National Semiconductor | High-performance Analog

 

 LM26003   

3A Switching Regulator with High Efficiency Sleep Mode from the PowerWise® Family
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Features

  • LM26003Q is an Automotive Grade product that is AEC-Q100 grade 1 qualified (-40°C to +125°C operating junction temperature)
  • High efficiency sleep mode
  • 40 µA typical Iq in sleep mode
  • 10.8 µA typical Iq in shutdown mode
  • 3.0V minimum input voltage
  • 4.0V to 38V continuous input range
  • 1.5% reference accuracy
  • Cycle-by-cycle current limit
  • Adjustable Frequency (150 kHz to 500 kHz)
  • Synchronizable to an external clock
  • Power Good Flag
  • Forced PWM function
  • Adjustable Soft-start
  • TSSOP-20 exposed pad package
  • Thermal Shut Down
  • Description

    The LM26003 is a switching regulator designed for the high efficiency requirements of applications with stand-by modes. The device features a low-current sleep mode to maintain efficiency under light-load conditions and current-mode control for accurate regulation over a wide input voltage range. Quiescent current is reduced to 10.8 µA typically in shutdown mode and less than 40 µA in sleep mode. Forced PWM mode is also available to disable sleep mode.

    The LM26003 can deliver up to 3A of continuous load current with a fixed current limit, through the internal N-channel switch. The part has a wide input voltage range of 4.0V to 38V and can operate with input voltages as low as 3V during line transients.

    Operating frequency is adjustable from 150 kHz to 500 kHz with a single resistor and can be synchronized to an external clock.

    Other features include Power good, adjustable soft-start, enable pin, input under-voltage protection, and an internal bootstrap diode for reduced component count.


    Applications

  • Automotive Telematics
  • Navigation systems
  • In-Dash Instrumentation
  • Battery Powered Applications
  • Stand-by power for home gateways/set-top boxes



  • Typical Application
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    Block Diagram
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    Typical Performance
    click for larger image


     

    ParametersValues
    Output Current 3000 mA
    Input Min Voltage 3 Volt
    Input Max Voltage 38 Volt
    Output Min 1.25 Volt
    Output Max 35 Volt
    Frequency Min 150 kHz
    Frequency Max 500 kHz
    Efficiency (peak) 92 %
    On/Off Pin Yes
    PowerGood / Error Flag Yes
    SoftStart Yes
    Sync Pin Yes
    Inverting No
    Flyback No
    RegType Switching Regulator
    Temperature Min -40 deg C
    Temperature Max 125 deg C
    Adjustable Output Yes
    Adj Switch Frequency Yes
    PWM Mode Current
    Topology Buck
    Special Features High efficiency sleep mode, 1.5% output voltage accuracy, Quiescent current 50uA
    Step-Down Yes
    Multiple Output Capability No
    Output Power Undefined Watt
    Output Voltage Undefined Volt
    Output Range 1.25V to 35V
    Switching Frequency Undefined kHz
    Feedback Voltage 1.2 Volt
    Regulator Family Undefined
    AEC Q-100 Automotive Grade 1
    Automotive Yes
    PowerWise Yes
    Synchronous Rectification No
    Quiescent Current .04 mA

    Datasheets
    TitleSizeDateOther
    Language
    LM26003 3A Switching Regulator with High Efficiency Sleep Mode463
    Kbytes
    29-Nov-10日本語  


    Application Notes
    TitleSizeDateOther
    Language
    AN-1884: Application Note 1884 LM26003 Evaluation Board507
    Kbytes
    28-Aug-08 

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM26003MH/NOPB


    RoHS Status


    TSSOP EXP PAD
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide126
    DIGI-KEYWorldwide331
    MOUSERWorldwide146
    TAYLORAmericas126
    $3.52 each at 1K+ pcsrail
    of
    73
    LM26003MHX/NOPB


    RoHS Status


    TSSOP EXP PAD
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $3.52 each at 1K+ pcsreel
    of
    2500
    LM26003QMH/NOPB

    Auto Grade 1
    RoHS Status


    TSSOP EXP PAD
    Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide86
    DIGI-KEYWorldwide153
    MOUSERWorldwide146
    $3.69 each at 1K+ pcsrail
    of
    73
    LM26003QMHX/NOPB

    Auto Grade 1
    RoHS Status


    TSSOP EXP PAD
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $3.69 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 LM26003.

    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 LM26003 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM26003EVAL
    LM26003 - 3A Switching Regulator with High Efficiency Sleep ModeFull production


     
    DistributorRegionQty
    MOUSERWorldwide2
    $62.00 each1

    Description:

    The LM26003 evaluation board is designed to demonstrate the capabilities of the LM26003 switching regulator. The LM26003 eval board can be configured to provide an output of 3.3V at up to 3A from the input range of 4V to 38V. The nominal operating frequency is 300kHz and can be synchronized from +30% to -20% of nominal using the SYNC connection post. The evaluation board is designed to operate at ambient temperatures up to 75°C.

    To aid in the design and evaluation of dc/dc buck converters based on the LM26003 regulator, the evaluation board can be re-configured for different output voltages and operating frequencies.

    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
    LM26003MH/NOPB

    73.061
    TSSOP EXP PAD201260DetailDownloadN/A
    NSUZXYTT
    LM26003
    MH
    LM26003MHX/NOPB

    73.061
    TSSOP EXP PAD201260DetailDownloadN/A
    NSUZXYTT
    LM26003
    MH
    LM26003QMH/NOPB

    73.061
    TSSOP EXP PAD201260DetailDownloadN/A
    NSUZXYTT
    LM26003
    QMH
    LM26003QMHX/NOPB

    73.061
    TSSOP EXP PAD201260DetailDownloadN/A
    NSUZXYTT
    LM26003
    QMH

    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 LM26003.

    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 LM26003 is located at RoHS Status.

    CAD Symbols and Models
    Download LM26003 CAD Symbols
     Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM26003MHABCD15004268000639400011814314958
    LM26003MHXABCD15004268000639400011814314958
    LM26003QMHABCD15004268000639400011814314958
    LM26003QMHXABCD15004268000639400011814314958

    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 LM26003.

    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 LM26003 is located at RoHS Status.

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


    Requirements and Solutions for Automotive Power Management Applications
    Date: 2008-02-17
    Length: 00:40:00
    [Information as of 9-Feb-2012]