https://devzone.nordicsemi.com/f/nordic-q-a/128837/regarding-the-startup-current-of-the-nrf54l-bootloaderHi, I am developing a program for the nRF54L15 with the DFU bootloader enabled. I would like to reduce the startup current. I am using SDK 3.2.4. The `sysbuild.conf` settings are as follows. SB_CONFIG_BOOTLOADER_MCUBOOT =y SB_CONFIG_BOOT_SIGNATURE_KEY_FILEen-USTelligent Community 13Tue, 04 Aug 2026 00:00:55 GMThttps://devzone.nordicsemi.com/thread/569832?ContentTypeID=1Tue, 04 Aug 2026 00:00:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d2910b95-0a52-4d3d-a8b4-131a597bd29ftalby<p>Dear Simon</p> <p>Thank you for your reply.</p> <p><span>Upon further investigation, it appears that the startup current of the nRF54L is significantly influenced by the SDK version, even when no bootloader is present.</span></p> <p><span class="jCAhz ChMk0b"><span class="ryNqvb">Here is a comparison of the startup current for `peripheral_lbs`.</span></span></p> <p><span class="jCAhz ChMk0b"><span class="ryNqvb"> `prj_minimal.conf` is being used.</span></span></p> <p><span class="jCAhz ChMk0b"><span class="ryNqvb">V2.9.1</span></span></p> <p><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/peripheral_5F00_lbs_5F00_2.9.1_5F00_1.png.png" alt=" " /></p> <p>V3.2.4</p> <p><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/peripheral_5F00_lbs_5F00_3.2.4_5F00_1.png.png" alt=" " /></p> <p>V3.4.0</p> <p><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/peripheral_5F00_lbs_5F00_3.4.0_5F00_1.png.png" alt=" " /></p> <p><span>Although we have not yet investigated the bootloader specifically, the fact that the current varies depending on the SDK suggests that a software-based solution is possible.</span><br />We plan to update our project to V3.4.0 in the future.</p> <p>but we are hoping to achieve current levels comparable to those seen in V2.9.1.</p> <p>Best regards,</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/569806?ContentTypeID=1Mon, 03 Aug 2026 12:58:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a95ddf00-09e8-4cb0-8093-5339bb4ec289Simonr<p>Hi</p> <p>Sorry about the late reply here. I am currently looking into whether the start-up current consumption can be lowered further, but haven&#39;t found anything as of yet. I expect to have more of an answer for you by early next week at the latest. Thank you for your patience.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>