SNAU288 December 2023 LMX1906-SP
Apply 3.3 V to the J23 header. The acceptable supply voltage range is 3.1 V to 3.5 V, and the board can draw up to 1.3 A during operation, so the resistance of the cable is matter. The on-board LDOs have about 40 mA ground current for converting 3.3 V to 2.5 V supply. Furthermore, enabling or disabling various system functions can change the board current by 50 % or more.