TOP223 "Ct" capacitor

Hello

Using TOP223, and we're a little confused about what value to use for Ct, and whether to include a series resistor. I haven't found anything in the datasheet outlining how to calculate the value (unless I missed it). The schematics there indicate in one case to not use a resistor, and in another case to use it, along with a 47uF cap value.

We've tried no resistor with both 47uF and at the extreme other end, 0.1uF. Both seem to work well. The behavior of auto-restart mode is not all that important to us, as a current limited supply is located after this switching supply.

Are there published guidelines on what resistor/capacitor value combination to use, other than the value shown in the datasheet schematics?