Further tolerance analysis (value tolerance, temperature variation, and so on) and PCB designmargin should also be considered, so RSNS of 5 mΩ would be suitable with a 75-ppm temperaturecoefficient and power rating of 5 W.• The bq76930 is chosen, and so the REGSRC pin needs to be powered through a source followercircuit where the FET is used to provide current for REGSRC from the battery positive terminal whilereducing the voltage to a suitable value for the IC.