National Semiconductor | High-performance Analog

 

 LM25010   
42V, 1.0A Step-Down Switching Regulator 		Click link to Download

Features

  • Wide 6V to 42V Input Voltage Range
  • Valley Current Limiting At 1.25A
  • Programmable Switching Frequency Up To 1 MHz
  • Integrated N-Channel Buck Switch
  • Integrated High Voltage Bias Regulator
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Nearly Constant Operating Frequency With Line and Load Variations
  • Adjustable Output Voltage
  • 2.5V, ±2% Feedback Reference
  • Programmable Soft-Start
  • Thermal shutdown
  • LM25010Q is AEC-Q100 Grade 1 & 0 qualified

    • Description

    The LM25010 features all the functions needed to implement a low cost, efficient, buck regulator capable of supplying in excess of 1A load current. This high voltage regulator integrates an N-Channel Buck Switch, and is available in thermally enhanced LLP-10 and TSSOP-14EP packages. The constant on-time regulation scheme requires no loop compensation resulting in fast load transient response and simplified circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The valley current limit detection is set at 1.25A. Additional features include: VCC under-voltage lock-out, thermal shutdown, gate drive under-voltage lock-out, and maximum duty cycle limiter.

    WEBENCH® LM25010
        Min   Max   Range  
      VIN – V    6.00 – 42.00V  
      VOUT V    2.50 – 42.00V  
      IOUT A    ≤ 1.00A  
      Ambient Temp °C    ≤ 100°C  
    Footprint BOM Cost Efficiency
    What are WEBENCH® tools?


    Also Recommended
    LM25005▲2.5A 42V Switching Regulator
    LM25007▲0.5A 42V Switching Regulator
    LM5010▲Higher Voltage Range (80V) Version



    Typical Application
    click for larger image


    		Block Diagram
    click for larger image



    Typical Performance
    *click for larger image


    Parameters / ValuesLM25010 LM25005 LM25007 LM5010
    Output Current1000 mA 2500 mA 500 mA 1000 mA
    Input Min Voltage6 Volt 7 Volt 9 Volt 8 Volt
    Input Max Voltage42 Volt 42 Volt 42 Volt 75 Volt
    Output Min2.5 Volt 1.23 Volt 2.5 Volt 2.5 Volt
    Output Max37 Volt 37 Volt 37 Volt 70 Volt
    Frequency Min50 kHz 50 kHz 50 kHz 50 kHz
    Frequency Max1000 kHz 500 kHz 800 kHz 1000 kHz
    Efficiency (peak)95 % 94 % 93 % 91 %
    On/Off PinYes Yes Yes Yes
    PowerGood / Error FlagNo No No No
    SoftStartYes Yes No Yes
    Sync PinNo Yes No No
    InvertingYes Yes Yes Yes
    FlybackNo No No No
    RegTypeSwitching Regulator Switching Regulator Switching Regulator Switching Regulator
    Temperature Min-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
    Adjustable OutputYes Yes Yes Yes
    Adj Switch FrequencyYes Yes Yes Yes
    PWM ModeConstant on-time Current Constant on-time Constant on-time
    TopologyBuck Buck, Inverting Buck Buck
    Special FeaturesUltra-fast transient response 1.5% feedback voltage accuracy, emulated current mode Internal startup regulator for Vin>9V, internal 42V/07A N-FET, Pull Ron pin to ground for shutdown No compensation required, ultra-fast transient response
    Step-DownYes Yes Yes Yes
    Multiple Output CapabilityNo No No No
    Output PowerUndefined Watt Undefined Watt Undefined Watt
    Output VoltageUndefined Volt Undefined Volt Undefined Volt
    Output Range2.5V to 37V 1.23V to 37V 2.5V to 37V 2.5V to 70V
    Switching Frequency1000 kHz 500 kHz 800 kHz 1000 kHz
    Feedback Voltage2.5 Volt 1.225 Volt 2.5 Volt 2.5 Volt
    Regulator FamilyUndefined Undefined Undefined
    AEC Q-100 Automotive Grade1
    AutomotiveYes Yes Yes Undefined
    Synchronous RectificationNo No No No

    Datasheets
    TitleSizeDateOther
    Language
    LM25010 42V, 1.0A Step-Down Switching Regulator405
    Kbytes    		2-Dec-08日本語  


    Application Notes
    TitleSizeDateOther
    Language
    AN-1431: Application Note 1431 LM25010 Evaluation Board632
    Kbytes    		19-Dec-05 


    Other Technical Documents
    TitleTypeDate
    Buck Regulator Topologies for Wide Input/Output Voltage DifferentialsPower Designer 2007-03-28

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM25010MH/NOPB

    LM25010MH

    RoHS Status

    TSSOP EXP PAD    		Full production
    Lead Time: 8 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide272
    AVNET-EMWorldwide923
    DIGI-KEYWorldwide722
    FARNELLEurope and Asia478
    MOUSERWorldwide470
    TAYLORAmericas384
    		$1.30 each at 1K+ pcsrail
    of
    94
    LM25010MHX/NOPB

    LM25010MHX

    RoHS Status

    TSSOP EXP PAD    		Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide2500
    		$1.30 each at 1K+ pcsreel
    of
    2500
    LM25010Q0MH/NOPB

    Auto Grade 0
    RoHS Status

    TSSOP EXP PAD    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide39
    MOUSERWorldwide282
    		$1.63 each at 1K+ pcsrail
    of
    94
    LM25010Q0MHX/NOPB

    Auto Grade 0
    RoHS Status

    TSSOP EXP PAD    		Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.63 each at 1K+ pcsreel
    of
    2500
    LM25010Q1MH/NOPB

    Auto Grade 1
    RoHS Status

    TSSOP EXP PAD    		Full production
    Lead Time: 8 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide167
    MOUSERWorldwide282
    		$1.50 each at 1K+ pcsrail
    of
    94
    LM25010Q1MHX/NOPB

    Auto Grade 1
    RoHS Status

    TSSOP EXP PAD    		Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.50 each at 1K+ pcsreel
    of
    2500
    LM25010SD/NOPB

    LM25010SD

    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide5000
    AVNET-EMWorldwide2000
    DIGI-KEYWorldwide1714
    FARNELLEurope and Asia894
    MOUSERWorldwide989
    NEWARKAmericas894
    TAYLORAmericas5000
    		$1.30 each at 1K+ pcsreel
    of
    1000

    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 LM25010.

    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 LM25010 is located at RoHS Status.

    Part Number(s)
    (NSID)    		DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM25010EVAL
    		Evaluation Boards for 42V, 1.0A Step-Down Switching RegulatorFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide1
    		$54.00 each1

    Description:

    LM25010 42V, 1.0A Step-Down Switching Regulator

    Features:

    • Wide 6V to 42V Input Voltage Range
    • Valley Current Limiting at 1.25A
    • Programmable Switching Frequency Up to 1MHz
    • Integrated High Voltage Bias Regulator
    • No Loop Compensation Required
    • Ultra-Fast Transient Response
    • Nearly Constant Operating Frequency with Line and Load Variations
    • Adjustable Output Voltage
    • 2.5V, ±2% Feedback Reference
    • Programmable Soft-Start
    • Thermal Shutdown

    Applications:

    • Non-Isolated Telecommunications Regulator
    • Secondary Side Post Regulator
    • Power Supply for Automotive Electronics

    contents:

    • A fully assembled LM25010 evaluation board
    • LM25010 datasheet
    • LM25010 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
    LM25010MH/NOPB

    LM25010MH
    		53.783
    54.004
    		TSSOP EXP PAD141
    1    		260
    260    		DetailDownloadN/A
    		NSUZXYTT
    L25010
    MH
    LM25010MHX/NOPB

    LM25010MHX
    		53.783
    54.004
    		TSSOP EXP PAD141
    1    		260
    260    		DetailDownloadN/A
    		NSUZXYTT
    L25010
    MH
    LM25010Q0MH/NOPB

    		53.783
    		TSSOP EXP PAD141260DetailDownloadN/A
    		NSUZXYTT
    L25010
    Q0MH
    LM25010Q0MHX/NOPB

    		53.783
    		TSSOP EXP PAD141260DetailDownloadN/A
    		NSUZXYTT
    L25010
    Q0MH
    LM25010Q1MH/NOPB

    		53.783
    		TSSOP EXP PAD141260DetailDownloadN/A
    		NSUZXYTT
    L25010
    Q1MH
    LM25010Q1MHX/NOPB

    		53.783
    		TSSOP EXP PAD141260DetailDownloadN/A
    		NSUZXYTT
    L25010
    Q1MH
    LM25010SD/NOPB

    LM25010SD
    		39.757
    39.906
    		LLP101
    1    		260
    260    		DetailDownloadN/A
    		NS
    UZXYTT
    25010SD

    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 LM25010.

    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 LM25010 is located at RoHS Status.

    Design Tools
    TitleSizeDate
    LM25010 Quick Start Calculator  

    CAD Symbols and Models
    Download LM25010 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM25010MHABCD150XV1038680025950002736338335
    LM25010MHXABCD150XV1038680025950002736338335
    LM25010Q0MHABCD150XV1038680025950002736338335
    LM25010Q0MHXABCD150XV1038680025950002736338335
    LM25010Q1MHABCD150XV1038680025950002736338335
    LM25010Q1MHXABCD150XV1038680025950002736338335
    LM25010SDABCD150XV1038680025950002736338335

    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 LM25010.

    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 LM25010 is located at RoHS Status.

    [Information as of 8-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation