This part is a kind of semiconductor called LT1085-05-220M.

Function of this product has LOW DROPOUT 3 AMP POSITIVE VOLTAGE REGULATOR.

Manufacturers : Seme LAB

Image and pinout :

Some of the text within the PDF file :

LT1085–220M–05 LT1085–05–220M LT1085–12–220M MILITARY VERSION TO–220 Isolated Metal Package 10.41 10.67 4.70 5.00 0.70 0.90 3.56 Dia. 3.81 10.41 10.92 LOW DROPOUT 3 AMP POSITIVE VOLTAGE REGULATOR FEATURES • • • • • • • Low Dropout Performance Fixed or Adjustable Voltages Fixed Output Voltages of 5V & 12V Output Current 3A Line Regulation 0.015% / V Typical. Load Regulation 0.1% Typical. Military Temperature Range (–55 to +150°C) 16.38 16.89 13.39 13.64 1 2 3 12.70 19.05 0.89 1.14 2.54 BSC 2.65 2.75 BLOCK DIAGRAM VIN Pinouts Pin 1 2 3 Fixed Adjustable GROUND ADJUST OUTPUT OUTPUT INPUT INPUT Case is ISOLATED THERMAL LIMIT Ordering Information LT1085–220M LT1085–05–220M LT1085–12–220M Positive Adjustable Regulator Fixed +5V Regulator Fixed +12 [ ... ]

LT1085-05-220M PDF Datasheet Download