LM1117800-mA,Low-DropoutLinearRegulator
1Features
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3Description
TheLM1117isalowdropoutvoltageregulatorwithadropoutof1.2Vat800mAofloadcurrent.
TheLM1117isavailableinanadjustableversion,whichcansettheoutputvoltagefrom1.25to13.8Vwithonlytwoexternalresistors.Inaddition,itisavailableinfivefixedvoltages,1.8V,2.5V,3.3V,and5V.
TheLM1117offerscurrentlimitingandthermalshutdown.ItscircuitincludesaZenertrimmedbandgapreferencetoassureoutputvoltageaccuracytowithin±1%.
Aminimumof10-μFtantalumcapacitorisrequiredattheoutputtoimprovethetransientresponseandstability.
DeviceInformation(1)
PARTNUMBER
PACKAGESOT-223(4)TO-220(3)
LM1117,LM1117I
TO-252(3)WSON(8)TO-263(3)
BODYSIZE(NOM)6.50mm×3.50mm14.986mm×10.16mm6.58mm×6.10mm4.00mm×4.00mm10.18mm×8.41mm
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Foranewerdrop-inalternative,seetheTLV1117Availablein1.8V,2.5V,3.3V,5V,andAdjustableVersions
Space-savingSOT-223andWSONpackagesCurrentlimitingandthermalprotectionOutputcurrent:800mA
Lineregulation:0.2%(maximum)Loadregulation:0.4%(maximum)Temperaturerange:
–LM1117:0°Cto125°C–LM1117I:?40°Cto125°C
2Applications
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ACdrivepowerstagemodulesMerchantnetworkandserverPSUIndustrialAC/DCUltrasoundscanners
Servodrivecontrolmodules
(1)Forallavailablepackages,seetheorderableaddendumat
theendofthedatasheet.
AdjustableOutputRegulator
LM1117
SNOS412O–FEBRUARY2000–REVISEDJUNE2020
LM1117ElectricalCharacteristics(continued)
unlessotherwisespecified,TJ=25°C.
PARAMETER
TESTCONDITIONS
LM1117-1.8
IOUT=10mA,VIN=3.8V,TJ=25°CLM1117-1.8
0≤IOUT≤800mA,3.2V≤VIN≤10V
TJ=25°C
overthejunctiontemperaturerange0°Cto125°C
1.7462.475
2.52.5
2.453.267
3.33.3
3.2354.95
TJ=25°C
overthejunctiontemperaturerange0°Cto125°CTJ=25°C
overthejunctiontemperaturerange0°Cto125°CTJ=25°C
overthejunctiontemperaturerange0°Cto125°CTJ=25°C
overthejunctiontemperaturerange0°Cto125°CTJ=25°C
overthejunctiontemperaturerange0°Cto125°CTJ=25°C
overthejunctiontemperaturerange0°Cto125°CTJ=25°C
overthejunctiontemperaturerange0°Cto125°CTJ=25°C
overthejunctiontemperaturerange0°Cto125°CTJ=25°C
overthejunctiontemperaturerange0°Cto125°CTJ=25°C
overthejunctiontemperaturerange0°Cto125°CTJ=25°C
overthejunctiontemperaturerange0°Cto125°C
1
15
mV
1
10
mV
1
10
mV
1
10
mV
0.2%
0.4%
1
10
mV
1
6
mV
1
6
mV
1
6
mV
4.9
0.035%
0.2%
55
5.13.3655.05
V
2.553.333
V
MIN(1)1.782
TYP(2)
1.81.8
1.8542.525
V
MAX(1)1.818
VUNIT
LM1117-2.5
IOUT=10mA,VIN=4.5V,TJ=25°CLM1117-2.5
0≤IOUT≤800mA,3.9V≤VIN≤10V
VOUT
OutputVoltage
LM1117-3.3
IOUT=10mA,VIN=5VTJ=25°C
TJ=25°CLM1117-3.3
0≤IOUT≤800mA,4.75V≤VIN≤overthejunctiontemperaturerange10V0°Cto125°CLM1117-5.0
IOUT=10mA,VIN=7V,TJ=25°CLM1117-5.0
0≤IOUT≤800mA,6.5V≤VIN≤12V
LM1117-ADJ
IOUT=10mA,1.5V≤VIN-VOUT≤13.75V
LM1117-1.8
IOUT=0mA,3.2V≤VIN≤10VLM1117-2.5
IOUT=0mA,3.9V≤VIN≤10VLM1117-3.3
IOUT=0mA,4.75V≤VIN≤15VLM1117-5.0
IOUT=0mA,6.5V≤VIN≤15VLM1117-ADJ
VIN–VOUT=3V,10≤IOUT≤800mA
LM1117-1.8
VIN=3.2V,0≤IOUT≤800mALM1117-2.5
VIN=3.9V,0≤IOUT≤800mALM1117-3.3
VIN=4.75V,0≤IOUT≤800mALM1117-5.0
VIN=6.5V,0≤IOUT≤800mA
TJ=25°C
overthejunctiontemperaturerange0°Cto125°C
ΔVOUTLineRegulation
(3)
ΔVOUTLoadRegulation
(3)
(3)Loadandlineregulationaremeasuredatconstantjunctionroomtemperature.
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LM1117
SNOS412O–FEBRUARY2000–REVISEDJUNE2020
8DetailedDescription
8.1Overview
TheLM1117adjustableversiondevelopsa1.25Vreferencevoltage,VREF,betweentheoutputandtheadjustterminal.AsshowninFigure10,thisvoltageisappliedacrossresistorR1togenerateaconstantcurrentI1.ThecurrentIADJfromtheadjustterminalcouldintroduceerrortotheoutput.Butsinceitisverysmall(60μA)comparedwiththeI1andveryconstantwithlineandloadchanges,theerrorcanbeignored.TheconstantcurrentI1thenflowsthroughtheoutputsetresistorR2andsetstheoutputvoltagetothedesiredlevel.Forfixedvoltagedevices,R1andR2areintegratedinsidethedevices.
Figure10.BasicAdjustableRegulator
8.2FunctionalBlockDiagram
8.3FeatureDescription
8.3.1LoadRegulation
TheLM1117regulatesthevoltagethatappearsbetweenitsoutputandgroundpins,orbetweenitsoutputandadjustpins.Insomecases,lineresistancescanintroduceerrorstothevoltageacrosstheload.Toobtainthebestloadregulation,afewprecautionsareneeded.
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LM1117
SNOS412O–FEBRUARY2000–REVISEDJUNE2020
9.3SystemExamples
SeveralcircuitscanberealizedwiththeLM1117.Thecircuitdiagramsinthissectiondemonstratemultiplesystemexamplesthatcanbeutilizedinmanyapplications.
Figure16.FixedOutputRegulatorFigure17.AdjustingOutputofFixedRegulators
Figure18.RegulatorWithReference
Figure19.5-VLogicRegulatorWithElectronic
Shutdown*
Figure20.BatteryBacked-UpRegulatedSupply
Figure21.LowDropoutNegativeSupply
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LM1117
SNOS412O–FEBRUARY2000–REVISEDJUNE2020
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