TPS65130 具有正负（双路）输出的 800mA 升压电流用于 OLED 和 CCD 传感器24 QFN

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TPS6513xPositiveandNegativeOutputDC-DCConverter

1Features

1•2.7-Vto5.5-VInputVoltageRange

•DualAdjustableOutputVoltagesUpto15Vand

Downto–15V

•800-mATypicalSwitchCurrentLimitatBoostand

InverterMainSwitchesatTPS65130

•2-ATypicalSwitchCurrentLimitatBoostand

InverterMainSwitchesatTPS65131

•Upto89%EfficiencyatPositiveOutput

VoltageRail

•Upto81%EfficiencyatNegativeOutput

VoltageRail

•Power-SaveModeforHighEfficiencyatLowLoad

Currents

•IndependentEnableInputsforPower-Upand

Power-DownSequencing

•ControlOutputforExternalPFETtoSupport

CompletelyDisconnectingtheBattery

•Minimum1.25-MHzFixedFrequencyPWM

Operation

•ThermalShutdown

3Description

TheTPS6513xisdual-outputDC-DCconverter

generatingapositiveoutputvoltageupto15Vanda

negativeoutputvoltagedownto–15Vwithoutput

currentsina200-mArangeintypicalapplications,

dependingoninputvoltagetooutputvoltageratio.

Withatotalefficiencyupto85%,thedeviceisideal

forportablebattery-poweredequipment.Theinput

voltagerangeof2.7Vto5.5Vallowsthedevicesto

bepoweredfrombatteriesorfromfixed3.3-Vor5-V

supplies.TheTPS6513xcomesinasmall4-mm×4-

mmVQFN-24package.Togetherwithaminimum

switchingfrequencyof1.25MHz,thedeviceenables

designingsmallpowersupplyapplicationsbecauseit

requiresonlyafewsmallexternalcomponents.

TheconverteroperateswithafixedfrequencyPWM

controltopologyand,ifpower-savemodeisenabled,

itusesapulse-skippingmodeatlight-loadcurrents.It

operateswithonly500-µAdevicequiescentcurrent.

Independentenablepinsallowpower-upandpower-

downsequencingforbothoutputs.Thedevicehasan

internalcurrentlimitovervoltageprotectionanda

thermalshutdownforhighestreliabilityunderfault

conditions.

•OvervoltageProtectiononBothOutputs

DeviceInformation(1)

•1-µAShutdownCurrent

PARTNUMBERPACKAGEBODYSIZE(NOM)

•Small4-mmx4-mmVQFN-24Package(RGE)

TPS65130VQFN(24)4.00mm×4.00mm

2Applications

•LCDandOLEDDisplays

TPS65131VQFN(24)4.00mm×4.00mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

•IndustrialApplications

•DataAcquisition

•Audio

•General-PurposeSplit-RailSupplies

VI

Q1

TypicalApplicationSchematic

L1

4.7µH

D1

C1

4.7µF

R1

C9

VPOS

C4

22µF

INPVPOS

BSWFBP

VREF

R2

R4

C8

220nF

INN

VIN

FBN

R7

100

C2

4.7µF

C3

100nF

TPS65130/131

R3

C10

ENPVNEG

VNEG

PSPOUTN

ENN

PSN

AGND

CN

CP

PGND

C6

10nF

C7

4.7nF

D2

L2

4.7µH

C5

22µF

1

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

TPS65130,TPS65131

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TableofContents

1Features1

7.4DeviceFunctionalModes10

2Applications18ApplicationsandImplementation11

3Description1

8.1ApplicationInformation11

4RevisionHistory2

5PinConfigurationandFunctions3

6Specifications4

6.1AbsoluteMaximumRatings4

6.2ESDRatings4

6.3RecommendedOperatingConditions4

6.4ThermalInformation4

8.2TypicalApplication11

9PowerSupplyRecommendations24

10Layout24

10.1LayoutGuidelines24

10.2LayoutExample24

10.3ThermalConsiderations25

11DeviceandDocumentationSupport26

11.1DeviceSupport26

6.5ElectricalCharacteristics5

11.2RelatedLinks26

6.6SwitchingCharacteristics5

11.3CommunityResources26

6.7TypicalCharacteristics6

7DetailedDescription8

7.1Overview8

7.2FunctionalBlockDiagram8

7.3FeatureDescription8

11.4Trademarks26

11.5ElectrostaticDischargeCaution26

11.6Glossary26

12Mechanical,Packaging,andOrderable

Information26

4RevisionHistory

ChangesfromRevisionC(June2015)toRevisionDPage

•MovedFeaturebullet"2.7-Vto5.5-VInputVoltageRange"totopoflistandchangedApplicationsbulletlist1

ChangesfromRevisionB(September2004)toRevisionCPage

•AddedPinConfigurationandFunctionssection,ESDRatingstable,FeatureDescriptionsection,DeviceFunctional

Modes,ApplicationandImplementationsection,PowerSupplyRecommendationssection,Layoutsection,Device

andDocumentationSupportsection,andMechanical,Packaging,andOrderableInformationsection1

•Added,updated,andrearrangedThermalInformation,ElectricalCharacteristics,DetailedDescriptionsection,

TypicalCharacteristicssection.1

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5PinConfigurationandFunctions

RGEPackage

24-PINVQFNWithPowerPAD™

TopView

INP

CN

PGND

VREF

PGND

FBN

VIN

VNEG

OUTN

INN

OUTN

INN

NC−Nointernalconnection

PinFunctions

PIN

NAMENO.

I/ODESCRIPTION

AGND19—Analoggroundpin

BSW7OGatecontrolpinforexternalbatteryswitch.ThispingoeslowwhenENPissethigh.

CN18—Compensationpinforinvertingconvertercontrol

CP21—Compensationpinforboostconvertercontrol

ENN10IEnablepinforthenegativeoutputvoltage(0V:disabled,VIN:enabled)

ENP8IEnablepinforthepositiveoutputvoltage(0V:disabled,VIN:enabled)

FBN16IFeedbackpinforthenegativeoutputvoltagedivider

FBP22IFeedbackpinforthepositiveoutputvoltagedivider

INN5,6IInvertingconverterswitchinput

INP1,24IBoostconverterswitchinput.

NC12,20—Notconnected

OUTN13,14OInvertingconverterswitchoutput.

PGND2,3—Powergroundpin

PSN11IPower-savemodeenableforinverterstage(0V:disabled,VIN:enabled)

PSP9IPower-savemodeenableforboostconverterstage(0V:disabled,VIN:enabled)

VIN4IControlsupplyinput

VNEG15INegativeoutputvoltagesenseinput

VPOS23IPositiveoutputvoltagesenseinput

VREF17OReferenceoutputvoltage.Bypassthispinwitha220-nFcapacitortoground.Connectthe

lowerresistorofthenegativeoutputvoltagedividertothispin

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6Specifications

6.1AbsoluteMaximumRatings

overoperatingfree-airtemperaturerangeunlessotherwisenoted

(1)

MINMAXUNIT

VIN,INNInputvoltageatpins(2)–0.36V

VPOSMaximumvoltageatpin(2)–0.317VVNEGMinimumvoltageatpin(2)–17VIN+0.3V

VoltageatpinsENN,ENP,FBP,FBN,CN,CP,PSP,PSN,BSW(2)–0.3VIN+0.3V

INPInputvoltageatpin(2)–0.317V

DifferentialvoltagebetweenpinsOUTNtoVINN(2)–0.324V

TJOperatingvirtualjunctiontemperature–40150°C

TSTGStoragetemperature–65150°C

(1)StressesbeyondthoselistedunderAbsoluteMaximumRatingsmaycausepermanentdamagetothedevice.Thesearestressratings

only,whichdonotimplyfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunderRecommended

OperatingConditions.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.

(2)Allvoltagevaluesarewithrespecttonetworkgroundterminal,unlessotherwisenoted.

6.2ESDRatings

VALUEUNIT

Humanbodymodel(HBM),perANSI/ESDA/JEDECJS-001(1)±2000

V(ESD)Electrostaticdischarge

Charged-devicemodel(CDM),perJEDECspecificationJESD22-

C101(2)±750

V

(1)JEDECdocumentJEP155statesthat500-VHBMallowssafemanufacturingwithastandardESDcontrolprocess.

(2)JEDECdocumentJEP157statesthat250-VCDMallowssafemanufacturingwithastandardESDcontrolprocess.

6.3RecommendedOperatingConditions

overoperatingfree-airtemperature,unlessotherwisenoted

MINMAXUNIT

VI,VIN,

VINN

Applicationinputvoltagerange,inputvoltagerangeatVINandINNpins2.75.5V

VPOSAdjustableoutputvoltagerangefortheboostconverterVI+0.515V

VNEGAdjustableoutputvoltagerangefortheinvertingconverter–15–2V

VENN,

VENP

Enablesignalsvoltage05.5V

VPSN,

VPSP

Power-savemodeenablesignalsvoltage05.5V

TAOperatingfree-airtemperaturerange–4085°C

TJOperatingjunctiontemperaturerange–40125°C

6.4ThermalInformation

TPS65130TPS65131

THERMALMETRIC(1)

RGE(VQFN)RGE(VQFN)UNIT

24PINS24PINS

RθJAJunction-to-ambientthermalresistance34.134.1°C/W

RθJC(top)Junction-to-case(top)thermalresistance36.836.8°C/W

RθJBJunction-to-boardthermalresistance12.212.2°C/W

ψJTJunction-to-topcharacterizationparameter0.40.4°C/W

ψJBJunction-to-boardcharacterizationparameter12.312.3°C/W

RθJC(bot)Junction-to-case(bottom)thermalresistance2.82.8°C/W

(1)Formoreinformationabouttraditionalandnewthermalmetrics,seeSemiconductorandtheICPackageThermalMetricsapplication

report,SPRA953.

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6.5ElectricalCharacteristics

ThisspecificationappliesoverthefullrecommendedinputvoltagerangeVI=2.7Vto5.5Vandoverthetemperaturerange

TJ=–40°Cto125°Cunlessotherwisenoted.TypicalvaluesapplyforVI=3.6VandTJ=25°C.

PARAMETERTESTCONDITIONSMINTYPMAXUNIT

DC-DCSTAGE(VPOS,VNEG)

VPOSAdjustableoutputvoltagerangeVIN+0.5V15V

VNEGAdjustableoutputvoltagerange–15–2V

VREFReferencevoltageIREF=10µA1.21.2131.225V

IFBPPositivefeedbackinputbiascurrentVFBP=VREF50nA

IFBNNegativefeedbackinputbiascurrentVFBN=0.1VREF50nA

VFBPPositivefeedbackregulationvoltageVIN=2.7Vto5.5V1.1891.2131.237V

VFBNNegativefeedbackregulationvoltageVIN=2.7Vto5.5V–0.02400.024V

TotalOutputDCaccuracy3%

rDS(ON)(N)InverterswitchON-resistance

VIN=3.6V440620

VIN=5V330530

mΩ

ILIMNTPS65130Inverterswitchcurrentlimit2.7V<VIN<5.5V700800900mA

ILIMNTPS65131InverterswitchcurrentlimitVIN=3.6V180019502200mA

rDS(ON)(P)BoostswitchON-resistance

VPOS=5V230300

VPOS=10V170200

mΩ

ILIMPTPS65130Boostswitchcurrentlimit2.7V<VIN<5.5V700800900mA

ILIMPTPS65131BoostswitchcurrentlimitVIN=3.6V,VPOS=8V180019502200mA

CONTROLSTAGE

VIH

Highlevelinputvoltage,ENP,ENN,

PSP,PSN1.4V

VIL

Lowlevelinputvoltage,ENP,ENN,

PSP,PSN0.4V

IINInputcurrent,ENP,ENN,PSP,PSNENP,ENN,PSP,PSN=GNDorVIN0.010.1µA

RBSWOutputresistance27kΩ

VINInputvoltagerange2.75.5V

IQQuiescentcurrent

VIN300500µA

V

=3.6V,I=I=0,

VPOSENP=ENN=PSP=PSN=VIN,100120µA

VPOS=8V,VNEG=–5V

VNEG100120µA

ISDShutdownsupplycurrentENN=ENP=GND0.21.5µA

VUVLOUndervoltagelockoutthreshold2.12.352.7V

Thermalshutdown150°C

ThermalshutdownhysteresisJunctiontemperaturedecreasing5°C

6.6SwitchingCharacteristics

ThisspecificationappliesoverthefullrecommendedinputvoltagerangeVI=2.7Vto5.5Vandoverthetemperaturerange

TJ=–40°Cto125°Cunlessotherwisenoted.TypicalvaluesapplyforVI=3.6VandTJ=25°C.

PARAMETERTESTCONDITIONSMINTYPMAXUNIT

FREQUENCY

fSOscillatorfrequency125013801500kHz

DUTYCYCLE

DMAXPMaximumdutycycleboostconverter87.5%

DMAXN

Maximumdutycycleinverting

converter87.5%

DMINPMinimumdutycycleboostconverter12.5%

DMINN

Minimumdutycycleinverting

converter12.5%

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6.7TypicalCharacteristics

At25°C,unlessotherwisenoted.

10002000

TPS651319001800

8001600

VPOS=5V7001400

VPOS=5V

6001200

5001000

VPOS=8V

VPOS=10V

400

800

300600

VPOS=12V

200400

VPOS=15V

100200

0

2.52.93.33.74.14.54.95.3

0

2.52.93.33.74.14.54.95.3

VI−InputVoltage−V

VI−InputVoltage−V

Figure1.TPS65130MaximumOutputCurrent(VPOS)vs

InputVoltage

Figure2.TPS65131MaximumOutputCurrent(VPOS)vs

inputVoltage

4001100

TPS65131

1000

350VNEG=−4V

900

VNEG=–4V

300

800

250

700

VNEG=−8V

600

200VNEG=–10V

500

150

400VNEG=−10V

300

VNEG=–15V100

200

50

100

0

2.52.93.33.74.14.54.95.3

0

2.52.93.33.74.14.54.95.3

VI−InputVoltage−V

VI−InputVoltage−V

Figure3.TPS65130MaximumOutputCurrent(VNEG)vs

InputVoltage

Figure4.TPS65131MaximumOutputCurrent(VNEG)vs

InputVoltage

500

105

450

100

TA=85°C

TA=85°C400

TA=25°C

95350

TA=25°C

300TA=−40°C

90

250

85TA=−40°C

200

80

150

100

2.53.33.53.73.94.14.34.54.74.95.15.35.5

75

2.53.33.53.73.94.14.34.54.74.95.15.35.5

VI−InputVoltage−V

VI−InputVoltage−V

Figure5.NoLoadSupplyCurrentintoVINvsInputVoltageFigure6.NoLoadSupplyCurrentintoVPOSvsInputVoltage

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TypicalCharacteristics(continued)

At25°C,unlessotherwisenoted.

105

100TA=85°C

95

TA=25°C

90

85TA=−40°C

80

75

2.52.72.93.13.33.53.73.94.14.34.54.74.95.15.3

VI−InputVoltage−V

Figure7.NoLoadSupplyCurrentintoVNEGvsInputVoltage

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7DetailedDescription

7.1Overview

TheTPS6513xoperateswithaninputvoltagerangeof2.7Vto5.5Vandcangeneratebothapositiveand

negativeoutput.Bothconvertersworkindependentlyofeachother.Theyonlyshareacommonclockanda

commonvoltagereference.Bothoutputsareseparatelycontrolledbyafixed-frequency,pulse-width-modulated

(PWM)regulator.Ingeneral,eachconverteroperatesatcontinuousconductionmode(CCM).Atlightloads,the

negativeconvertercanenterdiscontinuousconductionmode(DCM).Astheloadcurrentdecreases,the

converterscanenterapower-savemodeifenabled.Thisworksindependentlyatbothconverters.Output

voltagescangoupto15Vattheboostoutputanddownto–15Vattheinverteroutput.

7.2FunctionalBlockDiagram

INP

VPOS

VINVIN

VIN

VPOS

ENP

Gate

Control

PSPBoostConverterControl

CP+FBP

±

VREF

BSW

VIN

Temperature

Control

Oscillator

VIN

+

-

Vref

ENNVNEG

PSNInvertingConverterControl±

FBN

CN

Gate

Control

+

VIN

INN

INNOUTN

AGND

PGND

7.3FeatureDescription

7.3.1PowerConversion

Bothconvertersoperateinafixed-frequency,PWMcontrolscheme.So,theON-timeoftheswitchesvaries

dependingoninput-to-outputvoltageratioandtheload.DuringthisON-time,theinductorsconnectedtothe

converterschargewithcurrent.Intheremainingtime,thetimeperiodsetbythefixedoperatingfrequency,the

inductorsdischargeintotheoutputcapacitorsthroughtherectifierdiodes.Usuallyatgreaterloads,theinductor

currentsarecontinuous.Atlighterloads,theboostconverterusesanadditionalinternalswitchtoallowcurrent

flowingbacktotheinput.Thisavoidsinductorcurrentbecomingdiscontinuousintheboostconverter.So,the

boostconverterisalwayscontrolledinacontinuouscurrentmode.Attheinvertingconverter,duringlightloads,

theinductorcurrentcanbecomediscontinuous.Inthiscase,thecontrolcircuitoftheinvertingcontrolleroutput

automaticallytakescareofthesechangingconditionstoalwaysoperatewithanoptimumcontrolsetup.

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FeatureDescription(continued)

7.3.2Control

Thecontrollercircuitsofbothconvertersemployafixed-frequency,multiple-feedforwardcontrollertopology.The

circuitsmonitorinputvoltage,outputvoltage,andvoltagedropacrosstheswitches.Changesintheoperating

conditionsoftheconvertersdirectlyaffectthedutycycleandmustnottaketheindirectandslowwaythroughthe

outputvoltagecontrolloops.Measurementerrorsinthisfeedforwardsystemarecorrectedbyaself-learning

controlsystem.Anexternalcapacitordampstheoutputtoavoidoutput-voltagestepsduetooutputchangesof

thisselflearningcontrolsystem.

Thevoltageloops,determinedbytheerroramplifiers,mustonlyhandlesmallsignalerrors.Theerroramplifiers

featureinternalcompensation.TheirinputsarethefeedbackvoltagesontheFBPandFBNpins.Thedevice

usesacomparisonofthesevoltageswiththeinternalreferencevoltagetogenerateanaccurateandstable

outputvoltage.

7.3.3Enable

Bothconverterscanbeenabledordisabledindividually.ApplyingalogicHIGHsignalattheenablepins(ENPfor

theboostconverter,ENNfortheinvertingconverter)enablesthecorrespondingoutput.Afterenabling,internal

circuitry,necessarytooperatethespecificconverter,thenturnson,followedbytheSoft-Start.

AApplyingalowsignalattheenableENPorENNpinshutsdownthecorrespondingconverter.Whenboth

enablepinsarelow,thedeviceentersshutdownmode,whereallinternalcircuitryturnsoff.Thedevicenow

consumesshutdowncurrentflowingintotheVINpin.Theoutputloadsoftheconverterscanbedisconnected

fromtheinput,seeLoadDisconnect.

7.3.4LoadDisconnect

Thedevicesupportscompletelydisconnectingtheloadwhentheconvertersaredisabled.Fortheinverting

converter,thedeviceturnsofftheinternalPMOSswitch.Iftheinvertingconverteristurnedoff,noDCcurrent

pathremainswhichcoulddischargethebatteryorsupply.

Thisisdifferentfortheboostconverter.Theexternalrectifyingdiode,togetherwiththeboostinductor,formaDC

currentpathwhichcoulddischargethebatteryorsupplyifanyloadconnectstotheoutput.Thedevicehasno

internalswitchtopreventcurrentfromflowing.Forthisreason,thedeviceoffersaPMOSgatecontroloutput

(BSW)toenableanddisableaPMOSswitchinthisDCcurrentpath,ideallydirectlybetweentheboostinductor

andbattery.Tobeabletofullydisconnectthebattery,theforwarddirectionoftheparasiticbackgatediodeofthis

switchmustpointtothebatteryorsupply.TheexternalPMOSswitch,whichconnectstoBSW,turnsonwhen

theboostconverterisenabledandturnsoffwhentheboostconverterisdisabled.

7.3.5Soft-Start

Bothconvertershaveimplementedsoft-startfunctions.Wheneachconverterisenabled,theimplementedswitch

currentlimitrampsupslowlytoitsnominalprogrammedvalueinabout1ms.Soft-startisimplementedtolimit

theinputcurrentduringstart-uptoavoidhighpeakcurrentsatthebatterywhichcouldinterferewithother

systemsconnectedtothesamebattery.Withoutsoft-start,thehighinputpeakcurrentcouldtriggerthe

implementedswitchcurrentlimit,whichcanleadtoasignificantvoltagedropsacrosstheseriesresistanceofthe

batteryanditsconnections.

7.3.6OvervoltageProtection

Bothconverters(boostandinverter)haveimplementedindividualovervoltageprotection.Ifthefeedbackvoltage

undernormaloperationexceedsthenominalvaluebytypically5%,thecorrespondingconvertershutsdown

immediatelytoprotectanyconnectedcircuitryfrompossibledamage.

7.3.7UndervoltageLockout

Anundervoltagelockout(UVLO)preventsthedevicefromstartingupandoperatingifthesupplyvoltageatthe

VINpinislowerthantheundervoltagelockoutthreshold.Forthiscase,thedeviceautomaticallyshutsdownboth

converterswhenthesupplyvoltageatVINfallsbelowthisthreshold.Nevertheless,partsofthecontrolcircuits

remainactive,whichisdifferentthandeviceshutdown.

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FeatureDescription(continued)

7.3.8OvertemperatureShutdown

Thedeviceautomaticallyshutsdownbothconvertersiftheimplementedinternaltemperaturesensordetectsa

chiptemperatureabovethethermalshutdowntemperature.Itautomaticallystartsoperatingagainwhenthechip

temperaturefallsbelowthisthermalshutdowntemperature.Thebuilt-inhysteresisavoidsundefinedoperation

causedbyringingfromshutdownandpreventsoperatingatatemperatureclosetotheovertemperature

shutdownthreshold.

7.4DeviceFunctionalModes

7.4.1Power-SaveMode

Thepower-savemodecanimproveefficiencyatlightloads.Inpower-savemode,theconverteronlyoperates

whentheoutputvoltagefallsbelowandeviceinternallysetthresholdvoltage.Theconverterrampsuptheoutput

voltagewithoneorseveraloperatingpulsesandgoesagainintopower-savemodeoncetheinductorcurrent

becomesdiscontinuous.

ThePSNandPSPlogiclevelselectsbetweenpower-savemodeandcontinuous-conductionmode.Ifthespecific

pins(PSPfortheboostconverter,PSNfortheinvertingconverter)areHIGH,thepower-savemodeforthe

correspondingconverteroperatesatlightloads.Similarly,aLOWonthePSPpinorPSNpindisablesthepower-

savemodeforthecorrespondingconverter.

7.4.2FullOperationwithVIN>2.7V

TherecommendedminimuminputsupplyvoltagefortheTPS6513xdeviceis2.7V.Abovethisvoltage,the

deviceachievestheperformancedescribedinthisdatasheet.

7.4.3LimitedOperationwithVUVLO<VIN<2.7V

WithinputsupplyvoltagesbetweenVUVLOand2.7V,thedevicecontinuestooperate—nofunctionsare

disabled—butfullperformanceisnotensure.

7.4.4NoOperationwithVIN<VUVLO

TheTPS6513xentersanundervoltagelockoutconditionwhentheinputsupplyvoltageisbelowtheUVLO

threshold.Inthismode,alldevicefunctionsaredisabled,andtheinputsupplycurrentconsumptionisminimized.

SeealsotheUndervoltageLockoutsection.

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8ApplicationsandImplementation

NOTE

InformationinthefollowingapplicationssectionsisnotpartoftheTIcomponent

specification,andTIdoesnotwarrantitsaccuracyorcompleteness.TI’scustomersare

responsiblefordeterminingsuitabilityofcomponentsfortheirpurposes.Customersshould

validateandtesttheirdesignimplementationtoconfirmsystemfunctionality.

8.1ApplicationInformation

TheTPS6513xboostconverteroutputvoltage,VPOS,andtheinvertingconverteroutputvoltage,VNEG,require

externalcomponentstosettherequiredoutputvoltages.Thevalidoutputvoltagerangesareasshownin

RecommendedOperatingConditions.Thefollowingsectionsshowatypicalapplicationexamplewithdifferent

outputvoltagesettingsandguidanceforexternalcomponentchoices.

8.2TypicalApplication

VI

Q1

L1

4.7µH

D1

VPOS

C4

22µF

C1

4.7µF

R1

C9

INPVPOS

BSWFBP

VREF

R2

R4

C8

220nF

INN

VIN

FBN

R7

100

C2

4.7µF

C3

100nF

TPS65130/131

R3

C10

ENPVNEG

VNEG

PSPOUTN

ENN

PSN

AGND

CN

CP

PGND

C6

10nF

C7

4.7nF

D2

L2

4.7µH

C5

22µF

Figure8.TypicalApplicationSchematicWithVPOS=10.5V,VNEG=–10V

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TypicalApplication(continued)

8.2.1DesignRequirements

Figure8usesthefollowingparameters:

Table1.DesignParameters

DESIGNPARAMETEREXAMPLEVALUE

Inputvoltagerange2.7Vto5.5V

Boostconverteroutputvoltage,VPOS

R1=1MΩ

R2=130kΩ

C9=6.8pF

10.5V

Invertingconverteroutputvoltage,

VNEG

R3=1MΩ

R4=121.2kΩ

C10=7.5pF

–10V

Table2.ListofComponents

REFERENCESETUPVALUE,DESCRIPTION

C1,C24.7µF,ceramic,6.3V,X5R

C30.1µF,ceramic,10V,X5R

C4,C54x4.7µF,ceramic,25V,X7R

—

C610nF,ceramic,16V,X7R

C74.7nF,50V,C0G

C8220nF,ceramic,6.3V,X5R

R1

VPOS=10.5V1MΩ

VPOS=15V975kΩ

R2

VPOS=10.5V130kΩ

VPOS=15V85.8kΩ

R3

VNEG=–10V1MΩ

VNEG=–15V1.3MΩ

R4

VNEG=–10V121.2kΩ

VNEG=–15V104.8kΩ

R7100Ω

D1,D2Schottky,1A,20V,OnsemiMBRM120

L1,L2WurthElektronik7447789004(TPS65130),

—

EPCOSB82462-G4472(TPS65131)

Q1MOSFET,P-channel,12V,4A,Vishay

Si2323DS

8.2.2DetailedDesignProcedure

TheTPS6513xDC-DCconverterisintendedforsystemstypicallypoweredbyasingle-cellLi-ionorLi-polymer

batterywithaterminalvoltagefrom2.7Vupto4.2V.Becausetherecommendedinputvoltagegoesupto5.5V,

thedeviceisalsosuitablefor3-cellalkaline,NiCd,orNiMHbatteries,aswellasanyregulatedsupplyvoltages

from2.7Vto5.5V.Itprovidestwoindependentoutputvoltagerailswhichareprogrammedasfollows.

ProgrammingtheOutputVoltage

.1BoostConverter

TheoutputvoltageoftheTPS6513xboostconverterstagecanbeadjustedwithanexternalresistordivider

connectedtotheFBPpin.ThetypicalvalueofthevoltageattheFBPpinisthereferencevoltage,whichis1.213

V.Themaximumrecommendedoutputvoltageattheboostconverteris15V.Toachieveappropriateaccuracy,

thecurrentthroughthefeedbackdividershouldbeabout100timesgreaterthanthecurrentintotheFBPpin.

TypicalcurrentintotheFBPpinis0.05µA,andthevoltageacrossR2is1.213V.Basedonthosevalues,the

recommendedvalueforR2shouldbelowerthan200kΩtosetthedividercurrentat5µAorgreater.

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TPS65130,TPS65131

SLVS493D–MARCH2004–REVISEDJANUARY2016

CalculatethevalueofresistorR1,asafunctionoftheneededoutputvoltage(VPOS),withEquation1:

§·

V

R1R21u¨POS¸

u¨POS¸

V

©¹

ref

(1)

Inthisexample,withR2=130kΩ,chooseR1=1MΩtosetVPOS=10.5V.

.2InvertingConverter

Theoutputvoltageoftheinvertingconverterstagecanalsobeadjustedwithanexternalresistordivider.Itmust

beconnectedtotheFBNpin.Unlikethefeedbackdividerattheboostconverter,thereferencepointofthefeedbackdividerisnotGNDbutVREF.SothetypicalvalueofthevoltageattheFBNpinis0V.Theminimum

recommendedoutputvoltageattheinvertingconverteris–15V.Feedbackdividercurrentconsiderationsare

similartotheconside