National Semiconductor | High-performance Analog

 

 LM5009A   

100V, 150 mA Constant On-Time Buck Switching Regulator from the PowerWise® Family
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Features

  • Operating input voltage range: 6V to 95V
  • Integrated 100V, N-Channel buck switch
  • Internal start-up regulator
  • No loop compensation required
  • Ultra-Fast transient response
  • On time varies inversely with input voltage
  • Operating frequency remains constant with varying line voltage and load current
  • Adjustable output voltage from 2.5V
  • Highly efficient operation
  • Precision internal reference
  • Low bias current
  • Intelligent current limit
  • Thermal shutdown
  • Description

    The LM5009A is a functional variant of the LM5009 COT Buck Switching Regulator. The functional differences of the LM5009A are: The minimum input operating voltage is 6 volts, the on-time equation is slightly different, and the requirement for a minimum load current is removed.

    The LM5009A Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, Buck bias regulator. This high voltage regulator contains an 100 V N-Channel Buck Switch. The device is easy to implement and is provided in the MSOP-8 and the thermally enhanced LLP-8 packages. The regulator is based on a control scheme using an ON time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant. The control scheme requires no loop compensation. An intelligent current limit is implemented with forced OFF time, which is inversely proportional to Vout. This scheme ensures short circuit control while providing minimum foldback. Other features include: Thermal Shutdown, VCC under-voltage lockout, Gate drive under-voltage lockout, Max Duty Cycle limiter, and a pre-charge switch.

    Also Recommended
    LM5007500mA Output Current, 9-75V Input Voltage Range Step-Down Switching Regulator
    LM5008A350mA Output Current, 6-95V Input Voltage Range Step-Down Switching Regulator
    LM5010A1A Output Current, 6-75V Input Voltage Range Step-Down Switching Regulator



    Typical Application
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    Block Diagram
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    Typical Performance
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    Parameters / ValuesLM5009A LM5007 LM5008A LM5010A
    Output Current150 mA 500 mA 350 mA 1000 mA
    Input Min Voltage6 Volt 9 Volt 6 Volt 6 Volt
    Input Max Voltage95 Volt 75 Volt 95 Volt 75 Volt
    Output Min2.5 Volt 2.5 Volt 2.5 Volt 2.5 Volt
    Output Max85 Volt 73 Volt 75 Volt 70 Volt
    Frequency Min50 kHz 50 kHz 50 kHz 50 kHz
    Frequency Max600 kHz 800 kHz 600 kHz 1000 kHz
    Efficiency (peak)93 % 93 % 92 % 95 %
    On/Off PinYes Yes Yes Yes
    PowerGood / Error FlagNo No No No
    SoftStartNo No No Yes
    Sync PinNo No No No
    InvertingYes Yes Yes Yes
    FlybackNo No No No
    RegTypeSwitching Regulator Switching Regulator Switching Regulator Switching Regulator
    Temperature Min-40 deg C -40 deg C -40 deg C -40 deg C
    Temperature Max125 deg C 125 deg C 125 deg C 150 deg C
    Adjustable OutputYes Yes Yes Yes
    Adj Switch FrequencyYes Yes Yes Yes
    PWM ModeConstant On-Time Constant on-time Constant On-Time Constant on-time
    TopologyBuck Buck Buck Buck
    Special FeaturesInternal Startup regulator Internal startup regulator for Vin>9V, internal 80V/0.7A N-FET, Pull Ron pin to ground for shutdown Internal Startup regulator No compensation required, ultra-fast transient response
    Step-DownYes Yes Yes Yes
    Multiple Output CapabilityNo No No No
    Output Range2.5V to 85V 2.5V to 73V 2.5V to 75V 2.5V to 70V
    Switching Frequency600 kHz 800 kHz 600 kHz 1000 kHz
    Feedback Voltage2.5 Volt 2.5 Volt 2.5 Volt 2.5 Volt
    PowerWiseYes
    Synchronous RectificationNo No No No

    Datasheets
    TitleSizeDateOther
    Language
    LM5009A 100V, 150 mA Constant On-Time Buck Switching Regulator393
    Kbytes
    21-Apr-11   


    Application Notes
    TitleSizeDateOther
    Language
    AN-1955: Application Note 1955 LM5009A Evaluation Board487
    Kbytes
    2-Jun-09 

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5009AMM/NOPB


    RoHS Status


    MINI SOIC
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1435
    DIGI-KEYWorldwide6595
    FARNELLEurope and Asia974
    MOUSERWorldwide935
    NEWARKAmericas974
    TAYLORAmericas1435
    $1.35 each at 1K+ pcsreel
    of
    1000
    LM5009AMMX/NOPB


    RoHS Status


    MINI SOIC
    Full production
    Lead Time: 16 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide3500
    DIGI-KEYWorldwide0
    $1.35 each at 1K+ pcsreel
    of
    3500
    LM5009ASD/NOPB


    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide2000
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide2208
    FARNELLEurope and Asia1030
    MOUSERWorldwide1000
    NEWARKAmericas1030
    TAYLORAmericas2000
    $1.35 each at 1K+ pcsreel
    of
    1000
    LM5009ASDX/NOPB


    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $1.35 each at 1K+ pcsreel
    of
    4500

    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 LM5009A.

    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 LM5009A is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5009AEVAL/NOPB

    Evaluation Board for the LM5009AFull production
    Lead Free (RoHS)

     
    DistributorRegionQty
    AVNET-EMWorldwide2
    DIGI-KEYWorldwide0
    TAYLORAmericas4
    $40.50 each1

    Description:

    The LM5009AEVAL evaluation board provides the design engineer with a fully functional buck regulator, employing the constant on-time (COT) operating principle. This evaluation board provides a 5V output over an input range of 8V to 75V. The circuit delivers load currents to 150 mA, with current limit set at a nominal 260 mA.

    Contents:




    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
    LM5009AMM/NOPB

    29.851
    30.002
    MINI SOIC81260DetailDownloadN/A
    ZXTT
    SLLA
    LM5009AMMX/NOPB

    29.851
    30.002
    MINI SOIC81260DetailDownloadN/A
    ZXTT
    SLLA
    LM5009ASD/NOPB

    37.567
    LLP81260DetailDownloadN/A
    NS
    UZXYTT
    5009ASD
    LM5009ASDX/NOPB

    37.567
    LLP81260DetailDownloadN/A
    NS
    UZXYTT
    5009ASD

    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 LM5009A.

    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 LM5009A is located at RoHS Status.

    Design Tools
    TitleSizeDate
    LM5009A Quick Start Calculator  

    CAD Symbols and Models
    Download LM5009A CAD Symbols
     Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM5009AMMABCD150XV2036010011554964327875145
    LM5009AMMXABCD150XV2036010011554964327875145
    LM5009ASDABCD150XV2036010011554964327875145
    LM5009ASDXABCD150XV2036010011554964327875145

    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 LM5009A.

    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 LM5009A is located at RoHS Status.

    [Information as of 9-Feb-2012]