A Fully-Integrated 0.9W/mm2 79.1%-Efficiency 200MHz Multi-Phase Buck Converter with Flying-Capacitor-Based Inter-Inductor Current Balancing Technique

Jeong-Hyun Cho, Hong-Hyun Bae, Gyu-Wan Lim, Tae‐Hwang Kong, Jun‐Hyeok Yang, Hyun‐Sik Kim

20222022 IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits)10 citationsDOI

Abstract

This paper presents a fully-integrated (highly-integrated) 0.9W/mm 2 (1.01W/mm 2 ) 79.1% (81.4%)-efficiency 2-phase buck converter using on-chip (bond-wire) inductors and a 88.1%-efficiency 4-phase one with external components. They feature in-channel and inter-channel current self-balancing enabled by using flying-capacitor that is mainly aimed to lower the switching voltage. Also, the charge-recycling gate driver is proposed. The chips fabricated in a 55nm CMOS achieve a 45V/μs DVS rate and a transient slew rate of 9A/μs.

Topics & Concepts

InductorCapacitorCMOSBuck converterElectrical engineeringVoltageSlew rateMaterials scienceComputer scienceTransient (computer programming)PhysicsTopology (electrical circuits)OptoelectronicsEngineeringOperating systemAdvancements in Semiconductor Devices and Circuit DesignSemiconductor materials and devicesAnalog and Mixed-Signal Circuit Design

A Fully-Integrated 0.9W/mm<sup>2</sup> 79.1%-Efficiency 200MHz Multi-Phase Buck Converter with Flying-Capacitor-Based Inter-Inductor Current Balancing Technique

Abstract

Topics & Concepts