Texas Instruments LM2750 Bedienungsanleitung

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VOUT

VIN

V

IN

2.7 V to 5.6 V

GND

LM2750-5.0

CAP+

CAP-

SD

C

IN

2.2 PF

C

OUT

2.2 PF

C

FLY

1 PF

V

OUT

5 V ± 4%

8, 9

1, 2

4

10

7

3, 5, 6, DAP

Capacitors: 1 PF - TDK C1608X5R1A105K

2.2 PF - TDK C2012X7R1A225K

I

OUT

up to 120 mA, (V

IN

t 2.9 V)

I

OUT

up to 40 mA, (V

IN

t 2.7 V)

Copyright © 2016, Texas Instruments Incorporated

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LM2750

,

LM2750-ADJ

SNVS180N–APRIL2002–REVISEDAPRIL2016

LM2750Low-NoiseSwitched-CapacitorBoostRegulator

1

1Features

1

•WideInputVoltageRange:2.7Vto5.6V

•InductorlessSolution:ApplicationRequiresOnly

ThreeSmallCeramicCapacitors

•Fixed5-VOutputandAdjustableOutputVoltage

OptionsAvailable

•85%PeakEfficiency

–70%AverageEfficiencyOverLi-IonInput

Range(2.9Vto4.2V)

•OutputCurrentupto120mAWith2.9V≤V

IN

≤

5.6V

–OutputCurrentupto40mAWith2.7V≤V

IN

≤

2.9V

•Fixed1.7-MHzSwitchingFrequencyforaLow-

Noise,Low-RippleOutputSignal

•Pre-RegulationMinimizesInputCurrentRipple,

KeepingtheBatteryLine

(V

IN

)VirtuallyNoise-Free

•ShutdownSupplyCurrentLessThan2µA

•TinyWSONPackageWithOutstandingPower

Dissipation:UsuallyNoDeratingRequired

2Applications

•WhiteandColoredLED-BasedDisplayLighting

•CellularPhoneSIMCards

•AudioAmplifierPowerSupplies

•GeneralPurposeLi-Ion-to-5-VConversion

•EPOSBarcodeScanners

•IndustrialHandheldRadios

3Description

TheLM2750isaregulatedswitched-capacitor

doublerthatproducesalow-noiseoutputvoltage.The

5-Voutputvoltageoption(LM2750-5.0)cansupplyup

to120mAofoutputcurrentovera2.9-Vto5.6-V

inputrange,aswellasupto40mAofoutputcurrent

whentheinputvoltageisaslowas2.7V.An

adjustableoutputvoltageoptionwithsimilaroutput

currentcapabilitiesisalsoavailable(LM2750-ADJ).

TheLM2750hasbeenplacedinTI's10-pinWSON,a

packagewithexcellentthermalpropertiesthatkeeps

thepartfromoverheatingunderalmostallrated

operatingconditions.

Aperfectfitforspace-constrained,battery-powered

applications,theLM2750requiresonlythreeexternal

components:oneinputcapacitor,oneoutput

capacitor,andoneflyingcapacitor.Small,

inexpensiveceramiccapacitorsarerecommendedfor

use.Inconjunctionwiththe

1.7-MHzfixedswitchingfrequencyoftheLM2750,

thesecapacitorsyieldlowoutput-voltageripple,which

isbeneficialforsystemsrequiringalow-noisesupply.

Pre-regulationminimizesinputcurrentripple,thus

reducinginputnoisetonegligiblelevels.

Atightlycontrolledsoft-startfeaturelimitsinrush

currentsduringpartactivation.Shutdowncompletely

disconnectstheloadfromtheinput.Outputcurrent

limitingandthermalshutdowncircuitryprotectboth

theLM2750andotherconnecteddevicesintheevent

ofoutputshortsorexcessivecurrentloads.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

LM2750

LM2750-ADJ

WSON(10)3.00mm×3.00mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

TypicalApplicationCircuit

Produktspezifikationen