LDO regulator slash Supervisor IC question(s)

Hello

Anyone know of a device that acts as an LDO (3v3 preferred) and as a supervisory IC in one? Im looking for something that could do the job of activating itself at a prescribed voltage threshold and doing the regulating work itself. I recognize that I could use an exterior supervisory IC for an LDO with an EN pin, but just polling here. Also, does anyone know of a supervisory IC that has a lockout function that needs to be power cycled in order to reset?

Muchas Grac
S