Design of high-efficiency digital-control multi-topology step-down switched capacitor converter

Author

Melikyan Vazgen, Sh. ; Galstyan Vache, A.

Author_Institution

Dept. of Microelectron. Circuits & Syst., State Eng. Univ. of Armenia, Yerevan, Armenia

fYear

2015

fDate

21-24 April 2015

Firstpage

42

Lastpage

45

Abstract

This paper presents a multi-topology step-down switched-capacitor (SC) converter with a novel digital control. The feedback control system performs digital control over operating frequency and topology of the converter to efficiently modify the SC configuration depending on actual current load as well as required output voltage. The feedback is designed without the usage of reference voltages which provides easy integration of proposed SC converter in digital systems. The converter achieves maximal efficiency of 88%, while providing a wide range of load current and low level of output voltage ripple. Due to the multi-topology structure, high efficiency is provided over 1.3V of input voltage. The converter is designed in 28nm CMOS process using the proposed technique.

Keywords

CMOS integrated circuits; digital control; electric current control; feedback; power convertors; switched capacitor networks; voltage control; CMOS process; SC configuration; actual current load; digital control; digital systems; feedback control system; load current; multi-topology step-down switched-capacitor converter; output voltage ripple; size 28 nm; voltage 1.3 V; Clocks; Frequency conversion; Switches; Switching circuits; Topology; Voltage control; ADC; CMOS; digital-control; frequency modulation; power-converter;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics and Nanotechnology (ELNANO), 2015 IEEE 35th International Conference on

Conference_Location

Kiev

Type

conf

DOI

10.1109/ELNANO.2015.7146831

Filename

7146831