[FAQ] How to design the COMP pin components for TPS922055 / TPS922054 / TPS922053 / TPS922052?

Below are some theoretical tips and explanations on how to design the COMP pin components for TPS922055 / TPS922054 / TPS922053 / TPS922052 (A screen capture of the datasheet is shown below as a graphical reference):

• You can calculate the loop bandwidth with this equation: bandwidth = g_M(ea) / (2 * π * C_COMP). You can find g_M(ea) in Section 7.5 from the datasheet.
• The R_COMP is used to add a zero to the loop response. You can calculate this with f_zero = 1 / (2 * π * C_COMP * R_COMP).
• The usage of R_DAMP is illustrated in Section 9.2.1.2.5 from the datasheet.
• The C_COMP necessary. The R_COMP and R_DAMP is optional. Normally R_COMP = 0ohm works for most working conditions. (Normally you do not need to add a zero in most working conditions.)

Please be noticed that those are all theoretical calculations and can just be used as a reference. You should design and adjust the components based on your test results.