SLVSHL0B June 2024 – July 2024 TPSM81033
ADVANCE INFORMATION
The output voltage is set by an external resistor divider (R1, R2 in Figure 7-1). When the output voltage is regulated, the typical voltage at the FB pin is VREF. Thus the resistor divider is determined by Equation 2.
where
For the best accuracy, keep R2 smaller than 300kΩ to ensure the current flowing through R2 is at least 100 times larger than the FB pin leakage current. Changing R2 towards a lower value increases the immunity against noise injection. Changing the R2 towards a higher value reduces the quiescent current for achieving highest efficiency at low load currents.