It is easy to check the voltage reference accuracy in the regulator’s datasheet. Usually the front page of the datasheet shows the initial accuracy, which is room temperature performance. To get a better idea of the full temperature accuracy performance, the specification table of the datasheet will reveal the information. The example shown here shows that the 0.6 V reference is 1% accurate over the entire input voltage range and temperature range. The 1% full temperature reference accuracy indicates very good performance, comparatively speaking. A more accurate reference will help the power solution to meet the total regulation accuracy requirement. Choosing tighter tolerance resistor dividers will also help improve the accuracy of the regulator. The 0.1% resistors will cost more than 1% resistors. Resistor networks have even higher accuracy by trimming and matching temperature characteristics, but may require a special order. Improvement in voltage accuracy may bring peace of mind, and the cost delta is low compared to the total cost of the DC/DC converter solution.