"PSP converter" is ambiguous—it usually refers to one of three things:
Converts videos (MP4, AVI, MKV, etc.) to PSP-compatible format (MP4 / H.264 / AAC, 480x272 or 720x480).
Hardware cables that let you play PSP on a TV:
You cannot convert PSP games (ISO/CSO/EBOOT) to run on other platforms (PC, Android, PS Vita) via a simple converter. Emulation (PPSSPP) runs the original files natively—no conversion needed.
Clarify your goal (watch video on PSP, play PSP on TV, or something else) for a precise answer.