For this design example, V_OUT is set to 3.3 V. Equation 11 and Equation 12 set the feedback divider resistors for the desired output voltage:

For improved output accuracy, use Equation 12 and I_FB = 50 nA as listed in the Electrical Characteristics table to calculate the upper limit for series feedback resistance (R₁ + R₂ ≤ 660 kΩ).

The control-loop error amplifier drives the FB pin to the same voltage as the internal reference (V_FB = 0.8 V, as listed in the Electrical Characteristics table). Use Equation 11 to determine the ratio of R₁ / R₂ = 3.125. Use this ratio and solve Equation 12 for R₂. Now calculate the upper limit for R₂ ≤ 160 kΩ. Select a standard value resistor for R₂ = 160 kΩ.

Reference Equation 11 and solve for R₁:

From Equation 13, R₁ = 500 kΩ can be determined. Select a standard value resistor for R₁ = 499 kΩ. V_OUT = 3.3 V (as determined by Equation 11).