This part is a kind of semiconductor called AON6718.

Function of this product has 30V N-Channel MOSFET.

Manufacturers : Alpha & Omega Semiconductors

Image and pinout :

Some of the text within the PDF file :

AON6718 30V N-Channel MOSFET SRFET TM General Description Product Summary SRFETTM AON6718 uses advanced trench technology with a monolithically integrated Schottky diode to provide excellent RDS(ON),and low gate charge. This device is ideally suited for use as a low side switch in CPU core power conversion. VDS (V) = 30V ID = 80A RDS(ON) < 3.7mΩ RDS(ON) < 5mΩ (VGS = 10V) (VGS = 10V) (VGS = 4.5V) 100% UIS Tested 100% Rg Tested Top View DFN5X6 Bottom View PIN1 Top View 18 27 36 45 G D SRFETTM Soft Recovery MOSFET: Integrated Schottky Diode S Absolute Maximum Ratings TA=25°C unless otherwise noted Parameter Symbol Drain-Source Voltage VDS Gate-Source Voltage VGS Continuous Drain TC=25°C Current G TC=100°C Pulsed Drain Current C ID IDM Continuous Drain TA=25°C [ ... ]

AON6718 PDF Datasheet Download