National Semiconductor | High-performance Analog

 

 LM2940   
1A Low Dropout Regulator 		Click link to Download

Features
  • Dropout voltage typically 0.5V @IO = 1A
  • Output current in excess of 1A
  • Output voltage trimmed before assembly
  • Reverse battery protection
  • Internal short circuit current limit
  • Mirror image insertion protection
  • P + Product Enhancement tested

    • Description

    The LM2940/LM2940C positive voltage regulator features the ability to source 1A of output current with a dropout voltage of typically 0.5V and a maximum of 1V over the entire temperature range. Furthermore, a quiescent current reduction circuit has been included which reduces the ground current when the differential between the input voltage and the output voltage exceeds approximately 3V. The quiescent current with 1A of output current and an input-output differential of 5V is therefore only 30 mA. Higher quiescent currents only exist when the regulator is in the dropout mode (VIN − VOUT ≤ 3V).

    Designed also for vehicular applications, the LM2940/LM2940C and all regulated circuitry are protected from reverse battery installations or 2-battery jumps. During line transients, such as load dump when the input voltage can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to protect both the internal circuits and the load. The LM2940/LM2940C cannot be harmed by temporary mirror-image insertion. Familiar regulator features such as short circuit and thermal overload protection are also provided.

    Also Recommended
    LP38690▲Lower Quiescent Current, Stable With Ceramic Output Capacitors
    LP38692▲Lower Quiescent Current, Stable With Ceramic Output Capacitors & Enable Pin



    Typical Application
    click for larger image


    		Connection Diagram
    click for larger image



    Typical Performance
    click for larger image


    Parameters / ValuesLM2940 LP38690 LP38692
    Output Current1000 mA 1000 mA 1000 mA
    Output Min9, 12, 15, 8, 10, 5 Volt 1.8, 5.0, 2.5, 3.3 Volt 1.8, 2.5, 3.3, 5 Volt
    Input Min VoltageUndefined Volt 2.75, 3.95, 3.3, 5.45 Volt 2.95, 2.7, 5.45, 3.75 Volt
    Input Max Voltage26 Volt 10 Volt 10 Volt
    Dropout Voltage0.5 Volt 0.45, 0.95, 0.8, 0.65 Volt 0.45, 0.95, 0.8, 0.65 Volt
    Adjustable OutputNo No No
    Quiescent Current10 mA 0.055 mA 0.055 mA
    On/Off PinNo No Yes
    PowerGood / Error FlagNo No No
    RegTypeLDO LDO LDO
    Temperature Min-40 deg C -40 deg C -40 deg C
    Temperature Max125, 85 deg C 125 deg C 125 deg C
    Output Max9, 12, 15, 8, 10, 5 Volt 1.8, 5.0, 2.5, 3.3 Volt 1.8, 2.5, 3.3, 5 Volt
    Output Voltage9, 12, 15, 8, 10, 5 Volt 1.8, 5.0, 2.5, 3.3 Volt 1.8, 2.5, 3.3, 5 Volt

    Datasheets
    TitleSizeDateOther
    Language
    LM2940 1A Low Dropout Regulator565
    Kbytes    		18-Mar-07日本語  
    LM2940 Mil-Aero Datasheet MNLM2940-12-X261 Kbytes 
    LM2940 Mil-Aero Datasheet MNLM2940-15-X261 Kbytes 
    LM2940 Mil-Aero Datasheet MNLM2940-5.0-X262 Kbytes 


    Other Technical Documents
    TitleTypeDate
    Linear and Switching Voltage Regulator Fundamental Part 1App Note 2007-03-21

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM2940IMP-10/NOPB

    LM2940IMP-10

    RoHS Status

    SOT-223    		Full production
    Lead Time: 16 weeks

     
    DistributorRegionQty
    ARROWWorldwide1685
    AVNET-EMWorldwide845
    DIGI-KEYWorldwide2336
    FARNELLEurope and Asia122
    MOUSERWorldwide970
    NEWARKAmericas580
    TAYLORAmericas1685
    		$0.81 each at 1K+ pcsreel
    of
    1000
    LM2940IMP-12/NOPB

    LM2940IMP-12

    RoHS Status

    SOT-223    		Full production
    Lead Time: 16 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide3169
    AVNET-EMWorldwide315
    DIGI-KEYWorldwide951
    FARNELLEurope and Asia1460
    MOUSERWorldwide938
    NEWARKAmericas2128
    TAYLORAmericas5007
    		$0.81 each at 1K+ pcsreel
    of
    1000
    LM2940IMP-15/NOPB

    LM2940IMP-15

    RoHS Status

    SOT-223    		Full production
    Lead Time: 12 weeks

     
    DistributorRegionQty
    ARROWWorldwide1000
    AVNET-EMWorldwide3000
    DIGI-KEYWorldwide1308
    MOUSERWorldwide901
    TAYLORAmericas1000
    		$0.81 each at 1K+ pcsreel
    of
    1000
    LM2940IMP-5.0/NOPB

    LM2940IMP-5.0

    RoHS Status

    SOT-223    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide85
    DIGI-KEYWorldwide16940
    MOUSERWorldwide1587
    TAYLORAmericas23414
    		$0.81 each at 1K+ pcsreel
    of
    1000
    LM2940IMP-9.0/NOPB

    LM2940IMP-9.0

    RoHS Status

    SOT-223    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide984
    DIGI-KEYWorldwide1495
    MOUSERWorldwide985
    NEWARKAmericas969
    TAYLORAmericas984
    		$0.81 each at 1K+ pcsreel
    of
    1000
    LM2940IMPX-10/NOPB

    LM2940IMPX-10

    RoHS Status

    SOT-223    		Full production
    Lead Time: 16 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.81 each at 1K+ pcsreel
    of
    2000
    LM2940IMPX-12/NOPB

    LM2940IMPX-12

    RoHS Status

    SOT-223    		Full production
    Lead Time: 16 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.81 each at 1K+ pcsreel
    of
    2000
    LM2940IMPX-5.0/NOPB

    LM2940IMPX-5.0

    RoHS Status

    SOT-223    		Full production
    Lead Time: 16 weeks

     
    DistributorRegionQty
    ARROWWorldwide10000
    DIGI-KEYWorldwide0
    MOUSERWorldwide1590
    TAYLORAmericas14000
    TECHMOSAAsia Pacific26000
    		$0.81 each at 1K+ pcsreel
    of
    2000
    LM2940IMPX-8.0/NOPB

    LM2940IMPX-8.0

    RoHS Status

    SOT-223    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.81 each at 1K+ pcsreel
    of
    2000
    LM2940LD-12/NOPB

    LM2940LD-12

    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide1000
    		$0.80 each at 1K+ pcsreel
    of
    1000
    LM2940LD-5.0/NOPB

    LM2940LD-5.0

    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide1686
    DIGI-KEYWorldwide0
    		$0.80 each at 1K+ pcsreel
    of
    1000
    LM2940S-10/NOPB

    LM2940S-10

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide515
    AVNET-EMWorldwide241
    DIGI-KEYWorldwide557
    FARNELLEurope and Asia131
    MOUSERWorldwide538
    NEWARKAmericas536
    TAYLORAmericas515
    		$0.73 each at 1K+ pcsrail
    of
    45
    LM2940S-12/NOPB

    LM2940S-12

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide457
    AVNET-EMWorldwide637
    DIGI-KEYWorldwide867
    FARNELLEurope and Asia5
    MOUSERWorldwide476
    NEWARKAmericas169
    RS COMPONENTSWorldwide100
    TAYLORAmericas976
    		$0.73 each at 1K+ pcsrail
    of
    45
    LM2940S-5.0/NOPB

    LM2940S-5.0

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1068
    AVNET-EMWorldwide206
    DIGI-KEYWorldwide885
    MOUSERWorldwide1108
    NEWARKAmericas603
    TAYLORAmericas6648
    		$0.73 each at 1K+ pcsrail
    of
    45
    LM2940S-8.0/NOPB

    LM2940S-8.0

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide285
    AVNET-EMWorldwide240
    DIGI-KEYWorldwide478
    MOUSERWorldwide495
    NEWARKAmericas88
    TAYLORAmericas285
    		$0.77 each at 1K+ pcsrail
    of
    45
    LM2940S-9.0/NOPB

    LM2940S-9.0

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide450
    DIGI-KEYWorldwide2256
    MOUSERWorldwide380
    NEWARKAmericas324
    TAYLORAmericas450
    		$0.77 each at 1K+ pcsrail
    of
    45
    LM2940SX-10/NOPB

    LM2940SX-10

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide1865
    AVNET-EMWorldwide500
    DIGI-KEYWorldwide0
    MOUSERWorldwide1000
    TAYLORAmericas1865
    		$0.73 each at 1K+ pcsreel
    of
    500
    LM2940SX-12/NOPB

    LM2940SX-12

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide10000
    AVNET-EMWorldwide500
    DIGI-KEYWorldwide0
    MOUSERWorldwide980
    TAYLORAmericas10000
    		$0.73 each at 1K+ pcsreel
    of
    500
    LM2940SX-5.0/NOPB

    LM2940SX-5.0

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide500
    DIGI-KEYWorldwide1500
    MOUSERWorldwide746
    NEWARKAmericas925
    TAYLORAmericas9370
    		$0.73 each at 1K+ pcsreel
    of
    500
    LM2940SX-8.0/NOPB

    LM2940SX-8.0

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide500
    AVNET-EMWorldwide1500
    DIGI-KEYWorldwide0
    MOUSERWorldwide130
    TAYLORAmericas500
    		$0.77 each at 1K+ pcsreel
    of
    500
    LM2940SX-9.0/NOPB

    LM2940SX-9.0

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide500
    DIGI-KEYWorldwide0
    MOUSERWorldwide380
    		$0.77 each at 1K+ pcsreel
    of
    500
    LM2940T-10.0/NOPB

    LM2940T-10.0

    RoHS Status

    TO-220    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide651
    AVNET-EMWorldwide442
    DIGI-KEYWorldwide889
    MOUSERWorldwide1255
    NEWARKAmericas450
    RS COMPONENTSWorldwide535
    TAYLORAmericas1238
    		$0.60 each at 1K+ pcsrail
    of
    45
    LM2940T-12.0/NOPB

    LM2940T-12.0

    RoHS Status

    TO-220    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1098
    AVNET-EMWorldwide733
    DIGI-KEYWorldwide2164
    MOUSERWorldwide461
    NEWARKAmericas696
    RS COMPONENTSWorldwide290
    TAYLORAmericas4983
    		$0.60 each at 1K+ pcsrail
    of
    45
    LM2940T-5.0/NOPB

    LM2940T-5.0

    RoHS Status

    TO-220    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1431
    AVNET-EMWorldwide3
    DIGI-KEYWorldwide1112
    MOUSERWorldwide2211
    NEWARKAmericas159
    RS COMPONENTSWorldwide2941
    TAYLORAmericas15863
    		$0.60 each at 1K+ pcsrail
    of
    45
    LM2940T-8.0/NOPB

    LM2940T-8.0

    RoHS Status

    TO-220    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1957
    AVNET-EMWorldwide174
    DIGI-KEYWorldwide882
    MOUSERWorldwide600
    NEWARKAmericas2
    RS COMPONENTSWorldwide270
    TAYLORAmericas1935
    		$0.60 each at 1K+ pcsrail
    of
    45
    LM2940T-9.0/NOPB

    LM2940T-9.0

    RoHS Status

    TO-220    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide630
    DIGI-KEYWorldwide1204
    MOUSERWorldwide608
    NEWARKAmericas486
    RS COMPONENTSWorldwide260
    TAYLORAmericas2195
    		$0.60 each at 1K+ pcsrail
    of
    45

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM2940C-5 MWC
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM2940IMP-8.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM2940IMPX-15
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM2940IMPX-9.0
    		LT1086
    		SEMTECH
    		16 Nov 2008
    LM2940J-12/883
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LM2940J-15/883
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LM2940J-5.0/883
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LM2940K-12/883
    		NONE
    		NONE
    		08 Sep 1999
    LM2940K-15-MIL
    		NONE
    		NONE
    		08 Sep 1999
    LM2940K-15/883
    		NONE
    		NONE
    		07 Dec 1999
    LM2940K-5.0/883
    		NONE
    		NONE
    		08 Sep 1999
    LM2940K-8.0/883
    		NONE
    		NONE
    		08 Sep 1999
    LM2940LD-10
    		LT1086
    		SEMTECH
    		16 Nov 2008
    LM2940LD-15
    		EC1086
    		ECI
    		16 Nov 2008
    LM2940LD-8.0
    		EC1086
    		ECI
    		16 Nov 2008
    LM2940LD-9.0
    		LT1086
    		SEMTECH
    		16 Nov 2008
    LM2940LDX-10
    		EC1086
    		ECI
    		16 Nov 2008
    LM2940LDX-12
    		LT1086
    		SEMTECH
    		16 Nov 2008
    LM2940LDX-15
    		EC1086
    		ECI
    		16 Nov 2008
    LM2940LDX-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM2940LDX-8.0
    		LT1086
    		SEMTECH
    		16 Nov 2008
    LM2940LDX-9.0
    		EC1086
    		ECI
    		16 Nov 2008
    LM2940WG-12/883
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LM2940WG-15/883
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM2940.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM2940 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LM2940IMP-10/NOPB

    LM2940IMP-10
    		120.612
    121.002
    		SOT-22341
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    L55B
    LM2940IMP-12/NOPB

    LM2940IMP-12
    		120.611
    121.002
    		SOT-22341
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    L56B
    LM2940IMP-15/NOPB

    LM2940IMP-15
    		120.612
    121.002
    		SOT-22341
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    L70B
    LM2940IMP-5.0/NOPB

    LM2940IMP-5.0
    		120.612
    121.002
    		SOT-22341
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    L53B
    LM2940IMP-9.0/NOPB

    LM2940IMP-9.0
    		120.612
    121.002
    		SOT-22341
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    L0EB
    LM2940IMPX-10/NOPB

    LM2940IMPX-10
    		120.612
    121.002
    		SOT-22341
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    L55B
    LM2940IMPX-12/NOPB

    LM2940IMPX-12
    		120.612
    121.002
    		SOT-22341
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    L56B
    LM2940IMPX-5.0/NOPB

    LM2940IMPX-5.0
    		120.612
    121.002
    		SOT-22341
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    L53B
    LM2940IMPX-8.0/NOPB

    LM2940IMPX-8.0
    		120.612
    121.002
    		SOT-22341
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    L54B
    LM2940LD-12/NOPB

    LM2940LD-12
    		37.272
    37.401
    		LLP83
    1    		260
    235    		DetailDownloadN/A
    		NS
    UZXYTT
    L00018B
    LM2940LD-5.0/NOPB

    LM2940LD-5.0
    		37.272
    37.401
    		LLP83
    1    		260
    235    		DetailDownloadN/A
    		NS
    UZXYTT
    L00014B
    LM2940S-10/NOPB

    LM2940S-10
    		1289.225
    1289.976
    		TO-26333
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LM2940S
    -10 P+
    LM2940S-12/NOPB

    LM2940S-12
    		1289.225
    1289.976
    		TO-26333
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LM2940S
    -12 P+
    LM2940S-5.0/NOPB

    LM2940S-5.0
    		1289.225
    1289.976
    		TO-26333
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LM2940S
    -5.0 P+
    LM2940S-8.0/NOPB

    LM2940S-8.0
    		1289.225
    1289.976
    		TO-26333
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LM2940S
    -8.0 P+
    LM2940S-9.0/NOPB

    LM2940S-9.0
    		1289.225
    1289.976
    		TO-26333
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LM2940S
    -9.0 P+
    LM2940SX-10/NOPB

    LM2940SX-10
    		1289.225
    1289.976
    		TO-26333
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LM2940S
    -10 P+
    LM2940SX-12/NOPB

    LM2940SX-12
    		1289.225
    1289.976
    		TO-26333
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LM2940S
    -12 P+
    LM2940SX-5.0/NOPB

    LM2940SX-5.0
    		1289.225
    1289.976
    		TO-26333
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LM2940S
    -5.0 P+
    LM2940SX-8.0/NOPB

    LM2940SX-8.0
    		1289.225
    1289.976
    		TO-26333
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LM2940S
    -8.0 P+
    LM2940SX-9.0/NOPB

    LM2940SX-9.0
    		1289.225
    1289.976
    		TO-26333
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LM2940S
    -9.0 P+
    LM2940T-10.0/NOPB

    LM2940T-10.0
    		1991.805
    1993.446
    		TO-22031
    1    		NA
    NA    		DetailDownloadN/A
    		NSUZXYTTE#
    LM2940T
    10.0 P+
    LM2940T-12.0/NOPB

    LM2940T-12.0
    		1991.805
    1993.446
    		TO-22031
    1    		NA
    NA    		DetailDownloadN/A
    		NSUZXYTTE#
    LM2940T
    12.0 P+
    LM2940T-5.0/NOPB

    LM2940T-5.0
    		1991.806
    1993.446
    		TO-22031
    1    		NA
    NA    		DetailDownloadN/A
    		NSUZXYTTE#
    LM2940T
    -5.0 P+
    LM2940T-8.0/NOPB

    LM2940T-8.0
    		1991.805
    1993.446
    		TO-22031
    1    		NA
    NA    		DetailDownloadN/A
    		NSUZXYTTE#
    LM2940T
    -8.0 P+
    LM2940T-9.0/NOPB

    LM2940T-9.0
    		1991.806
    1993.446
    		TO-22031
    1    		NA
    NA    		DetailDownloadN/A
    		NSUZXYTTE#
    LM2940T
    -9.0 P+

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM2940.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM2940 is located at RoHS Status.

    CAD Symbols and Models
    Download LM2940 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM2940IMP-10SLM04404600353250011002356520
    LM2940IMP-12SLM04404600353250011002356520
    LM2940IMP-15SLM04404600353250011002356520
    LM2940IMP-5.0SLM04404600353250011002356520
    LM2940IMP-9.0SLM04404600353250011002356520
    LM2940IMPX-10SLM04404600353250011002356520
    LM2940IMPX-12SLM04404600353250011002356520
    LM2940IMPX-5.0SLM04404600353250011002356520
    LM2940IMPX-8.0SLM04404600353250011002356520
    LM2940LD-12SLM04404600353250011002356520
    LM2940LD-5.0SLM04404600353250011002356520
    LM2940S-10SLM04404600353250011002356520
    LM2940S-12SLM04404600353250011002356520
    LM2940S-5.0SLM04404600353250011002356520
    LM2940S-8.0SLM04404600353250011002356520
    LM2940S-9.0SLM04404600353250011002356520
    LM2940SX-10SLM04404600353250011002356520
    LM2940SX-12SLM04404600353250011002356520
    LM2940SX-5.0SLM04404600353250011002356520
    LM2940SX-8.0SLM04404600353250011002356520
    LM2940SX-9.0SLM04404600353250011002356520
    LM2940T-10.0SLM04404600353250011002356520
    LM2940T-12.0SLM04404600353250011002356520
    LM2940T-5.0SLM04404600353250011002356520
    LM2940T-8.0SLM04404600353250011002356520
    LM2940T-9.0SLM04404600353250011002356520

    Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

    For more information on Reliability Metrics, please click here.


    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM2940.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM2940 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM2940C-5 MWC
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM2940IMP-8.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM2940IMPX-15
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM2940IMPX-9.0
    		LT1086
    		SEMTECH
    		16 Nov 2008
    LM2940J-12/883
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LM2940J-15/883
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LM2940J-5.0/883
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LM2940K-12/883
    		NONE
    		NONE
    		08 Sep 1999
    LM2940K-15-MIL
    		NONE
    		NONE
    		08 Sep 1999
    LM2940K-15/883
    		NONE
    		NONE
    		07 Dec 1999
    LM2940K-5.0/883
    		NONE
    		NONE
    		08 Sep 1999
    LM2940K-8.0/883
    		NONE
    		NONE
    		08 Sep 1999
    LM2940LD-10
    		LT1086
    		SEMTECH
    		16 Nov 2008
    LM2940LD-15
    		EC1086
    		ECI
    		16 Nov 2008
    LM2940LD-8.0
    		EC1086
    		ECI
    		16 Nov 2008
    LM2940LD-9.0
    		LT1086
    		SEMTECH
    		16 Nov 2008
    LM2940LDX-10
    		EC1086
    		ECI
    		16 Nov 2008
    LM2940LDX-12
    		LT1086
    		SEMTECH
    		16 Nov 2008
    LM2940LDX-15
    		EC1086
    		ECI
    		16 Nov 2008
    LM2940LDX-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM2940LDX-8.0
    		LT1086
    		SEMTECH
    		16 Nov 2008
    LM2940LDX-9.0
    		EC1086
    		ECI
    		16 Nov 2008
    LM2940WG-12/883
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LM2940WG-15/883
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008

    [Information as of 3-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation