National Semiconductor | High-performance Analog

 

 LM5116   

Wide Range Synchronous Buck Controller from the PowerWise® Family
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Features

  • Emulated peak current mode
  • Wide operating range up to 100V
  • Low IQ shutdown (< 10 µA)
  • Drives standard or logic level MOSFETs
  • Robust 3.5A peak gate drive
  • Free-run or synchronous operation to 1 MHz
  • Optional diode emulation mode
  • Programmable output from 1.215V to 80V
  • Precision 1.5% voltage reference
  • Programmable current limit
  • Programmable soft-start
  • Programmable line under-voltage lockout
  • Automatic switch to external bias supply
  • TSSOP-20EP exposed pad
  • Thermal shutdown
  • Description

    The LM5116 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle by cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The operating frequency is programmable from 50 kHz to 1 MHz. The LM5116 drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A low quiescent current shutdown disables the controller and consumes less than 10 µA of total input current. Additional features include a high voltage bias regulator, automatic switch-over to external bias for improved efficiency, thermal shutdown, frequency synchronization, cycle by cycle current limit and adjustable line under-voltage lockout. The device is available in a power enhanced TSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation.

    WEBENCH® LM5116
        Min   Max   Range  
      VIN V    6.00 – 100.00V  
      VOUT V    -80.00 – 80.00V  
      IOUT A    ≤ 20.00A  
      Ambient Temp °C    ≤ 100°C  
    Footprint BOM Cost Efficiency
    What are WEBENCH® tools?


    Also Recommended
    LM2511642V Input Voltage Max
    LM5116WG100V Input CERPACK-20 With No Thermal Shutdown
    LM5118Buck-Boost



    Parameters / ValuesLM5116 LM25116 LM5116WG
    Output Current20000 mA 20000 mA 20000 mA
    Input Min Voltage6 Volt 6 Volt 6 Volt
    Input Max Voltage100 Volt 42 Volt 100 Volt
    Feedback Voltage1.215 Volt 1.215 Volt 1.215 Volt
    Feedback Tolerance1.5 % 1.5 % 1.5 %
    Frequency Min50 kHz 50 kHz 50 kHz
    Frequency Max1000 kHz 1000 kHz 1000 kHz
    Efficiency (peak)95 % 95 % 95 %
    Output Range1.215V to 80V 1.215V to 36V 1.215V to 80V
    Adj Switch FrequencyYes Yes Yes
    Adjustable OutputYes Yes Yes
    Synchronous RectificationYes Yes Yes
    On/Off PinYes Yes Yes
    PowerGood / Error FlagNo No No
    SoftStartYes Yes Yes
    Sync PinYes Yes Yes
    InvertingNo No No
    FlybackNo No No
    Lossless Current SenseYes Yes Yes
    RegTypeSwitching Controller Switching Controller Switching Controller
    Temperature Min-40 deg C -40 deg C -40 deg C
    Temperature Max150 deg C 125 deg C 150 deg C
    Channels1 Channels 1 Channels 1 Channels
    Special FeaturesHigh step-down ratio using emulated current mode control High step-down ratio using emulated current mode control High step-down ratio using emulated current mode control
    TopologyBuck Buck Buck
    PWM ModeCurrent Current Current
    Step-DownYes Yes Yes
    Step-UpNo No No
    Multiple Output CapabilityNo No
    Output Max80 Volt 36 Volt 80 Volt
    Output Min1.215 Volt 1.215 Volt 1.215 Volt
    AutomotiveYes Yes Yes
    PowerWiseYes Yes Yes

    Datasheets
    TitleSizeDateOther
    Language
    LM5116 Wide Range Synchronous Buck Controller631
    Kbytes
    9-Aug-11   


    Application Notes
    TitleSizeDateOther
    Language
    AN-1596: Application Note 1596 LM5116 Evaluation Board299
    Kbytes
    18-May-07 
    AN-1617: Application Note 1617 LM25116 Evaluation Board314
    Kbytes
    10-Apr-07 
    AN-1628: Application Note 1628 Minimizing FET Losses For a High Input Rail Buck Converter91
    Kbytes
    5-Sep-07日本語
    中文
    AN-1713: Application Note 1713 LM5116-12 Evaluation Board313
    Kbytes
    3-Oct-07 


    Other Technical Documents
    TitleTypeDate
    An Easy Way To Roll Your Own Programmable Power SupplyExternal Article 2009-01-29
    Hitchhiker's Ride to the World of Current Mode ControlExternal Article 2007-07-11

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5116MH/NOPB

    LM5116MH

    RoHS Status


    TSSOP EXP PAD
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AITGAsia Pacific73
    ARROWWorldwide452
    AVNET-EMWorldwide528
    DIGI-KEYWorldwide1794
    FARNELLEurope and Asia1588
    MOUSERWorldwide24
    NEWARKAmericas1168
    TAYLORAmericas3332
    $2.55 each at 1K+ pcsrail
    of
    73
    LM5116MHX/NOPB

    LM5116MHX

    RoHS Status


    TSSOP EXP PAD
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide2480
    AVNET-EMWorldwide2500
    DIGI-KEYWorldwide0
    MOUSERWorldwide2182
    TAYLORAmericas2480
    $2.55 each at 1K+ pcsreel
    of
    2500

    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 LM5116.

    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 LM5116 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5116-12EVAL/NOPB

    LM5116-12 Evaluation BoardFull production
    Lead Free (RoHS)

     
    DistributorRegionQty
    AVNET-EMWorldwide2
    DIGI-KEYWorldwide0
    MOUSERWorldwide4
    $70.50 each1

    Introduction:

    The LM5116-12 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM5116 controller IC. The evaluation board provides a 12V output with a 5A current capability. The operating input voltage ranges from 15V to 80V. The design operates at 250kHz, a good compromise between conversion efficiency and solution size. The printed circuit board consists of 4 layers, 2 ounce copper top and bottom 1 ounce copper internal layers on FR4 material with a thickness of 0.06 inches. This application note contains the evaluation board schematic, Bill-of-Materials (BOM) and a quick setup procedure. Refer to the LM5116 datasheet for complete circuit design information.


    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5116EVAL/NOPB

    Wide Range Synchronous Buck ControllerFull production
    Lead Free (RoHS)

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide3
    $70.50 each1

    LM5116 Wide Range Synchronous Buck Controller

    Features:

    • Emulated peak current mode
    • Wide operating range up to 100V
    • Low IQ sleep mode (<10µA)
    • Drives standard or logic level MOSFETs
    • Robust 2A peak gate drive
    • Free-run or synchronous operation to 1MHz
    • Optional diode emulation mode
    • Programmable output from 1.215V to 80V
    • Precision 1.5% voltage reference
    • Programmable current limit
    • Programmable soft-start
    • Programmable line under-voltage lockout
    • Automatic switch to external bias supply
    • TSSOP-20EP exposed pad
    • Thermal shutdown

    Contents:

    • A fully assembled LM5116 evaluation board
    • LM5116 datasheet
    • LM5116 evaluation board appnote



    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
    LM5116MH/NOPB

    LM5116MH
    73.061
    73.592
    TSSOP EXP PAD201
    1
    260
    260
    DetailDownloadN/A
    NSUZXYTT
    LM5116
    MH
    LM5116MHX/NOPB

    LM5116MHX
    73.061
    73.592
    TSSOP EXP PAD201
    1
    260
    260
    DetailDownloadN/A
    NSUZXYTT
    LM5116
    MH

    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 LM5116.

    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 LM5116 is located at RoHS Status.

    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM5116MHABCD150XV2036010011554964327875145
    LM5116MHXABCD150XV2036010011554964327875145

    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 LM5116.

    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 LM5116 is located at RoHS Status.

    [Information as of 9-Feb-2012]