensions: mm
  • Length: 4.90
  • Width: 3.90
  • Thickness: 1.65 max.
  • Lead Pitch: 1.27

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
XRP2997IDBTR-F HSOIC8 -40 85 Active
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Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Distribution Date Description File
08/16/2012 Material change: Bond wire is changed from gold to copper. To update our manufacturing to be compatible with current industry standards and maintain capacity. PCN_12-0522-01-1033.pdf