Paper Info
Title
Switched-Capacitor Based Buck Converter Design Using Current Limiter for Better Efficiency and Output Ripple
Abstract
In this paper we are addressing power efficiency and output ripple of an embedded switched-capacitor based DC/DC Buck Converters. Here we propose to use current pump based switched-capacitor circuit in buck converter. The current pump circuit limits transition current of the switched-capacitors and hence, improves power efficiency and reduces output ripple. We have also proposed an equivalent macro model of this type of current pump based switched-capacitor converter which would help to get a better essence of the closed loop stability of the system and would reveal clearly trade-offs among load current, flying capacitance and clock frequency. A transistor level implementation of the proposed buck converter in 0.18µ technology is provided. For a load current of 8mA (maximum)the achieved power efficiency is 72.7% and the output ripple is 27mV. The flying capacitors in the converter are 2x108pF and the load capacitor is 125pF.
Year
DOI
Venue
2009
10.1109/VLSI.Design.2009.43
VLSI Design
Keywords
Field
DocType
current pump circuit limit,current pump,proposed buck converter,output ripple,buck converter design,switched-capacitor converter,current limiter,power efficiency,load capacitor,better efficiency,embedded switched-capacitor,load current,buck converter,topology,switched capacitor,transistors,logic gates,clock frequency,switches,capacitors
Boost converter,Capacitor,Computer science,Forward converter,Ćuk converter,Electronic engineering,Current limiting,Ripple,Buck converter,Buck–boost converter
Conference
ISSN
Citations 
PageRank 
1063-9667
1
0.38
References 
Authors
1
2
Name
Order
Citations
PageRank
Tamal Das1749.59
Pradip Mandal28423.04