This part is a kind of semiconductor called AAT1011A.

Function of this product has 3-CHANNEL PC POWER SUPPLY SUPERVISOR.

Manufacturers : Advanced Analog Technology

Image and pinout :

Some of the text within the PDF file :

Advanced Analog Technology, Inc. AAT1011A 3-CHANNEL PC POWER SUPPLY SUPERVISOR FOR 3.3V, 5V AND 12V Features General Description z z z z z z z z z z z 3-Channel PC Power Supply Supervisor with Minimized External Components Over Voltage Protection for 3.3V / 5V / 12V Output Under Voltage Protection for 3.3V / 5V Output with 75 ms Enable Delay Fault Protection Output with Open Drain Output Open Drain Power Good Output 300 ms Power Good Delay 2.3 ms ONCTL to FPO Turn Off Delay The AAT1011 is a 3-channel power supply supervisor with 8KV ESD protection. It provides Over Voltage Protection (OVP), Under Voltage Protection (UVP), and Power Good Indicator to monitor and control the output of the switching power supply system. Remote function from external signal, i.e., On/O [ ... ]

AAT1011A PDF Datasheet Download