This part is a kind of semiconductor called MDD1501.

Function of this product has Single N-channel Trench MOSFET.

Manufacturers : MagnaChip

Image and pinout :

Some of the text within the PDF file :

MDD1501 – Single N-Channel Trench MOSFET 30V MDD1501 Single N-channel Trench MOSFET 30V, 67.4A, 5.6mΩ General Description The MDD1501 uses advanced MagnaChip’s MOSFET Technology, which provides high performance in on-state resistance, fast switching performance and excellent quality. MDD1501 is suitable device for DC to DC converter and general purpose applications. Features  VDS = 30V  ID = 67.4A @VGS = 10V  RDS(ON) (MAX) < 5.6mΩ @VGS = 10V < 8.6mΩ @VGS = 4.5V  100% UIL Tested  100% Rg Tested D G Absolute Maximum Ratings (Ta = 25oC) Drain-Source Voltage Gate-Source Voltage Characteristics Continuous Drain Current (1) Pulsed Drain Current Power Dissipation Single Pulse Avalanche Energy (2) Junction and Storage Temperature Range TC=25oC TC=70oC TA=25oC TA=7 [ ... ]

MDD1501 PDF Datasheet Download