Bypass mode for voltage regulators

US10048710B2 · kind B2 · utility

Assignee

• Dialog Semiconductor (UK) Limited · GB

Inventors

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

Key dates

• Filing date: May 23, 2016
• Grant date: Aug 14, 2018
• Expiry date: May 23, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G05F1/575
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A voltage regulator which provides at an output node a load current at an output voltage is described. The voltage regulator comprises a pass transistor for providing the load current at the output node from an input node, and a driver stage configured to set the gate voltage of the pass transistor based on a drive current. The voltage regulator has voltage regulation means to set the drive current 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 voltage regulator has bypass regulation means to set the drive current in dependence of an indication of the gate-to-source voltage at the pass transistor and in dependence of a target voltage for the gate—to activate the voltage regulation means and/or the bypass regulation means. source voltage. The voltage regulator also comprises mode selection means.