https://devzone.nordicsemi.com/f/nordic-q-a/126800/mcuboot-drawing-around-6maOur application built for nRF54L05 draws approximately 70 &#181;A on our custom board when entering system ON sleep (idle). However, when MCUboot is enabled , the same firmware draws approximately 6 mA in system on sleep. In addition to the increased currenten-USTelligent Community 13Mon, 02 Feb 2026 05:52:14 GMThttps://devzone.nordicsemi.com/thread/560069?ContentTypeID=1Mon, 02 Feb 2026 05:52:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3b4990aa-06b0-4fcf-8255-3062042c7967Akshay<p>Hi Turbo,</p> <p><span>Adding <code data-start="113" data-end="130">CONFIG_SERIAL=n</code> in <code data-start="134" data-end="148">mcuboot.conf</code> resolved both issues. Even though the boot banner was disabled, the UART remained active in MCUboot, which was causing the problem. Thanks for the help.<br /><br />regards,</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/560055?ContentTypeID=1Sat, 31 Jan 2026 14:03:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d408e584-2a60-4694-9bf2-24c12756e345Turbo J<p>Check mcuboot in the build folder. It may have pulled dts or config settings that you were not aware off.</p> <p>Note that mcuboot does not see anything you set in application prj.conf file - so it very likely has boot banners still enabled.</p><div style="clear:both;"></div>