I'm trying to model the transfer function of the TPS61088. The datasheet gives a suggested procedure to calculate values at a single output voltage, but as I'm operating over a range of output voltages in my application I want to make sure the phase and gain margins are good for all of them.
The uncompensated response is given on page 17 of the datasheet:
No problems there. However, I'm having trouble with the compensator transfer function:
No expressions are given to calculate f_comz, f_comp1, and f_comp2. Additionally, the amplifier output resistance (Rea) is missing from the datasheet, and only one of the two parameters required to calculate it is given (Rea = DC gain / gm, but only gm is given). Where would I find this information?