Yes until last year IIT Madras is one of the only IIT which accepted the score of MAT exam for giving admission in their college. But this year no announcement has been made but probably it will continue accepting MAT marks. Along with IIT Delhi, it has also started giving admission to non-engineers students.

For IIT Madras the eligibility criteria are you need to have at least 60% in graduation for general category students and 55% for SC/ST students.

Parameters used by IIT Madras for giving admission to students are MAT score, Past academic performance, Work experience, Diversity and gender. MAT score again has around 55-60% weightage on the merit list. 

For engineering students MAT cut off is generally around 96+ percentile with diversity as a factor for you it is likely to fall around 92-93 percentile. You can again get a call with 95+ percentile but with 97+ percentile, you will have a better chance of conversion.

All the best!!