Integrated circuit chips with on-chip supply regulators with programmability and initialization. In one embodiment, an integrated circuit, includes: an initialization circuit to assert an initialization signal during powering up of the integrated circuit; a control circuit coupled to the initialization circuit; and a power supply regulator coupled to the control circuit, the power supply regulator to provide a first voltage to the control circuit when the initialization signal is asserted, the power supply regulator to provide a second voltage to the control circuit according to a control signal from the control circuit when the initialization signal is not asserted. In one embodiment, the integrated circuit includes a digital television demodulator.