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  • Case ID: 107515
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NRF51822 DCDC design

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image descriptionNRF51822 supply voltage is 3V battery. When I design principle diagram, I have a question. Both AVDD and VCC_nRF are connect with the battery's positive?image description

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    Hi,

    When using DC/DC the AVDD pin should be connected to output of the DC/DC, i.e. AVDD to AVDD, and VCC_nRF to positive battery. This can be seen in the reference layout.

    Best of luck, Øyvind

  • 0 in reply to Øyvind Karlsen

    thanks ,my device use DC-DC mode.i find the question. Useing DC-DC and LDO mode,Same board and tx power,LDO mode transmission distance is 90 meters,but DC-DC mode transmission distance is 45 meters.Can you tell me why?how solve it?

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  • 0 in reply to Øyvind Karlsen

    thanks ,my device use DC-DC mode.i find the question. Useing DC-DC and LDO mode,Same board and tx power,LDO mode transmission distance is 90 meters,but DC-DC mode transmission distance is 45 meters.Can you tell me why?how solve it?

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