There are few governments and private B.Tech institutes in Andhra Pradesh. Some government colleges are-

1. IIT Tirupati

2. Andhra University college of engineering, Visakhapatnam.

3. Jawaharlal Nehru Technological University (JNTUK), Kakinada.

Some private institutes are -

1. Koneru Lakshmaiah University, Guntur.

2. Vignan's Foundation for science technology and research, Guntur.

3. Velagapudi Ramakrishna Siddhartha Engineering College, Vijayawada.

If you need more information you can check here - https://engineering.careers360.com/colleges/ranking/top-engineering-colleges-in-andhra-pradesh