SLVSAH5E December 2010 – May 2019 TPS57114-Q1
For the example design, the selection for R6 is 100 kΩ. Using Equation 33, calculate R7 as 80 kΩ. The nearest standard 1% resistor is 80.5 kΩ.
Due to the internal design of the TPS57114-Q1 device, there is a minimum output voltage limit for any given input voltage. The output voltage can never be lower than the internal voltage reference of 0.8 V. Above 0.8 V, an output voltage limit may exist due to the minimum controllable on-time. In this case, Equation 34 gives the minimum output voltage
There is also a maximum achievable output voltage, which is limited by the minimum off-time. Equation 35 gives the maximum output voltage.