https://devzone.nordicsemi.com/f/nordic-q-a/55162/ble---high-current-peak-40maDear Nordic Support, I&#39;m working on a custom board, containing the NRF52840. I am using SDK 15.3.0 and SoftDevice s140 to implement BLE. Recently I&#39;ve bought the Power Profiler Kit (PCA63511) in order to measure the current consumption and calculateen-USTelligent Community 13Mon, 06 Jan 2020 09:10:32 GMThttps://devzone.nordicsemi.com/thread/227605?ContentTypeID=1Mon, 06 Jan 2020 09:10:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:36b0d479-8f35-4d47-9342-9f77154d2e91Snail Feng<p>Hello, is it normal to reach 40MA? No other peripherals started</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/223429?ContentTypeID=1Tue, 03 Dec 2019 20:12:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:051e7b79-fac6-4aea-9596-bdb34303c70fHenrico<p>Hi Turbo J,</p> <p>Thanks for the answer, you&#39;re right. I did not know that that table existed.</p> <p>I also thought that the BLE examples or the SoftDevice would automatically enable the DC/DC switching regulator, but this is not the case. So after enabling it with the &#39;sd_power_dcdc_set()&#39; function, it dropped to around 15mA.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/223409?ContentTypeID=1Tue, 03 Dec 2019 16:33:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ad99fb76-76d9-4cc2-9f08-dbebc86d0a90Turbo J<p>Is DC/DC switching regulator off? Tx current at 8dBm is specified a 32.7mA typical, and that is just for the RADIO peripherial. (see PS 1.1 table 60.20.15.2).</p> <p>For comparison: 4dBm is at 21.4mA, 0dBm is at 10.6mA current.</p> <p>The 40ish mA is likely the sum of RADIO plus MCU core plus clock tree.</p><div style="clear:both;"></div>