Sept 28 - Fitch Ratings has affirmed the 'AAA' ratings assigned to the senior unsecured notes and 'AA' ratings assigned to the mandatory redeemable preferred shares (MRPS) issued by the following closed-end funds managed by Tortoise Capital Advisors, LLC (Tortoise): --Tortoise Energy Infrastructure Corporation (NYSE: TYG); --Tortoise Energy Capital Corporation (NYSE: TYY); --Tortoise MLP Fund, Inc. (NYSE: NTG); --Tortoise Pipeline & Energy Fund (NYSE: TTP). A full list of ratings follows at th