National Semiconductor | High-performance Analog

 

 LM4510   

Synchronous Step-Up DC/DC Converter with True Shutdown Isolation from the PowerWise® Family
Click link to Download

Features

  • 18V@80 mA from 3.2V input
  • 5V@280 mA from 3.2V input
  • No external Schottky diode required
  • 85% peak efficiency
  • Soft start
  • True shutdown isolation
  • Stable with small ceramic or tantalum output capacitors
  • Output short-circuit protection
  • Feedback fault protection
  • Input under-voltage lock out
  • Thermal shutdown
  • 0.002 µA shutdown current
  • Wide input voltage range: 2.7V to 5.5V
  • 1.0 MHz fixed frequency operation
  • Low-profile 10–pin LLP package (3mm x 3mm x 0.8mm)
  • Description

    The LM4510 is a current mode step-up DC/DC converter with a 1.2A internal NMOS switch designed to deliver up to 120 mA at 16V from a Li-Ion battery.

    The device's synchronous switching operation (no external Schottky diode) at heavy-load, and non-synchronous switching operation at light-load, maximizes power efficiency.

    True shutdown function by synchronous FET and related circuitry ensures input and output isolation.

    A programmable soft-start circuit allows the user to limit the amount of inrush current during startup. The output voltage can be adjusted by external resistors.

    The LM4510 features advanced short-circuit protection to maximize safety during output to ground short condition. During shutdown the feedback resistors and the load are disconnected from the input to prevent leakage current paths to ground.

    The LM4510 is available in a 10-pin thermally enhanced Leadless Leadframe Package: LLP-10.


    Applications

  • Organic LED Panel Power Supply
  • Charging Holster
  • White LED Backlight
  • USB Power Supply
  • Class D Audio Amplifier
  • Camera Flash LED Driver


  • Typical Application Circuit

     

    ParametersValues
    Switch Current 1.2 Amp
    Input Min Voltage 2.7 Volt
    Input Max Voltage 5.5 Volt
    Feedback Voltage 1.265 Volt
    Frequency Max 1000 kHz
    Output Max 18 Volt
    Efficiency (peak) 85 %
    Sync Pin No
    Adj Switch Frequency No
    Frequency Min 85 kHz
    On/Off Pin Yes
    PowerGood / Error Flag No
    SoftStart Yes
    Special Features True shutdown
    Topology Boost
    Step-Up Yes
    Inverting No
    Flyback No
    RegType Switching Regulator
    Adjustable Output Yes
    Output Power 1.4 Watt
    Temperature Min -40 deg C
    Temperature Max 85 deg C
    PowerWise Yes
    Quiescent Current 1.7 mA

    Datasheets
    TitleSizeDateOther
    Language
    LM4510 Synchronous Step-Up DC/DC Converter with True Shutdown Isolation2467
    Kbytes
    30-Jan-10   


    Application Notes
    TitleSizeDateOther
    Language
    AN-1697: Application Note 1697 LM4510 Evaluation Board1052
    Kbytes
    27-Sep-07 
    AN-1777: Application Note 1777 Designing Energy-Efficient Handheld Illumination Solutions156
    Kbytes
    27-Feb-08 中文

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM4510SD/NOPB


    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide1796
    FARNELLEurope and Asia350
    MOUSERWorldwide746
    NEWARKAmericas350
    RS COMPONENTSWorldwide13
    $1.80 each at 1K+ pcsreel
    of
    1000
    LM4510SDX/NOPB


    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $1.80 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 LM4510.

    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 LM4510 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM4510SDEV
    Synchronous Step-Up DC/DC Converter with True Shutdown IsolationFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide2
    $55.00 each1

    Description

    The LM4510 is a current mode step-up DC/DC converter with a 1.2A internal NMOS switch designed to deliver up to 120 mA at 16V from a Li-Ion battery.

    The device`s synchronous switching operation (no external Schottky diode) at heavy-load, and non-synchronous switching operation at light-load, maximizes power efficiency.

    True shutdown function by synchronous FET and related circuitry ensures input and output isolation.

    A programmable soft-start circuit allows the user to limit the amount of inrush current during startup. The output voltage can be adjusted by external resistors.

    The LM4510 features advanced short-circuit protection to maximize safety during output to ground short condition. During shutdown the feedback resistors and the load are disconnected from the input to prevent leakage current paths to ground.

    The evaluation board is designed to provide adjustable output voltage from a single Li-Ion battery. By default, output voltage is set to 16V. Please refer to the datasheet and application note for additional information.

    Features

    • 18V @ 80mA from a 3.2V input
    • 5V @ 280 mA from 3.2V input
    • No external Schottky diode required
    • 85% peak efficiency
    • Soft start
    • True shutdown isolation
    • Stable with small ceramic or tantalum output capacitors
    • Output short-circuit protection
    • Feedback fault protection
    • Input under-voltage lock out
    • Thermal shutdown
    • 0.002 µA shutdown current
    • Wide input voltage range: 2.7V to 5.5V
    • 1.0 MHz fixed frequency

    Applications

    • Organic LED Panel Power Supply
    • Charging Holster
    • White LED Backlight
    • USB Power Supply
    • Class D Audio Amplifier
    • Camera Flash LED Driver



    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
    LM4510SD/NOPB

    21.112
    LLP101260DetailDownloadN/A
    ZXYTT
    L4510
    LM4510SDX/NOPB

    21.112
    21.112
    LLP101260DetailDownloadN/A
    ZXYTT
    L4510

    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 LM4510.

    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 LM4510 is located at RoHS Status.

    CAD Symbols and Models
    Download LM4510 CAD Symbols
     Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM4510SDABCD15004268000639400011814314958
    LM4510SDXABCD15004268000639400011814314958

    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 LM4510.

    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 LM4510 is located at RoHS Status.

    Power for Portable Applications (Boost, Buck-Boost, & Integrated)
    Loading video...


    Power for Portable Applications (Boost, Buck-Boost, & Integrated)
    Date: 2008-01-15
    Length: 0:4:25
    [Information as of 7-Feb-2012]