SLVUAP9B May 2016 – October 2021 TPS54302
1.3.3 Adjustable UVLO
The under voltage lock out (UVLO) can be adjusted externally using R4 and R5. The EVM is set for a start voltage of 6.74 V and a stop voltage of 5.83 V using R4 = 510 k? and R5 = 105 k?. Use Equation 4 and Equation 5 to calculate required resistor values for different start and stop voltages. For higher light-load efficiency, consider choosing a larger R4 and R5. Make adjustments to VSTART or VSTOP for a proper R4.
Equation 4. 
Equation 5. 
Ip = 0.7 μA, Ih = 1.55 μA, VENFALLING = 1.19 V and VENRISING = 1.22 V