Output filters for power supply design
Your output filter response should basically be the 20 dB/decade response of the capacitor.

The ESR zero will depend on the number and type of capacitors you're using. It's the natural corner frequency formed by the effective ESR and total capacitance:

\$ F_z = \dfrac{1}{2 \pi \times R_{esr} \times C_{out}} \$

The gain slope will swing more positive at the zero, and you'll see the phase changing as well. You can easily use a free SPICE simulator like LTSpice IV to model the output precisely (with ESRs, ESLs, etc.) and generate a Bode plot.