SLUSE25 September 2020 – MONTH TPS563207
The output voltage is set with a resistor divider from the output node to the FB pin. TI recommends using 1% tolerance or better divider resistors. Start by using Equation 1 to calculate VOUT.
To improve efficiency at very light loads, consider using larger value resistors. Too high of resistance will be more susceptible to noise and voltage errors from the FB input current will be more noticeable.