The schematics of PMP8571 shows that Rset for 3.3V and 1.5V are the same value of 1.74K while the RRT as 324K for TPS84320. Assuming that there is a typo somewhere but no of the value fit the datasheet. According to the TPS84320 datasheet, 1.5V need Rset to be 1.62 which agrees with the results from formula (1) while 3.3V should set Rset to 0.453K. Non of these values are close enough to 1.74k, which should set the output voltage to 1.46V. On the RRT side, according to the datasheet, the minimum frequency to cover 1.5-3.3V is 630Khz and it needs RRT to be 158K, which again is different from 324K as indicated on the reference design. Which document is correct?
Thanks
Jiliang