SLVSB64I November 2011 – March 2018 TPS65217
The setpoint of the output voltage for the DC/DC converters is determined in one of two different ways. The first way is as a fixed-voltage converter where the voltage is defined in the DEFDCDCx register. The second way is an external resistor network. Set the XADJx bit in the DEFDCDCx register and use Equation 1 to calculate the output voltage.
TI recommends selecting values to keep the combined resistance of the R1 and R2 resistors less than 1 MΩ. Shield the VDCDC1, VDCDC2, and VDCDC3 lines from switching nodes and from the L1, L2, and L3 inductors to prevent coupling of noise into the feedback pins.