HM1615

1  EFFICIENCY(%)MicropowerStep-UpDC/DCConvertersinThinSOT   FEATURES ■LowQuiescentCurrent:20μAinActiveMode1μAinShutdownMode■OperateswithVINasLowas1V■LowVCESATSwitch:250mVat300mA■UsesSmallSurfaceMountComponents■HighOutputVoltage:Upto34V■LowProfile(1mm)ThinSOTTMPackage APPLICATIOS ■LCDBias■HandheldComputers■BatteryBackup■DigitalCamerasDESCRIPTION TheHM1615/HM1615-1aremicropowerstep-upDC/DCconvertersina5-leadlowprofile(1mm)ThinSOTpack-age.TheHM1615isdesignedforhigherpowersystemswitha350mAcurrentlimitandaninputvoltagerangeof1.2Vto15V,whereastheHM1615-1isintendedforlowerpowerandsingle-cellapplicationswitha100mAcurrentlimitandanextendedinputvoltagerangeof1Vto15V.Otherwise,thetwodevicesarefunctionallyequivalent.Bothdevicesfeatureaquiescentcurrentofonly20μAatnoload,whichfurtherreducesto0.5μAinshutdown.Acurrentlimited,fixedoff-timecontrolschemeconservesoperatingcurrent,resultinginhighefficiencyoverabroadrangeofloadcurrent.The36Vswitchallowshighvoltageoutputsupto34Vtobeeasilygeneratedinasimpleboosttopologywithouttheuseofcostlytransformers.TheHM1615’slowoff-timeof400nspermitstheuseoftiny,lowprofileinductorsandcapacitorstominimizefootprintandcostinspace-consciousportableapplications.     TYPICALAPPLICATIO      VIN2.5VTO4.2V1-CellLi-Ionto20VConverterforLCDBias L110µHD1    20V12mA  85 80VIN=4.2V75EfficiencyVINSW HM1615R12MC21µF 70VIN=2.5VVIN=3.3V C14.7µFSHDNFBGND65R2130k60 C1:TAIYOYUDENLMK316BJ475C2:TAIYOYUDENTMK316BJ105D1:MOTOROLAMBR0530L1:MURATALQH3C100K2455 500.10.3   131030LOADCURRENT(mA)HM1615ShenzhenH&MSemiconductorCo.Ltdhttp：//  ORDERPARTNUMBERHM1615ES5HM1615ES5-1HM1615IS5S5PARTMARKING  TOPVIEW SW15VINGND2FB34SHDN S5PACKAGE5-LEADPLASTICSOT-23 TJMAX=125°C,θJA=256°C/WYTIZYTKHYTXZ ABSOLUTEAXIURATIGS(Note1) VIN,SHDNVoltage...................................................15VSWVoltage..............................................................36VFBVoltage.................................................................VINCurrentintoFBPin.................................................1mAJunctionTemperature...........................................125°COperatingTemperatureRange(Note2)..–40°Cto85°CStorageTemperatureRange.................–65°Cto150°CLeadTemperature(Soldering,10sec)..................300°CPACKAGE/ORDERIFORATIO   ConsultLTCMarketingforpartsspecifiedwithwideroperatingtemperatureranges.   ELECTRICALCHARACTERISTICSThe●denotesthespecificationswhichapplyoverthefulloperatingtemperaturerange,otherwisespecificationsareatTA=25°C.VIN=1.2V,VSHDN=1.2Vunlessotherwisenoted. PARAMETERCONDITIONSMINTYPMAXUNITSMinimumInputVoltageHM1615-1HM1615 1.01.2VVQuiescentCurrentNotSwitchingVSHDN=0V 20301μAμAFBComparatorTripPoint ●1.2051.231.255VFBComparatorHysteresis  8mVOutputVoltageLineRegulation1.2VVIN12V 0.050.1%/VFBPinBiasCurrent(Note3)VFB=1.23V●3080nASwitchOffTimeVFB1VVFB0.6V 4001.5nsμsSwitchVCESATISW=70mA(HM1615-1)ISW=300mA(HM1615) 85120250350mVmVSwitchCurrentLimitHM1615-1HM1615 75100125300350400mAmASHDNPinCurrentVSHDN=1.2VVSHDN=5V 23812μAμASHDNInputVoltageHigh  0.9VSHDNInputVoltageLow  0.25VSwitchLeakageCurrentSwitchOff,VSW=5V 0.015μA Note1:AbsoluteMaximumRatingsarethosevaluesbeyondwhichthelifeofadevicemaybeimpaired.Note2:TheHM1615EandHM1615E-1areguaranteedtomeetperformancespecificationsfrom0°Cto70°C.Specificationsoverthe–40°Cto85°Coperatingtemperaturerangeareassuredbydesign,characterizationandcorrelationwithstatisticalprocesscontrols.TheHM1615Iisguaranteedtomeetperformancespecificationsoverthe–40°Cto85°Coperatingtemperaturerange.Note3:BiascurrentflowsintotheFBpin.HM1615ShenzhenH&MSemiconductorCo.Ltdhttp：//  YT1YTOUTBIASCURRENT(nA)SWITCHVOLTAGE(V)SWITCHOFFTIME(ns)PEAKCURRENT(mA)FEEDBACKVOLTAGE(V)SHUTDOWNPINCURRENT(µA)QUIESCENTCURRENT(µA) TYPICALPERFORACECHARACTERISTICS     0.60 0.55 0.50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10SwitchSaturationVoltage(VCESAT)     ISWITCH=500mA   ISWITCH=300mA   1.25  1.24  1.23  1.22  1.21  1.20FeedbackPinVoltageandBiasCurrent    VOLTAGE   CURRENT   5025  4023  3021  2019  1017  015 QuiescentCurrent  VFB=1.23VNOTSWITCHING    VIN=12V VIN=1.2V–50–250255075100TEMPERATURE(°C)–50–250255075100TEMPERATURE(°C)–50–250255075100TEMPERATURE(°C)    550 500 450 400SwitchOffTime       VIN=1.2V VIN=12V  400 350 300 250 200 150SwitchCurrentLimit VIN=12V VIN=1.2VPJ615ShutdownPinCurrent 25  20  15 25°C10100°C350 300 250 100 50 0PJ1615-1VIN=12V VIN=1.2V5 0–50–250255075100TEMPERATURE(°C)–50–250255075100TEMPERATURE(°C)051015SHUTDOWNPINVOLTAGE(V)     PIFUCTIOS SW(Pin1):SwitchPin.ThisisthecollectoroftheinternalNPNpowerswitch.Minimizethemetaltraceareacon-nectedtothispintominimizeEMI. GND(Pin2):Ground.Tiethispindirectlytothelocalgroundplane. FB(Pin3):FeedbackPin.SettheoutputvoltagebyselectingvaluesforR1andR2(seeFigure1):   SHDN(Pin4):ShutdownPin.Tiethispinto0.9Vorhighertoenablethedevice.Tiebelow0.25Vtoturnoffthedevice. VIN(Pin5):InputSupplyPin.Bypassthispinwithacapacitorasclosetothedeviceaspossible. VR1=R2−11.23HM1615ShenzhenH&MSemiconductorCo.Ltdhttp：//  YT BLOC