Voltage regulator circuit and corresponding device

• Main Author: RIZZO AUDREY
• Format: Patent
• Language: Chinese; English
• Published: 09.04.2024
• Subjects: CONTROLLING; PHYSICS; REGULATING; SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES

A circuit includes a supply node that receives a supply voltage; an output node providing a regulated voltage; a start-up circuitry coupled to the power supply node circuitry; a current generator circuitry coupled to the activation circuitry and generating a current circuitry; a bandgap node coupled to the bandgap circuitry to receive a bandgap voltage; a multiplier circuitry coupled to the bandgap node and the current generator circuitry to receive the current and apply scaling to the current; a first transistor providing a threshold voltage drop across the first transistor node and the second transistor node; a first resistive element interposed between the first transistor and the bandgap node; a second resistive element coupled between ground and a second node of the first transistor; and an operational amplifier that receives a pre-regulated voltage as a function of the bandgap voltage, a threshold voltage across the first transistor, and a voltage drop across the first resistive element and the second r