Patent ID: 8638136

Claim:
A switching voltage regulator start-up system, comprising: an on-chip voltage regulator integrated with an on-chip digital logic circuit, said on-chip voltage regulator associated with an off-chip inductor and a capacitor to provide a core supply voltage with respect to said on-chip digital logic circuit; a clock less start-up circuit that automatically operates said on-chip voltage regulator in a start-up mode in order to maintain an equilibrium voltage supply with respect to said on-chip digital logic circuit, wherein said clock less start-up circuit provides a soft start-up operation with respect to said on-chip voltage regulator without a clock signal; a first flip-flop circuit and a second flip-flop circuit of operates in a RESET state until said power-on-reset circuit toggles; and a first gate signal controlling a gate of a p-channel transistor switch and a second gate signal controlling a gate of a n-channel transistor switch are high and low respective causing said regulator output to be in a high impedance state.