1. Products
  2. Power Management
  3. Switching Regulators
  4. DDR/QDR Memory Bus Termination
  5. MAX1917


Features and Benefits

  • 25A Sourcing and Sinking Current
  • Automatically Sets VTT to 1/2VDDR
  • VTT and VTTR Within 1% of 1/2VDDR
  • Smallest Output Capacitors
  • 4.5V to 14V (or 28V with Resistor-Divider) Input Voltage Range
  • 1.5V to 3.6V Input DDR Range
  • 200kHz/300kHz/400kHz/550kHz Preset Switching Frequencies
  • Variable Switching Frequency of Up to 1MHz
  • Overcurrent Protection Without Current-Sense Resistor
  • Internal Soft-Start
  • VTTR Reference Sources and Sinks Up to 25mA
  • Quick-PWM Control for Fastest Loop Response
  • Up to 96% Efficiency
  • 16-Pin QSOP Package
  • Product Details

    The MAX1917 provides a complete power-management solution for DDR memory. It contains a synchronous buck controller and an amplifier to generate 1/2VDDR voltage for VTT and VTTR. The VTT and VTTR voltages are maintained within 1% of 1/2VDDR. The controller operates in synchronous rectification mode to ensure balanced current sourcing and sinking capability of up to 25A. With a shutdown current of less than 5µA, the MAX1917 is the best choice for low-power notebook applications, as well as servers and desktop computers. An all N-FET design optimizes efficiency. The MAX1917 can also be used for generating VDDR and as a general-purpose step-down controller with variable switching frequency as high as 1MHz with few additional components.

    The MAX1917 uses Maxim's proprietary Quick-PWM™ architecture for fast transient response up to 96% efficiency, and the smallest external components. Output current monitoring is achieved without sense resistors by monitoring the bottom FET's drain-to-source voltage. The current-limit threshold is programmable through an external resistor. The MAX1917 comes in a space-saving 16-pin QSOP package.


    • AGTL Bus Termination Supplies
    • Cell Phone Base Stations
    • DDR Memory Power Supplies
    • Desktop Computers
    • Networking Systems
    • Notebook Computers
    • Processor or DSP Core Supply
    • Storage

    Product Lifecycle icon-recommended Production

    At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

    Product Recommendations

    MAX1917 Companion Parts

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    Design Resources

    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    MAX1917EEE+ Material Declaration Reliability Data 16-QSOP-150_MIL
    MAX1917EEE+T Material Declaration Reliability Data 16-QSOP-150_MIL
    Wafer Fabrication Data MAX1917 Reliability Data

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