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TPS54A20 Frequency Setting Questions and stability in table 2

Other Parts Discussed in Thread: TPS548A20, TPS548A20EVM-737

The data sheet table in section 6.4 defines PWM frequency vs. a parameter called RRF. What is this parameter? Is it the divider ratio on the RF pin from VREF?There does not appear to be enough information in the DS to definitively select the operating frequency.

Table two on sheet 18 indicates that with Vout=0.6V, Cout_min, and 600KHz Fpwm, the cross over is 247KHz with phase margin of 70 degrees? I find that very hard to believe. Is this a typo?