An integrated circuit formed on a semiconductor substrate and configured
to accommodate higher voltage devices and low voltage devices therein. In
one embodiment, the integrated circuit includes a transistor having a
gate located over a channel region recessed into a semiconductor
substrate, and a source/drain including a lightly doped region located
adjacent the channel region and a heavily doped region located adjacent
the lightly doped region. The transistor also includes an oppositely
doped well located under and within the channel region. The transistor
still further includes a doped region, located between the heavily doped
region and the oppositely doped well, having a doping concentration
profile less than a doping concentration profile of the heavily doped
region. The integrated circuit also includes a driver switch of a driver
formed on the semiconductor substrate.