Voltage regulator with drive voltage dependent on reference voltage

US10248145B2 · kind B2 · utility

Assignee

• Dialog Semiconductor (UK) Limited · GB

Inventors

• Dan Ciomaga · Ingolstadt, DE
• Mihail Jefremow · Augsburg, DE
• Stephan Drebinger · Munich, DE
• Fabio Rigoni · Karlsfeld, DE

Key dates

• Filing date: Feb 21, 2018
• Grant date: Apr 2, 2019
• Expiry date: Feb 21, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G05F1/468
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A voltage regulator to provide a load current at an output node is presented. The voltage regulator has a pass transistor for providing the load current at the output node from an input node. The voltage regulator contains a driver stage to set a gate voltage at a gate of the pass transistor based on a drive voltage at a gate of a drive transistor. The voltage regulator has voltage regulation means to set the drive voltage in dependence of an indication of the output voltage at the output node and in dependence of a reference voltage for the output voltage. The driver stage has the drive transistor and a diode transistor, wherein the diode transistor forms a current mirror with the pass transistor. The driver stage has a current amplifier amplifies a drive current through the drive transistor to provide an amplified current through the diode transistor.