Linear regulator with a low series voltage drop
AssigneeSTMicroelectronics S.r.l.
InventorNicolas Marty
Life of this patent
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Abstract
A linear regulator of the type including a power MOS transistor of a first channel type, controlled by an amplifier having an output stage including, between two supply terminals, a resistor and a first MOS control transistor of a second channel type. The regulator further includes a start-up circuit having a switchable resistor in parallel on said first resistor.
Claims11
A linear regulator including a power MOS transistor of a first channel type, controlled by an amplifier having an output stage including, between two supply terminals, a first resistor and a first MOS control transistor of a second channel type, further including a start-up circuit having a switchable resistor in parallel with said first resistor.
A method for controlling a linear regulator formed of a power MOS transistor and of a regulation amplifier having an output stage including, in series between two supply terminals, a resistor and a MOS control transistor of channel type opposite to that of the power MOS transistor, including decreasing the value of said resistor upon start-up of the regulator.
Dependencies are inferred from the claim text.