Linear regulator with a selectable output voltage
AssigneeSTMicroelectronics S.r.l.
InventorsNicolas Marty, Marco Cioci
Life of this patent
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Abstract
A control method and a linear regulator of the type including a power MOS transistor, controlled by a differential amplifier having a first input terminal receiving a reference voltage and a second input terminal receiving, via a switchable resistor circuit, the output voltage of the regulator, a smooth switching of the resistors being provided.
Claims9
A method for controlling a linear regulator including a power MOS transistor controlled by a differential amplifier having a first input terminal receiving a reference voltage and a second input terminal receiving, via a switchable resistor circuit, an output voltage of the linear regulator, said method comprising an act of:
- providing for a smooth switching of said switchable resistor circuit by applying at least one voltage ramp on at least one control terminal of a switching element of the switchable resistor circuit.
A linear regulator of the type including a power MOS transistor, controlled by a differential amplifier having an input terminal receiving, via a circuit of resistors switchable by means of MOS control transistors, a voltage proportional to the output voltage provided by the regulator, including at least two circuits for generating inverted ramps for controlling the respective gates of said control transistors.
Dependencies are inferred from the claim text.