1. Products
  2. Power Monitor, Control, and Protection
  3. USB Power Switches
  4. MAX1931


Features and Benefits

  • 0.5A Guaranteed Output Current
  • Guaranteed 0.75A Short-Circuit Protection
  • 10ms Internal Fault-Blanking Timeout
  • No Fault Signal During Power-Up
  • Thermal Shutdown Protection
  • 2.7V to 5.5V Supply Range
  • 14µA Supply Current
  • Small 10-Pin µMAX Package
  • Product Details

    The MAX1931 is a current-limited, 60mΩ switch with built-in fault blanking. Its accurate preset current limit of 0.64A to 1.06A makes it ideally suited for USB applications. The device's low quiescent supply current (14µA) and shutdown current (1µA) conserve battery power in portable applications. The MAX1931 operates with inputs from 2.7V to 5.5V, making it ideal for both 3V and 5V systems.

    A fault signal notifies the microprocessor that the internal current limit has been reached. A 10ms fault-blanking feature allows momentary faults (such as those caused when hot-swapping into a capacitive load) to be ignored, thus preventing false alarms to the host system. This fault blanking also prevents a fault signal from being issued when the device is powering up.

    In the MAX1931, an output overcurrent condition causes the switch to current limit at 0.64A to 1.06A and active-low FAULT to go low after the 10ms blanking period. When the overcurrent condition is removed, active-low FAULT returns to its high-impedance state.

    The MAX1931 has several safety features to ensure that the USB port is protected. Built-in thermal overload protection limits power dissipation and junction temperatures. The device has an accurate internal current-limiting circuitry to protect the input supply against overload. The MAX1931 is available in a space-saving 10-pin µMAX package.


    • Battery Chargers
    • Docking Stations
    • Hot Plug-In Power Supplies
    • Notebook Computers
    • Portable Equipment
    • USB Ports and Hubs

    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.

    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
    MAX1931EUB+ Material Declaration Reliability Data 10-MINI_SO-N/A
    MAX1931EUB+T Material Declaration Reliability Data 10-MINI_SO-N/A
    Wafer Fabrication Data MAX1931 Reliability Data

    Sample & Buy

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    Buy Now Pricing

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    List Pricing

    (*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


    Lead Times

    Please see the latest communication from our CCO regarding lead times.



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