Electronic Components Datasheet Search |
|
LTC3868EGN-1 Datasheet(PDF) 1 Page - Linear Technology |
|
LTC3868EGN-1 Datasheet(HTML) 1 Page - Linear Technology |
1 / 38 page LTC3868-1 38681fb Typical applicaTion FeaTures applicaTions DescripTion Low IQ, Dual 2-Phase Synchronous Step-Down Controller High Efficiency Dual 8.5V/3.3V Step-Down Converter n Low Operating IQ: 170µA (One Channel On) n Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 14V n Wide VIN Range: 4V to 24V n RSENSE or DCR Current Sensing n Out-of-PhaseControllersReduceRequiredInput CapacitanceandPowerSupplyInducedNoise n OPTI-LOOP®CompensationMinimizesCOUT n Phase-LockableFrequency(75kHzto850kHz) n ProgrammableFixedFrequency(50kHzto900kHz) n SelectableContinuous,Pulse-Skippingor BurstMode®OperationatLightLoads n VeryLowDropoutOperation:99%DutyCycle n AdjustableOutputVoltageSoft-Start n PowerGoodOutputVoltageMonitor n OutputOvervoltageProtection n OutputLatchoffProtectionDuringShortCircuit n LowShutdownIQ:8µA n InternalLDOPowersGateDrivefromVINorEXTVCC n NoCurrentFoldbackDuringStart-Up n Small4mm ×5mmQFNandNarrowSSOPPackages n NotebookandPalmtopComputers n PortableInstruments n BatteryOperatedDigitalDevices n DistributedDCPowerSystems Efficiency and Power Loss vs Load Current TheLTC®3868-1isahighperformancedualstep-down switchingregulatorcontrollerthatdrivesallN-channel synchronouspowerMOSFETstages.Aconstantfrequency currentmodearchitectureallowsaphase-lockablefre- quencyofupto850kHz.Powerlossandnoiseduetothe inputcapacitorESRareminimizedbyoperatingthetwo controlleroutputsoutofphase. The170μAno-loadquiescentcurrentextendsoperating lifeinbatterypoweredsystems.OPTI-LOOPcompensa- tionallowsthetransientresponsetobeoptimizedover awiderangeofoutputcapacitanceandESRvalues.The LTC3868-1featuresaprecision0.8Vreferenceandapower goodoutputindicator.Awide4Vto24Vinputsupplyrange encompassesawiderangeofintermediatebusvoltages andbatterychemistries. Independentsoft-startpinsforeachcontrollerrampthe outputvoltagesduringstart-up.Currentfoldbacklimits MOSFETheatdissipationduringshort-circuitconditions. Theoutputshort-circuitlatchofffeaturefurtherprotects thecircuitinshort-circuitconditions. Foraleadless32-pinQFNpackagewiththeadditionalfea- turesofadjustablecurrentlimit,clockout,phasemodula- tionandtwoPGOODoutputs,seetheLTC3868datasheet. 0.1µF 62.5k 3.3µH 680pF 150µF 4.7µF 22µF 50V 0.007Ω 20k 15k VOUT1 3.3V 5A 150µF 0.1µF 193k 7.2µH 680pF 0.01Ω 20k 15k VOUT2 8.5V 3.5A TG1 TG2 BOOST1 BOOST2 SW1 SW2 BG1 BG2 SGND PGND SENSE1+ SENSE2+ SENSE1– SENSE2– VFB1 VFB2 ITH1 ITH2 VIN INTVCC SS1 SS2 VIN 9V TO 24V 38681 TA01 0.1µF 0.1µF LTC3868-1 L ,LT,LTC,LTM,BurstMode,OPTI-LOOP,µModule,LinearTechnologyandtheLinearlogo areregisteredtrademarksandNoRSENSEandUltraFastaretrademarksofLinearTechnology Corporation.Allothertrademarksarethepropertyoftheirrespectiveowners.ProtectedbyU.S. Patents,including5481178,5705919,5929620,6100678,6144194,6177787,6304066,6580258. OUTPUT CURRENT (A) 0.0001 40 50 60 70 80 0.001 0.01 0.1 1 10 38681 TA01b 30 20 10 0 90 100 10 100 1000 1 0.1 10000 EFFICIENCY POWER LOSS VIN = 12V VOUT = 3.3V FIGURE 12 CIRCUIT |
Similar Part No. - LTC3868EGN-1 |
|
Similar Description - LTC3868EGN-1 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |