https://devzone.nordicsemi.com/f/nordic-q-a/125077/using-npm1300-with-fixed-dc-input-no-usbHi, I&#39;m looking to use the nPM1300 with a fixed 5V DC input (no USB). I still want to use the rest of the nPM1300 features together with an MCU, including lithium battery charging, fuel gauging, buck regulators, but my circuit will be powered off aen-USTelligent Community 13Wed, 22 Oct 2025 06:51:23 GMThttps://devzone.nordicsemi.com/thread/552119?ContentTypeID=1Wed, 22 Oct 2025 06:51:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4c4a2b12-636e-4cb9-b57d-cc1ddc80e5cachris_h<p>Thank you, that perfectly answers my question!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/551905?ContentTypeID=1Mon, 20 Oct 2025 09:23:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:403956bc-5dc2-4c64-9d69-c29a3a580cc6Tomi Koskela<p>Hello,</p> <p>1. You can leave then floating</p> <p>2. No communication is needed between nPM1300 and the USB host. The CC lines can be used to detect the USB host max current capability, but even then it is not automatic, you can read the detected value in the register and SoC&nbsp;can set the VBUSINLIM accordingly through TWI. So you can just set the VBUS current limit to the desired value with&nbsp;TWI write when the 5V adapter is plugged. Note the default is 100mA, so that is the maximum you can draw from the 5V supply with the default setting. You can program it up to 1500mA.</p><div style="clear:both;"></div>