Hi Geoffrey, This link should help; http://kr.ic-on-line.cn/IOL/viewpdf/LM2575T-015_905484.htm Heat sink to the back and pins 1,3 & 5 bent forward. Regards, Nik On Nov 13, 4:20 pm, Geoffrey Reed <tre...@gmail.com> wrote: > Does the 2575 install in the same or opposite orientation as a 7805?