It seems there is no simulation model for Pspice for LT6275. So, will the one in LTSpice work in Pspice? Or may ADI provide one for us, or some docs to port it to Pspice?
Unfortunately, we don't have a LT6275 spice model that is compatible with Pspice. The model of LT6275 is solely created for LTspice use only.
Just curious, why do you prefer to simulate it using Pspice wherein you can readily simulate it in LTspice which is free to download and easy to use?
Could you check ADA4637? drawback is not so low power, 7mA supply current compared to almost 2mA for LT6275.
G=10 is flat at 1MHz, supply voltage is up to 30V and output voltage is 25Vpp typical.
Slew rate is quite high at 170V/us but not on the range of LT6275 which is 2200V/us.