National Semiconductor | High-performance Analog

 

 LM5105   

100V Half Bridge Gate Driver with Programmable Dead-Time
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Features

  • Drives both a high side and low side N-channel MOSFET
  • 1.8A peak gate drive current
  • Bootstrap supply voltage range up to 118V DC
  • Integrated bootstrap diode
  • Single TTL compatible Input
  • Programmable turn-on delays (Dead-time)
  • Enable Input pin
  • Fast turn-off propagation delays (26ns typical)
  • Drives 1000pF with 15ns rise and fall time
  • Supply rail under-voltage lockout
  • Low power consumption
  • Description

    The LM5105 is a high voltage gate driver designed to drive both the high side and low side N –Channel MOSFETs in a synchronous buck or half bridge configuration. The floating high-side driver is capable of working with rail voltages up to 100V. The single control input is compatible with TTL signal levels and a single external resistor programs the switching transition dead-time through tightly matched turn-on delay circuits. A high voltage diode is provided to charge the high side gate drive bootstrap capacitor. The robust level shift technology operates at high speed while consuming low power and provides clean output transitions. Under-voltage lockout disables the gate driver when either the low side or the bootstrapped high side supply voltage is below the operating threshold. The LM5105 is offered in the thermally enhanced 10-pin LLP plastic package.

    Also Recommended
    LM5100A3A Half Bridge Driver CMOS-Type Threshold Inputs
    LM5101A3A Half Bridge Driver TTL-Type Threshold Inputs
    LM5102Independently Programmable Delay (Rising Edge)
    LM5104Single PWM Input, Has Adaptive Deadtime With Programmable Delay



    Typical Application
    *click for larger image


    Block Diagram
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    Typical Performance
    *click for larger image


    Parameters / ValuesLM5105 LM5100A LM5101A LM5102 LM5104
    Topology Bridge, Synchronous Buck Bridge, Synchronous Buck Bridge, Synchronous Buck Bridge, Synchronous Buck Bridge, Synchronous Buck
    Input Max Voltage100 Volt 100 Volt 100 Volt 100 Volt 100 Volt
    Supply Min7.5 Volt 7.5 Volt 7.5 Volt 7.5 Volt 7.5 Volt
    Supply Max14 Volt 14 Volt 14 Volt 14 Volt 14 Volt
    Peak Sink Current2 Amp 3 Amp 3 Amp 2 Amp 2 Amp
    Peak Source Current2 Amp 3 Amp 3 Amp 2 Amp 2 Amp
    Output Rise Time (tr)10 ns 10 ns 10 ns 10 ns 10 ns
    Output Fall Time tf10 ns 10 ns 10 ns 10 ns 10 ns
    Bottom Driver Prop Delay35 ns 25 ns 25 ns 35 ns 35 ns
    TopDriver PropDelay35 ns 25 ns 25 ns 35 ns 35 ns
    PulseWidth Min50 ns 50 ns 50 ns 50 ns 50 ns
    Quiescent Current0.4 mA 0.2 mA 0.2 mA 0.4 mA 0.4 mA
    HighSide DriveYes Yes Yes Yes Yes
    LowSide DriveYes Yes Yes Yes Yes
    Outputs2 2 2 2 2
    LowGate EnableYes No No No No
    UVLOYes Yes Yes Yes Yes
    Shut downNo No No No No
    Internal BootDiodeYes Yes Yes Yes Yes
    On/Off PinNo
    Input ControlSingle PWM Dual, independent Dual, independent Dual, independent Single PWM
    RegTypeMOSFET Driver MOSFET Driver MOSFET Driver MOSFET Driver MOSFET Driver
    Temperature Min-40 deg C -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 125 deg C

    Datasheets
    TitleSizeDateOther
    Language
    LM5105 100V Half Bridge Gate Driver with Programmable Dead-Time367
    Kbytes
    26-May-11   

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5105SD/NOPB

    LM5105SD

    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide7012
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide2425
    FARNELLEurope and Asia1649
    MOUSERWorldwide1409
    NEWARKAmericas503
    TAYLORAmericas7012
    $1.00 each at 1K+ pcsreel
    of
    1000
    LM5105SDX/NOPB

    LM5105SDX

    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide4500
    DIGI-KEYWorldwide0
    $1.00 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 LM5105.

    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 LM5105 is located at RoHS Status.

    Part Number(s)
    (NSID)
    Weight
    (milligrams)
    TypePinsMSL RatingPeak ReflowRoHS
    Status
    CAD SymbolsModelsPackage
    Marking
    Format
    LM5105SD/NOPB

    LM5105SD
    39.757
    39.906
    LLP101
    1
    260
    260
    DetailDownloadN/A
    NS
    UZXYTT
    L5105SD
    LM5105SDX/NOPB

    LM5105SDX
    39.757
    39.906
    LLP101
    1
    260
    260
    DetailDownloadN/A
    NS
    UZXYTT
    L5105SD

    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 LM5105.

    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 LM5105 is located at RoHS Status.

    CAD Symbols and Models
    Download LM5105 CAD Symbols
     Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM5105SDABCD150XV2036010011554964327875145
    LM5105SDXABCD150XV2036010011554964327875145

    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 LM5105.

    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 LM5105 is located at RoHS Status.

    [Information as of 9-Feb-2012]