National Semiconductor | High-performance Analog

 

 LM5000   

High Voltage Switch Mode Regulator
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Features
  • 80V internal switch
  • Operating input voltage range of 3.1V to 40V
  • Pin selectable operating frequency
       300kHz/700kHz (-3)
       600kHz/1.3MHz (-6)
  • Adjustable output voltage
  • External compensation
  • Input undervoltage lockout
  • Softstart
  • Current limit
  • Over temperature protection
  • External shutdown
  • Small 16-Lead TSSOP or 16-Lead LLP package
  • Description

    The LM5000 is a monolithic integrated circuit specifically designed and optimized for flyback, boost or forward power converter applications. The internal power switch is rated for a maximum of 80V, with a current limit set to 2A. Protecting the power switch are current limit and thermal shutdown circuits. The current mode control scheme provides excellent rejection of line transients and cycle-by-cycle current limiting. An external compensation pin and the built-in slope compensation allow the user to optimize the frequency compensation. Other distinctive features include softstart to reduce stresses during start-up and an external shutdown pin for remote ON/OFF control. There are two operating frequency ranges available. The LM5000-3 is pin selectable for either 300kHz (FS Grounded) or 700kHz (FS Open). The LM5000-6 is pin selectable for either 600kHz (FS Grounded) or 1.3MHz (FS Open). The device is available in a low profile 16-lead TSSOP package or a thermally enhanced 16-lead LLP package.


    Applications

  • Flyback Regulator
  • Forward Regulator
  • Boost Regulator
  • DSL Modems
  • Distributed Power Converters
  • Also Recommended
    LM50011A, 75V Boost/Flyback Regulator
    LM50020.5A, 75V Boost/Flyback Regulator
    LM5020Low Side Controller For Higher Currents Than LM5000



    Typical Application
    click for larger image


    Block Diagram
    click for larger image



    Typical Performance
    *click for larger image


    Parameters / ValuesLM5000 LM5001 LM5002 LM5020
    Output Range1.259V min. Undefined Undefined
    Switch Current2 Amp 1 Amp 0.5 Amp
    Input Min Voltage3.1 Volt 3.1 Volt 3.1 Volt 13 Volt
    Input Max Voltage40 Volt 75 Volt 75 Volt 100 Volt
    Feedback Voltage1.259 Volt 1.26 Volt 1.26 Volt 1.25 Volt
    Frequency Max1300 kHz 1500 kHz 1500 kHz 1000 kHz
    Output Min1.259 Volt Undefined Volt Undefined Volt
    Output MaxUndefined Volt Undefined Volt Undefined Volt
    Efficiency (peak)90 % 96 % 95 % 85 %
    Sync PinNo Yes Yes Yes
    Adj Switch FrequencyYes Yes Yes Yes
    Frequency Min300 kHz 50 kHz 50 kHz 50 kHz
    On/Off PinYes Yes Yes Yes
    PowerGood / Error FlagNo No No No
    SoftStartYes No No Yes
    Special Features80V internal switch, selectable frequency 80% and 50% duty cycle limit (-2 and -1 versions), Programmable UVLO, error amplifier for non-isolated designs, leading-edge blanking, high current gate drive
    PWM Modecurrent Current Mode Current Mode
    TopologyFlyback, Boost, Forward, SEPIC Boost, Flyback, Forward, SEPIC Boost, Flyback, Forward, SEPIC Flyback, Inverting, Buck, Boost, Forward
    Step-UpYes Yes Yes Yes
    InvertingNo No No Yes
    FlybackYes Yes Yes Yes
    RegTypeSwitching Regulator Switching Regulator Switching Regulator Switching Controller
    Adjustable OutputYes Yes Yes Yes
    Output PowerUndefined Watt Undefined Watt Undefined Watt 300 Watt
    Temperature Min-40 deg C -40 deg C -40 deg C -40 deg C
    Temperature Max125 deg C 125 deg C 125 deg C 125 deg C
    AutomotiveYes Yes Yes
    Quiescent Current2.1 mA 0.095 mA 0.095 mA
    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5000-3MTC/NOPB

    LM5000-3MTC

    RoHS Status


    TSSOP
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1470
    AVNET-EMWorldwide184
    DIGI-KEYWorldwide950
    FARNELLEurope and Asia549
    NEWARKAmericas19
    RS COMPONENTSWorldwide35
    TAYLORAmericas1470
    $2.00 each at 1K+ pcsrail
    of
    92
    LM5000SD-3/NOPB

    LM5000SD-3

    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1598
    DIGI-KEYWorldwide4011
    NEWARKAmericas97
    RS COMPONENTSWorldwide44
    TAYLORAmericas1598
    $2.00 each at 1K+ pcsreel
    of
    1000
    LM5000SD-6/NOPB

    LM5000SD-6

    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide1000
    MOUSERWorldwide1000
    $2.00 each at 1K+ pcsreel
    of
    1000
    LM5000SDX-3/NOPB

    LM5000SDX-3

    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $2.00 each at 1K+ pcsreel
    of
    4500
    LM5000SDX-6/NOPB

    LM5000SDX-6

    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $2.00 each at 1K+ pcsreel
    of
    4500

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM5000-3MTCEP
    NONE
    NATIONAL SEMICONDUCTOR
    16 Nov 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 LM5000.

    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 LM5000 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5000EVAL
    High Voltage Switch Mode RegulatorFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide1
    RS COMPONENTSWorldwide1
    $45.00 each1

    Features:

    • 80 V internal switch
    • Operating input voltage range of 3.1 V to 40 V
    • Pin selectable operating frequency
         300 kHz/700kHz (-3)
         600 kHz/1.25MHz (-6)
    • Adjustable output voltage
    • External compensation
    • Input undervoltage lockout
    • Softstart
    • Current limit
    • Over temperature protection
    • External shutdown
    • Small 16-Lead TSSOP or 14-Lead LLP package

    Applications:

    • Flyback Regulator
    • Forward Regulator
    • Boost Regulator
    • DSL Modems
    • Distributed Power Converters

    Contents:

    • A fully assembled LM5000 evaluation board
    • LM5000 appnote (Included in datasheet)
    • LM5000 datasheet



    National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

    Lead Free product status is available through the search tool located here

    Part Number(s)
    (NSID)
    Weight
    (milligrams)
    TypePinsMSL RatingPeak ReflowRoHS
    Status
    CAD SymbolsModelsPackage
    Marking
    Format
    LM5000-3MTC/NOPB

    LM5000-3MTC
    56.74
    57
    TSSOP161
    1
    260
    260
    DetailDownloadN/A
    NSZXYTT
    LM5000
    3MTC
    LM5000SD-3/NOPB

    LM5000SD-3
    64.927
    65.192
    LLP161
    1
    260
    260
    DetailDownloadN/A
    NS
    UZXYTT
    5000-3
    LM5000SD-6/NOPB

    LM5000SD-6
    64.927
    65.192
    LLP161
    1
    260
    260
    DetailDownloadN/A
    NS
    UZXYTT
    5000-6
    LM5000SDX-3/NOPB

    LM5000SDX-3
    64.927
    65.192
    LLP161
    1
    260
    260
    DetailDownloadN/A
    NS
    UZXYTT
    5000-3
    LM5000SDX-6/NOPB

    LM5000SDX-6
    64.927
    65.192
    LLP161
    1
    260
    260
    DetailDownloadN/A
    NS
    UZXYTT
    5000-6

    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 LM5000.

    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 LM5000 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM5000-3MTCEP
    NONE
    NATIONAL SEMICONDUCTOR
    16 Nov 2008

    [Information as of 9-Feb-2012]