TOLT is the TO-Leaded top-side cooling package within the TOLx family. With top-side cooling, the drain is exposed at the surface of the package allowing for 95 percent of the heat to be dissipated directly to the heatsink, achieving 20 percent better RthJA and 50 percent improved RthJC compared to the TOLL package. With bottom-side cooling packages, like the TOLL or the D2PAK, the heat is dissipated via the PCB to the heatsink resulting in high power losses.