Fully integrated switched-capacitor voltage converter with regulated output

Valery E. Shunkov, Oleg N. Kus, Vitaly Y. Prokopyev, Vladimir A. Butuzov, Yury I. Bocharov

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

1 Citation (Scopus)

Abstract

The paper presents the integrated circuit (IC) of the inductorless switched-mode DC-DC voltage converter. The converter is based on a novel multiphase switched-capacitor architecture. It uses reconfigurable charge-pump circuits and a multiloop discrete and continuous time control technique. The control unit performs a converter topology selection, a value of switched capacitors selection as well as a conversion frequency regulation. The chip also comprises a built-in low-dropout linear regulator. The on-chip reference of 1.0 V is powered by a PSRR-enhancing pre-regulator. The core of bandgap reference uses a dynamic threshold voltage MOSFET (DTMOS) transistors instead of generally used diode-connected vertical p-n-p bipolar transistors. The IC has been implemented in a commercially available 180 nm CMOS technology with five metal layers and stacked metal-insulator-metal capacitors. It is intended for use as a standalong IC for converting power rail voltages or lithium electrochemical cell voltages 2.8 V-5.5 V conversion into power supply voltages 1.2 V-3.3 V of the modern microcontrollers and other low-voltage ICs. It also may be used as a embedded IP block of a system-on-chip. The paper discusses features of regulation in a multiphase system over a wide range of input and output voltages and load currents. It also presents the results of the IC samples evaluation.

Original languageEnglish
Title of host publicationMoscow Workshop on Electronic and Networking Technologies, MWENT 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-4
Number of pages4
Volume2018-March
ISBN (Electronic)9781538634974
DOIs
Publication statusPublished - 12 Apr 2018
Event1st Moscow Workshop on Electronic and Networking Technologies, MWENT 2018 - Moscow, Russian Federation
Duration: 14 Mar 201816 Mar 2018

Conference

Conference1st Moscow Workshop on Electronic and Networking Technologies, MWENT 2018
CountryRussian Federation
CityMoscow
Period14.03.201816.03.2018

Keywords

  • charge-pump circuit
  • CMOS technology
  • DC-DC voltage converter
  • feedback control system
  • integrated circuit
  • linear regulator
  • multiphase system
  • switched capacitor circuit
  • switched mode power supply

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