Texas Instruments MAX660 Handleiding

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

MAX660

SNOS405B–NOVEMBER1999–REVISEDMAY2017

MAX660SwitchedCapacitorVoltageConverter

1

1Features

1

•InvertsorDoublesInputSupplyVoltage

•NarrowSO-8Package

•6.5-ΩTypicalOutputResistance

•88%TypicalConversionEfficiencyat100mA

•SelectableOscillatorFrequency:10kHz/80kHz

2Applications

•LaptopComputers

•CellularPhones

•MedicalInstruments

•OperationalAmplifierPowerSupplies

•InterfacePowerSupplies

•HandheldInstruments

3Description

TheMAX660CMOScharge-pumpvoltageconverter

isaversatileunregulatedswitched-capacitorinverter

ordoubler.Operatingfromawide1.5-Vto5.5-V

supplyvoltage,theMAX660usestwolow-cost

capacitorstoprovide100mAofoutputcurrent

withoutthecost,sizeandEMIrelatedtoinductor-

basedconverters.Withanoperatingcurrentofonly

120µAandoperatingefficiencygreaterthan90%at

mostloads,theMAX660providesidealperformance

forbattery-poweredsystems.MAX660devicescan

beoperateddirectlyinparalleltoloweroutput

impedance,thusprovidingmorecurrentatagiven

voltage.

TheFC(frequencycontrol)pinselectsbetweena

nominal10-kHzor80-kHzoscillatorfrequency.The

oscillatorfrequencycanbeloweredbyaddingan

externalcapacitortotheOSCpin.Also,theOSCpin

maybeusedtodrivetheMAX660withanexternal

clockupto150kHz.Throughthesemethods,output

ripplefrequencyandharmonicsmaybecontrolled.

Additionally,theMAX660maybeconfiguredtodivide

apositiveinputvoltagepreciselyinhalf.Inthismode,

inputvoltagesashighas11Vmaybeused.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

MAX660SOIC(8)4.90mm×3.91mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

VoltageInverterPositiveVoltageDoubler

Product specificaties