Power supply issue

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  1. A:

    After the power on, the module responds to AT commands only for few seconds. The status led blinks but after about 10 seconds it seems the module switches off itself. Why?

     

    Q:

    About 10 seconds after the power-on or the insertion of the PIN code the
    module starts the location update procedure, transmitting its data to
    the network at the highest power level. During this phase the relative
    current peaks can be up to 2A. Therefore the power supply circuit has to
    be designed in order to withstand with these current peaks without big
    voltage drops; this means that both the electrical design and the board
    layout must be designed taking care about this information.
    Refer to the Hardware User Guide for different examples of power supply circuit design.