National Semiconductor | High-performance Analog

 

 LM5118   

Wide Voltage Range Buck-Boost Controller from the PowerWise® Family
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Features

  • LM5118Q is an Automotive Grade product that is AEC-Q100 grade 1 qualified (-40°C to 125°C operating junction temperature)
  • Ultra-wide input voltage range from 3V to 75V
  • Emulated peak current mode control
  • Smooth transition between step-down and step- up modes
  • Switching frequency programmable to 500KHz
  • Oscillator synchronization capability
  • Internal high voltage bias regulator
  • Integrated high and low-side gate drivers
  • Programmable soft-start time
  • Ultra low shutdown current
  • Enable input wide bandwidth error amplifier
  • 1.5% feedback reference accuracy
  • Thermal shutdown
  • Description

    The LM5118 wide voltage range Buck-Boost switching regulator controller features all of the functions necessary to implement a high performance, cost efficient Buck-Boost regulator using a minimum of external components. The Buck-Boost topology maintains output voltage regulation when the input voltage is either less than or greater than the output voltage making it especially suitable for automotive applications. The LM5118 operates as a buck regulator while the input voltage is sufficiently greater than the regulated output voltage and gradually transitions to the buck-boost mode as the input voltage approaches the output. This dual mode approach maintains regulation over a wide range of input voltages with optimal conversion efficiency in the buck mode and a glitch-free output during mode transitions. This easy to use controller includes drivers for the high side buck MOSFET and the low side boost MOSFET. The regulator’s control method is based upon current mode control utilizing an emulated current ramp. Emulated current mode control reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of the very small duty cycles necessary in high input voltage applications. Additional protection features include current limit, thermal shutdown and an enable input. The device is available in a power enhanced TSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation.

    WEBENCH® LM5118
        Min   Max   Range  
      VIN V    5.00 – 75.00V  
      VOUT V    1.23 – 70.00V  
      IOUT A    ≤ 20.00A  
      Ambient Temp °C    ≤ 100°C  
    Footprint BOM Cost Efficiency
    What are WEBENCH® tools?


    Also Recommended
    LM3478Buck Or Boost Input Voltage With A SEPIC Configuration
    LM5116100V Emulated Current Mode Buck Controller



    Typical Application
    click for larger image


    Block Diagram
    *click for larger image



    Typical Performance
    click for larger image


     

    ParametersValues
    Input Min Voltage 3 Volt
    Input Max Voltage 75 Volt
    Adjustable Output Yes
    Feedback Voltage 1.23 Volt
    Output Range 1.23V-70V
    Frequency Min 50 kHz
    Frequency Max 500 kHz
    Efficiency (peak) 95 %
    Adj Switch Frequency Yes
    Sync Pin Yes
    On/Off Pin Yes
    SoftStart Yes
    PowerGood / Error Flag No
    Special Features soft mode transition
    Topology buck-boost
    Output Max 70 Volt
    Output Min 1.23 Volt
    AEC Q-100 Automotive Grade 1
    Step-Down Yes
    Step-Up Yes
    Inverting No
    Flyback No
    RegType Switching Controller
    Multiple Output Capability No
    Temperature Min -40 deg C
    Temperature Max 125 deg C
    PowerWise Yes

    Datasheets
    TitleSizeDateOther
    Language
    LM5118 Wide Voltage Range Buck-Boost Controller525
    Kbytes
    17-Oct-11   


    Application Notes
    TitleSizeDateOther
    Language
    AN-1819: Application Note 1819 LM5118 Evaluation Board390
    Kbytes
    30-Apr-08 
    AN-2178: Application Note 2178 LM5118 Four Switch Conversion395
    Kbytes
    17-Oct-11 

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5118MH/NOPB


    RoHS Status


    TSSOP EXP PAD
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide930
    DIGI-KEYWorldwide760
    FARNELLEurope and Asia890
    MOUSERWorldwide51
    NEWARKAmericas399
    TAYLORAmericas930
    $2.68 each at 1K+ pcsrail
    of
    73
    LM5118MHX/NOPB


    RoHS Status


    TSSOP EXP PAD
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide2459
    DIGI-KEYWorldwide0
    MOUSERWorldwide2496
    TAYLORAmericas2459
    $2.68 each at 1K+ pcsreel
    of
    2500
    LM5118Q1MH/NOPB

    Auto Grade 1
    RoHS Status


    TSSOP EXP PAD
    Full production
    Lead Time: 8 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide847
    $3.15 each at 1K+ pcsrail
    of
    73
    LM5118Q1MHX/NOPB

    Auto Grade 1
    RoHS Status


    TSSOP EXP PAD
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $3.15 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 LM5118.

    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 LM5118 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5118EVAL/NOPB

    Evaluation Board for the LM5118Full production
    Lead Free (RoHS)

     
    DistributorRegionQty
    AVNET-EMWorldwide6
    DIGI-KEYWorldwide39
    FARNELLEurope and Asia2
    MOUSERWorldwide7
    NEWARKAmericas2
    $70.00 each1

    Description:

    The LM5118 evaluation board is designed to provide the design engineer with a fully functional, Emulated Current Mode Control, buck-boost power converter to evaluate the LM5118 controller IC. The evaluation board provides a 12V output with 3A of output current capability. The evaluation board`s wide input voltage range is from 75V to 5V, with operation down to 3V with some component changes. The evaluation board operates at 300 kHz, a good compromise between conversion efficiency, tradeoffs between buck and buck-boost mode requirements, and converter size. The printed circuit board consists of 4 layers with 2 ounce copper top and bottom, and 1 ounce copper on internal layers. The board is constructed with FR4 material. The application note contains the evaluation board schematic, Bill-of-Materials (BOM) and a quick setup procedure. Refer to the LM5118 data sheet
    and quick start for more complete circuit and design information.

    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
    LM5118MH/NOPB

    73.061
    TSSOP EXP PAD201260DetailDownloadN/A
    NSUZXYTT
    LM5118
    MH
    LM5118MHX/NOPB

    73.061
    TSSOP EXP PAD201260DetailDownloadN/A
    NSUZXYTT
    LM5118
    MH
    LM5118Q1MH/NOPB

    73.061
    TSSOP EXP PAD201260DetailDownloadN/A
    NSUZXYTT
    LM5118
    Q1MH
    LM5118Q1MHX/NOPB

    73.061
    TSSOP EXP PAD201260DetailDownloadN/A
    NSUZXYTT
    LM5118
    Q1MH

    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 LM5118.

    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 LM5118 is located at RoHS Status.

    Design Tools
    TitleSizeDate
    LM5118 Quick Start Component Calculator  

    CAD Symbols and Models
    Download LM5118 CAD Symbols
     Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM5118MHABCD150XV1038680025950002736338335
    LM5118MHXABCD150XV1038680025950002736338335
    LM5118Q1MHABCD150XV1038680025950002736338335
    LM5118Q1MHXABCD150XV1038680025950002736338335

    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 LM5118.

    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 LM5118 is located at RoHS Status.

    LM5118 High-Voltage Buck-Boost Switching Controller Demo
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    PowerWise Products and Metrics
    Loading video...


    Requirements and Solutions for Automotive Power Management Applications
    Click image to play video in new window


    LM5118 High-Voltage Buck-Boost Switching Controller Demo
    Date: 2009-07-01
    Length: 0:03:17
    PowerWise Products and Metrics
    Date: 2008-05-21
    Length: 0:5:11
    Requirements and Solutions for Automotive Power Management Applications
    Date: 2008-02-17
    Length: 00:40:00
    [Information as of 9-Feb-2012]