The maximum allowable current sense resistor value is limited by both the current limit and subharmonic stability. These two limitations are given by Equation 49 and Equation 50.
The current limit requires a resistor less than 14.2 mΩ, and stability requires a sense resistor less than 133 mΩ. A 10-mΩ resistor is selected. Approximately 2-mΩ of routing resistance is added in compensation calculations.