Shripad Padmanabha Tirtha was a native of Uttara-Karnataka which in those days stretched to the area known as Andhra Pradesh. The exact time of Padmanabha Tirtha's appearance is not , but in Shri Chaitanya Charitamrta purport (Madhya-lil 9:245.) Shrila A.C. Bhaktivedanta Swami Prabhupad includes a section from the Bombay Gazzette that gives a date as being 1120. There is no mention of the dating system that is being used specifically for that date but, many of the other references are of Sakabja Era to which we need to add 79 years to get Chritian Era (A.D.) making the date 1199 A.D.
Both of the afore-mentioned state however, that Padmanabha Tirtha came from Uttara-Karnataka of the Telegu speaking people around the area where the Godavari River flows. His previous name in his 'purva-ashram' was Sobhana Bhatta, his initiation and subsequent change of name came upon meeting Madhwa when Madhwa returned to Udupi from his second northern tour. He (Sobhana Bhatta) was already a renowned and distinguished scholar of the day, but his proficiency in fourteen branches of learning were silenced in fourteen seconds by Acharya Madhwa in 1265 AD. In a very short time he became one of the most trusted disciples of Madhwa. Madhwa always praised him, being the senior-most disciple among those outside the Tulu area, and his learning, preaching capacity and seniority enabled Madhwa to make him the first to sit on the 'Pitha' after Madhwa's disappearance pastime.
Shripad Padmanabha Tirtha left this world at Navavrindavanas, near Hampi, on the sacred Tungabhadra River in 1324 AD. His 'samadhi' tomb remains there to this day.
Source : http://www.hknet.org.nz/gp-Padmanabha%20Tirtha.htm