Thermal vias underneath TopSwitch Posted by: T_A on Tue, 04/20/2021 Hi All, Return Path on my PCB uses internal layers. Do you advice adding thermal vias directly under the exposed pad of TopSwitch? As of now, my vias are on the outside side of the TopSwitch footprint, near Source pins. Log in or register to post comments Comments Hi, Let me know the package, power and part number. Thank you. Hi, Let me know the package, power and part number. Thank you.