xDot power requirements

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  • October 7, 2016 at 8:31 am #15004
    Andrew Lindsay
    Participant

    Hi,

    I’m currently working on a design using the xDot and need some clarification on voltages in the datasheet. It says Operating voltage is 2.4V to 3.57V. What is the absolute maximum voltage? I’m currently using 3.6V batteries in a mDot design and would like to continue using these without having to add a voltage regulator if the xDot is going to be OK with 3.6V.

    thanks

    Andrew

    October 7, 2016 at 9:31 am #15006
    Tom Swanson
    Blocked

    Hi Andrew,

    The xDot’s absolute maximum operating voltage is 3.6V. This absolute maximum is limited by the absolute maximum of several of the onboard parts, including the STM32L151 microcontroller.

    Can you tell me more about the batteries that you plan to use? Is 3.6V the nominal voltage, or is it the maximum, fully-charged voltage? If the maximum voltage of your batteries could exceed 3.6V, I would recommend adding an LDO voltage regulator to protect the xDot. Even if 3.6V is the maximum voltage, it would be a good idea to include an LDO just to provide a safety margin.

    Tom

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