Answer:
MAX3280EAUK+ 5-pin SOT23
Package Code U5+2
Thermal impedance:
Single-layer board, worst case scenario
Theta jA = 324.30°C/W
Theta jC = 82°C/W
Multi-layer board, worst case scenario
Theta jA = 255.90°C/W
Theta jC = 81°C/W