The output current range of the circuit is determined by the equation shown in the configuration. Keep in mind that the VREF equals to 2.500 V. When choosing the sense resistor RS, it needs to generate 2.500 V for the TL43xLI-Q1 when IO reaches the target current. If the overhead voltage of 2.500 V is not acceptable, consider lower voltage reference devices such as the TLV43x-Q1 or TLVH43x-Q1.
The output current accuracy is determined by both the accuracy of the ATL43xLI-Q1 chosen, as well as the accuracy of the sense resistor RS. The internal virtual reference voltage of ATL43xLI-Q1 is within the range of 2.500 V ±(0.5% or 1.0%), depending on which version is being used. Another consideration for the output current accuracy is the temperature coefficient of the ATL43xLI-Q1 and RS. Refer to the for the specification of these parameters.