Minimized transient and steady-state cross regulation in 55nm CMOS single-inductor dual-output (SIDO) step-down DC-DC converter

Author

Lee, Yu-Huei ; Huang, Tzu-Chi ; Yang, Yao-Yi ; Chen, Ke-Horng ; Lin, Ying-Hsi ; Chou, Wen-Shen ; Huang, Chen-Chih ; Chen, Yi-Kuang

Author_Institution

Inst. of Electr. Control Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

fYear

2010

fDate

8-10 Nov. 2010

Firstpage

1

Lastpage

4

Abstract

A single-inductor dual-output (SIDO) step-down converter with continuous conduction mode (CCM) control is proposed for high efficiency system-on-a-chip (Soc) integration. The cross regulation in steady-state output voltage ripple, which is rarely mentioned, is effectively reduced as well as in transient response. The low-voltage energy distribution controller (LV-EDC) circuit guarantees good voltage regulation and low output voltage ripple simultaneously. In addition, within the allowable output voltage ripple, the automatic energy bypass (AEB) mechanism can reduce the number of energy delivery path to decrease the switching loss. Two outputs are operated with the load-dependent energy path for improving the power conversion efficiency. The chip fabricated in 55 nm CMOS achieves 91 % peak efficiency, low output voltage ripple, and excellent load transient response.

Keywords

CMOS integrated circuits; DC-DC power convertors; system-on-chip; voltage control; CMOS single-inductor dual-output; DC-DC converter; automatic energy bypass; continuous conduction mode control; low-voltage energy distribution controller; size 55 nm; steady-state cross regulation; system-on-a-chip; voltage regulation; voltage ripple; Inductors; Power conversion; Steady-state; System-on-a-chip; Transient response; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid State Circuits Conference (A-SSCC), 2010 IEEE Asian

Conference_Location

Beijing

Print_ISBN

978-1-4244-8300-6

Type

conf

DOI

10.1109/ASSCC.2010.5716558

Filename

5716558