ANovelControl Technique forSingle-Inductor Multiple-Output DC-DCBuckConverters

Thispaper presents thedesign ofasingle-inductor coupled outputs ononeanother andtheir effects onload regulated multiple-output (SIMO)buckconverter withtransients. Moreoveracomplete closed loopconfiguration in interleaved switched capacitor outputs. A small signal analysis of this topology isalso notquite invogue. Mostshowtheoutput thebuckconverter usingstatespaceaveraging technique is switches being openloop controlled. carried out.A compensating network andnovel control logic are designed tominimize effects ofcross regulation andload transient Thisworkdiscusses aboutan on chipsingle inductor inthethree-coupled outputs. independently controlled triple output buckconverter and Inviewofthesignificant advantages ofcurrent-mode control showsa small signal analysis using "state space averaging" to overvoltage-mode themainswitch ofthismultiple-output theconverter andbrings outthecross regulation transfer converter ismadecurrent-controll ed. Interestingly, sub-harmonic functions, simultaneously anoptimal control scheme hasbeen oscillations start occurring atamuchlowerdutycycle than0.5in designed(6). Theexteral switches arevoltage controlled soas multiple-output current controlled converters. Ourworkfocuses onthecause ofinstability andtheminimumdutyratio beyondtotakecareofthecross-regulation effects whereas themain whichsub-harmonic oscillations occur. Lastly, theexpression ofa switch iscurrent controlled sothat theadvantages ofcurrent slope-compensating ramp,required toeliminate sub-harmonic mode canbe achieved. The circuit isimplemented and oscillations, hasbeenderived formultiple-output converters. The simulated inCadence analog environment in0.5uprocess transistor level design oftheabovehasbeendesigned and targeting DSLmodemapplication. simulated inCadence Analog Environment ina0.5uprocess. The simulation results areinconformity withtheevaluated stabilizingII.SINGLE INDUCTORTRIPLE OUPUTBUCKCONVERTER ramptoeliminate sub-harmonic oscillations. TOPOLOGY Theinput voltage isdenoted asvin andthethree respective