DocumentCode :
1536874
Title :
A 450-mV Single-Fuel-Cell Power Management Unit With Switch-Mode Quasi- 
Hysteretic Control and Automatic Startup on 0.35-  for emerging applications powered by low-voltage single direct methanol fuel cell (DMFC). A subthreshold startup scheme and its circuit implementation are proposed to enable low-voltage self-startup feature. A boost switching converter with a switch-mode, quasi-V<sup>2</sup> hysteretic control is designed for power conditioning. The PMU is implemented on a standard 0.35-μm CMOS process with V<sub>TN</sub>/V<sub>TP</sub> of 0.55 V/ -0.75 V, respectively. Experimental results prove that the PMU automatically starts up with 450-mV single DMFC input. The output voltage of the PMU is well regulated with below 25 mV ripple. With an output power ranging from 20 to 200 mW, an average efficiency above 85.2% is obtained, with a maximum of 89.4%. Load transient recovery times are 11.6 μs/4.2 μs, respectively, in response to the step-up and step-down load changes between 10 and 100 mA.</div>
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<div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Keywords : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>CMOS integrated circuits; battery management systems; fuel cells; power convertors; CMOS process; DMFC; boost switching converter; direct methanol fuel cell; power 20 mW to 200 mW; single-fuel-cell power management unit; switch-mode quasi-V<sup>2</sup> hysteretic control; voltage 450 mV; Detectors; Inductors; Phasor measurement units; Ring oscillators; Switches; Voltage control; Direct methanol fuel cell (DMFC); power management unit (PMU); subthreshold self-startup scheme; switch-mode quasi-<formula formulatype=)
${rm V}^2$ hysteretic control (SMQH);
fLanguage :
English
Journal_Title :
Solid-State Circuits, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9200
Type :
jour
DOI :
10.1109/JSSC.2012.2197235
Filename :
6214993
Link To Document :
