This part is a kind of semiconductor called MDA0531E.

Function of this product has N-Channel Trench MOSFET.

Manufacturers : MagnaChip

Image and pinout :

Some of the text within the PDF file :

MDA0531E– Common-Drain N-Channel Trench MOSFET 30V MDA0531E Common-Drain N-Channel Trench MOSFET 30V, 8A, 19mΩ General Description The MDA0531E uses advanced MagnaChip’s MOSFET Technology, which provides low on-state resistance, high switching performance and excellent reliability. Low RDS(ON) and low gate charge operation with gate voltage as low as 2.5V. Features VDS = 30V ID = 8.0A @ VGS = 10V RDS(ON) < 19mΩ @ VGS = 4.5V < 20mΩ @ VGS = 4.0V < 22mΩ @ VGS = 3.8V < 25mΩ @ VGS = 3.1V < 31mΩ @ VGS = 2.5V Applications Unidirectional or Bi-directional Load Switch Lithium-Ion Battery Packs Portable Battery Protection Module Absolute Maximun Ratings (Ta = 25oC) Drain-Source Voltage Gate-Source Voltage Characteristics Continuous Drain Current Pulse Drain Current Power Diss [ ... ]

MDA0531E PDF Datasheet Download