When nRF52840 is powerd by USB, can I use the DECUSB pin as a 3.3V power supply?https://devzone.nordicsemi.com/f/nordic-q-a/53171/when-nrf52840-is-powerd-by-usb-can-i-use-the-decusb-pin-as-a-3-3v-power-supplyen-USTelligent Community 13Mon, 14 Oct 2019 12:13:04 GMTRE: When nRF52840 is powerd by USB, can I use the DECUSB pin as a 3.3V power supply?https://devzone.nordicsemi.com/thread/214825?ContentTypeID=1Mon, 14 Oct 2019 12:13:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8b8f61f6-11ea-4a54-9f14-e3f835b10997haakonsh<p>Yes, as long as you adhere to&nbsp;<a title="Regulator specifications, REG0 stage" href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/power.html?cp=3_0_0_4_2_7_1#unique_1179047869">Regulator specifications, REG0 stage</a>.&nbsp;</p><div style="clear:both;"></div>RE: When nRF52840 is powerd by USB, can I use the DECUSB pin as a 3.3V power supply?https://devzone.nordicsemi.com/thread/214777?ContentTypeID=1Mon, 14 Oct 2019 09:37:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:30831b7d-5621-48b0-a0f5-799926954dd8ndc_bee<p><img alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/VDDOUTPUT.png" /></p> <p>I see the VDD output can be configured to 3.3V, now my question is can I use this 3.3V as a power supply for external sensor and MCU?</p><div style="clear:both;"></div>RE: When nRF52840 is powerd by USB, can I use the DECUSB pin as a 3.3V power supply?https://devzone.nordicsemi.com/thread/214772?ContentTypeID=1Mon, 14 Oct 2019 09:20:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:eddc9037-36d9-4253-ba87-8c66eb13e0c7ndc_bee<p>Are you mean 5V USB supply to VDDH,then the VDD voltate can be configured to 3.3V, then I can use this 3.3V as a power supply for sensor or MCU?</p><div style="clear:both;"></div>RE: When nRF52840 is powerd by USB, can I use the DECUSB pin as a 3.3V power supply?https://devzone.nordicsemi.com/thread/214753?ContentTypeID=1Mon, 14 Oct 2019 08:42:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:76fd8c11-c03e-4279-a542-28dda9256473haakonsh<p>No, you cannot use the decoupling pin as a power supply.&nbsp;</p> <p>What you can do is connect the 5V USB supply to VDDH and configure it to supply 3.3V to VDD. See also&nbsp;<a title="Regulator specifications, REG0 stage" href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/power.html?cp=3_0_0_4_2_7_1#unique_1179047869">Regulator specifications, REG0 stage</a>.&nbsp;</p><div style="clear:both;"></div>RE: When nRF52840 is powerd by USB, can I use the DECUSB pin as a 3.3V power supply?https://devzone.nordicsemi.com/thread/214717?ContentTypeID=1Mon, 14 Oct 2019 01:32:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:74f1a97a-4e3f-4901-b9f9-538c94b17279ndc_bee<p>PCB area is not enough, if DECUSB can be used as 3.3V power supply, it will be very helpful.</p> <p>It can power USB signalling interface, theoretically it can power a sensor or a MCU?</p> <p>or its current load capacity is not enough?</p><div style="clear:both;"></div>RE: When nRF52840 is powerd by USB, can I use the DECUSB pin as a 3.3V power supply?https://devzone.nordicsemi.com/thread/214675?ContentTypeID=1Sat, 12 Oct 2019 18:12:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:09437ff7-5aa3-42a1-9614-6373108c0762Dmitry<p><span>It&#39;s designed to power USB signalling interface.. why not to put an external&nbsp;</span><span>$0.05 LDO?</span></p><div style="clear:both;"></div>RE: When nRF52840 is powerd by USB, can I use the DECUSB pin as a 3.3V power supply?https://devzone.nordicsemi.com/thread/214660?ContentTypeID=1Sat, 12 Oct 2019 10:36:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a1255164-01c6-4a22-8512-68a0d231322dndc_bee<p>Can I use the DECUSB pin as a 3.3V power supply to power up a sensor or something esle?</p><div style="clear:both;"></div>