Paper Info
Title
A dynamically reconfigurable NRTI switched-capacitor-based hybrid DC-DC converter suitable for embedded applications
Abstract
In this paper, a dynamically reconfigurable, Non-overlap Rotational Time Interleaved (NRTI) switched capacitor (S-C) DC-DC converter is presented. Its S-C module is reconfigurable to generate three different fractions (viz., 1/3, 1/2 and 2/3) of its input supply (Vdd). This maintains good power efficiency while its output voltage gets adjusted over a large range. In addition, a load-current-sensing circuit is integrated within it to dynamically reconfigure the S-C module based on the required driving capability. This feature enables to extend load current range to higher limit and at the same time improves the power efficiency in low load current regime. The S-C module is integrated with a current control loop for load and line regulation. The proposed architecture is simulated in a 0.18@mm CMOS process using dual oxide transistors to demonstrate the efficacy of the proposed topology. The input supply voltage is 3.3V and the regulated output range is 0.8-1.6V. Total flying capacitance is 330pF and the load capacitor value is 50pF. For an output of 1.35V, its power efficiency is maintained above 50% over a load current range of 4-17.6mA with a peak of 66% at 9mA. Throughout this current range the output voltage ripple remains within 12mV.
Year
DOI
Venue
2011
10.1016/j.mejo.2010.11.011
Microelectronics Journal
Keywords
Field
DocType
s-c module,hybrid dc-dc converter,load current range,current regime,low load,current range,power efficiency,current control loop,large range,regulated output range,dynamically reconfigurable,embedded application,load capacitor value,switched capacitor
Electrical efficiency,Boost converter,Capacitor,Forward converter,Ćuk converter,Electronic engineering,Switched capacitor,Engineering,Ripple,Constant power circuit
Journal
Volume
Issue
ISSN
42
2
Microelectronics Journal
Citations 
PageRank 
References 
0
0.34
10
Authors
2
Name
Order
Citations
PageRank
Kaushik Bhattacharyya1133.55
Pradip Mandal28423.04