Texas Instruments LM117QML Bedienungsanleitung
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LM117QML,LM117QML-SP
www.ti.com
SNVS356D–MARCH2006–REVISEDAPRIL2013
LM117QML3-TerminalAdjustableRegulator
CheckforSamples:LM117QML,LM117QML-SP
1
FEATURES
DESCRIPTION
TheLM117seriesofadjustable3-terminalpositive
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•AvailablewithRadiationEnsured
voltageregulatorsiscapableofsupplyingeither0.5A
–HighDoseRate100krad(Si)
or1.5Aovera1.2Vto37Voutputrange.Theyare
–ELDRSFree100krad(Si)
exceptionallyeasytouseandrequireonlytwo
externalresistorstosettheoutputvoltage.Further,
•Specifiedmax.0.3%LoadRegulation(LM117)
bothlineandloadregulationarebetterthanstandard
•Specified0.5Aor1.5AOutputCurrent
fixedregulators.
•AdjustableOutputDownto1.2V
Inadditiontohigherperformancethanfixed
•CurrentLimitConstantwithTemperature
regulators,theLM117seriesoffersfulloverload
•80dBRippleRejection
protectionavailableonlyinIC's.Includedonthechip
arecurrentlimit,thermaloverloadprotectionandsafe
•OutputisShort-CircuitProtected
areaprotection.Alloverloadprotectioncircuitry
remainsfullyfunctionaleveniftheadjustment
terminalisdisconnected.
Normally,nocapacitorsareneededunlessthedevice
issituatedmorethan6inchesfromtheinputfilter
capacitorsinwhichcaseaninputbypassisneeded.
Anoptionaloutputcapacitorcanbeaddedtoimprove
transientresponse.Theadjustmentterminalcanbe
bypassedtoachieveveryhighripplerejectionratios
whicharedifficulttoachievewithstandard3-terminal
regulators.
Besidesreplacingfixedregulators,theLM117is
usefulinawidevarietyofotherapplications.Since
theregulatoris"floating"andseesonlytheinput-to-
outputdifferentialvoltage,suppliesofseveral
hundredvoltscanberegulatedaslongasthe
maximuminputtooutputdifferentialisnotexceeded,
i.e.,avoidshort-circuitingtheoutput.
Also,itmakesanespeciallysimpleadjustable
switchingregulator,aprogrammableoutputregulator,
orbyconnectingafixedresistorbetweenthe
adjustmentpinandoutput,theLM117canbeused
asaprecisioncurrentregulator.Supplieswith
electronicshutdowncanbeachievedbyclampingthe
adjustmentterminaltogroundwhichprogramsthe
outputto1.2Vwheremostloadsdrawlittlecurrent.
Forthenegativecomplement,seeLM137seriesdata
sheet.
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Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof
TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2Alltrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2006–2013,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
Produktspezifikationen
| Marke: | Texas Instruments |
| Kategorie: | Nicht kategorisiert |
| Modell: | LM117QML |
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