Integrated Linear Regulator for GaN-based Gate Driver Applications

Ting Chieh Lin, Chin Hsia

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Scopus citations

Abstract

GaN transistors with low input and output capacitance and zero reverse recovery characteristics enable efficient operation in half-bridge and bridge-based power drivers. Integrating GaN power transistors and their drivers in a single chip solves a number of challenges using GaN devices, which monolithically integrate all power stages to design low cost and high power density power converters. An internal regulator is generally required in such a power converter application. The regulator has a variety of functions, including a voltage source that provides a regulated voltage before the power driver starts up, and a power supply for external devices such as digital isolators for the high side driver signals. This paper presents a GaN-based linear regulator applied to power converter applications. All linear components use GaN devices as building blocks. The regulator consists of two common-source differential stages in a cascaded fashion to provide a high voltage conversion gain, as well as sufficient phase margins to reduce instability caused by rapid load transitions. The overall regulator was implemented in a GaN-on-Si process with maximum input and output voltages of 20 V and 6 V, respectively, at cost of 250 µA quiescent current. The regulator can source a maximum load current of 150 mA with the line regulation of 17 mV/V and the load regulation of 0.67 mV/mA. The maximum output voltage variation for a load current step change of 150 mA is within 400 mV. More than 65 dB PSRR above 1 MHz is achieved with the design.

Original languageEnglish
Title of host publication2019 IEEE 4th International Future Energy Electronics Conference, IFEEC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728131535
DOIs
StatePublished - 11 2019
Externally publishedYes
Event4th IEEE International Future Energy Electronics Conference, IFEEC 2019 - Singapore, Singapore
Duration: 25 11 201928 11 2019

Publication series

Name2019 IEEE 4th International Future Energy Electronics Conference, IFEEC 2019

Conference

Conference4th IEEE International Future Energy Electronics Conference, IFEEC 2019
Country/TerritorySingapore
CitySingapore
Period25/11/1928/11/19

Bibliographical note

Publisher Copyright:
© 2019 IEEE.

Keywords

  • GaN
  • GaN-based Power Converter Applications
  • Linear Regulator

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