R_COMP, C_COMP and C_HF configure the error amplifier gain and phase characteristics to produce a stable voltage loop. For a quick start, follow the following four steps:

1. Select crossover frequency, f_C. Select the cross over frequency (f_C) at one fifth of the RHPZ frequency or one tenth of the switching frequency whichever is lower. RHPZ at minimum input voltage and maximum output voltage must be considered.
   Equation 66. $\frac{{\mathrm{f}}_{\mathrm{s}\mathrm{w}}}{10}=40\mathrm{k}\mathrm{H}\mathrm{z}$
   Equation 67. $\frac{{\mathrm{f}}_{\mathrm{R}\mathrm{H}\mathrm{P}\mathrm{Z}}}{5}=\frac{{\mathrm{R}}_{\mathrm{o}\mathrm{u}\mathrm{t}}\times {\mathrm{D}\mathrm{\text{'}}}^2}{{5\times 2\mathrm{\pi }\times \mathrm{L}}_{\mathrm{m}\_\mathrm{e}\mathrm{q}}}=1.6\mathrm{k}\mathrm{H}\mathrm{z}$

   Crossover frequency f_c=1.5kHz is selected .

2. Determine required R_COMP

   Knowing f_c, R_COMP is calculated as follows:

   Equation 68. ${\mathrm{R}}_{\mathrm{C}\mathrm{O}\mathrm{M}\mathrm{P}}=\frac{2\mathrm{\pi }\times {\mathrm{f}}_{\mathrm{c}}\times {\mathrm{C}}_{\mathrm{o}\mathrm{u}\mathrm{t}}\times {\mathrm{A}}_{\mathrm{c}\mathrm{s}}\times {\mathrm{R}}_{\mathrm{c}\mathrm{s}\_\mathrm{e}\mathrm{q}}}{\mathrm{D}\mathrm{\text{'}}\times {\mathrm{K}}_{\mathrm{F}\mathrm{B}}\times {\mathrm{g}}_{\mathrm{m}}}=\frac{2\mathrm{\pi }\times 1.6\mathrm{k}\mathrm{H}\mathrm{z}\times 600\mathrm{\mu }\mathrm{F}\times 10\times 0.75\mathrm{m}\mathrm{\Omega }}{0.2\times \frac{1}{30}\times 1\frac{\mathrm{m}\mathrm{A}}{\mathrm{V}}}=6.78\mathrm{k}\mathrm{\Omega }$

   A standard value of 6.8kΩ is selected for R_COMP

3. Determine C_COMP
   Place ω_{Z_EA} at the load pole frequency ω_{P_LF} to cancel load pole. Knowing R_COMP, C_COMP is calculated as follows:
   Equation 69. ${\mathrm{C}}_{\mathrm{C}\mathrm{O}\mathrm{M}\mathrm{P}}=\frac{1}{{\mathrm{R}}_{\mathrm{C}\mathrm{O}\mathrm{M}\mathrm{P}}\times {\mathrm{\omega }}_{\mathrm{P}\_\mathrm{L}\mathrm{F}}}=\frac{1}{6.8\mathrm{k}\mathrm{\Omega }\times \frac{2}{2.025\mathrm{\Omega }\times 600\mathrm{\mu }\mathrm{F}}}=89\mathrm{n}\mathrm{F}$
   A standard value of 100nF is selected for C_COMP
4. Determine C_HF.

   Place ω_HF at ω_RHPZ or ω_{Z_ESR} zero whichever is lower. Knowing R_COMP, RHPZ and ESR zero, C_HF is calculated as follows:

   Equation 70. ${\mathrm{C}}_{\mathrm{H}\mathrm{F}}=\frac{1}{{\mathrm{R}}_{\mathrm{C}\mathrm{O}\mathrm{M}\mathrm{P}}\times {\mathrm{\omega }}_{\mathrm{H}\mathrm{F}}}=\frac{1}{6.8\mathrm{k}\mathrm{\Omega }\times 49\mathrm{k}\mathrm{H}\mathrm{z}}=3\mathrm{n}\mathrm{F}$
   A standard value of 3.3nF is selected for C_HF.