National Semiconductor | High-performance Analog

 

 LM26400Y   
Dual 2A, 500kHz Wide Input Range Buck Regulator 		Click link to Download

Features

  • Input voltage range of 3-20V
  • Dual 2A output
  • Output voltage down to 0.6V
  • Internal compensation
  • 500kHz PWM frequency
  • Separate enable pins
  • Separate soft start pins
  • Frequency foldback protection
  • 175mΩ NMOS switch
  • Integrated bootstrap diodes
  • Over-current protection
  • ETSSOP and LLP packages
  • Thermal shutdown

    • Description

    The LM26400Y is a monolithic, two-output fixed frequency PWM step-down DC/DC regulator in a 16-pin LLP or thermally enhanced ETSSOP package. With a minimum number of external components and internal loop compensation, the LM26400Y is easy to use. The ability to drive 2A loads with an internal 175mΩ NMOS switch using state-of-the-art 0.5µm BiCMOS technology results in a high-power density design. The world class control circuitry allows for an ON-time as low as 40 ns, thus supporting high-frequency conversion over the entire input range of 3V to 20V and down to an output voltage of only 0.6V. The LM26400Y utilizes peak current-mode control and internal compensation to provide high-performance regulation over a wide range of line and load conditions. Switching frequency is internally set to 500kHz, optimal for a broad range of applications in terms of size versus thermal tradeoffs. Given a non-synchronous architecture, efficiencies above 90% are easy to achieve. External shutdown is included, enabling separate turn-on and turn-off of the two channels. Additional features include programmable soft-start circuitry to reduce inrush current, pulse-by-pulse current limit and frequency foldback, integrated bootstrap structure and thermal shutdown.


    Applications

  • DTV-LCD
  • Set-Top Box
  • XDSL
  • Automotive
  • Computing Peripherals
  • Industrial Controls
  • Point of Load

    • Also Recommended
    LM264205Vin, Dual 2A Synchronous Buck With Power Good And Enable For Each Channel
    LP3906▲Two 1.5A Switching Outputs Plus Two LDO Outputs


    Vin = 5V to 20V, Vout = 1.2V at 2A and 2.5V at 2A

    Parameters / ValuesLM26400Y LP3906
    Channels2 Channels 4 Channels
    Output Range0.6 to 16V LDOs: 1.0 to 3.5V; Buck: 0.8 to 3.5V
    Output1 TopologyBuck Buck
    Output2 TopologyBuck Buck
    Input Min Voltage3 Volt 2.7 Volt
    Input Max Voltage20 Volt 5.5 Volt
    Frequency Min520 kHz
    Frequency Max520 kHz
    Adj Switch FrequencyNo Yes
    Output1 VoutMin0.6 Volt
    Output1 VoutMax16 Volt 2.0 Volt
    Output1 IoutMax2000 mA 1500 mA
    Output2 VoutMin0.6 Volt 1.0 Volt
    Output2 VoutMax16 Volt 3.5 Volt
    Output2 IoutMax2000 mA 1500 mA
    Sync PinNo Yes
    MOSFET Rdson175 mohm
    SoftStartYes
    On/Off PinYes Yes
    PowerGood / Error FlagNo No
    Topologypeak-current mode Buck, LDO
    RegTypeSwitching Regulator Power Management Unit
    Step-DownYes Yes
    Step-UpNo No
    InvertingNo No
    FlybackNo No
    Switching Frequency520 kHz 2000 kHz
    Multiple Output CapabilityYes Yes
    Temperature Min-40 deg C -40 deg C
    Temperature Max125 deg C 85 deg C

    Datasheets
    TitleSizeDateOther
    Language
    LM26400Y Dual 2A, 500kHz Wide Input Range Buck Regulator2456
    Kbytes    		24-Aug-07日本語  


    Application Notes
    TitleSizeDateOther
    Language


    Other Technical Documents
    TitleTypeDate
    Reducing Buck Converter Input Capacitance through Multi-Phasing and Clock SynchronizationExternal Article 2008-01-28

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM26400YMH/NOPB


    RoHS Status

    TSSOP EXP PAD    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide1777
    DIGI-KEYWorldwide206
    FARNELLEurope and Asia1017
    MOUSERWorldwide83
    NEWARKAmericas997
    		$2.25 each at 1K+ pcsrail
    of
    92
    LM26400YMHX/NOPB


    RoHS Status

    TSSOP EXP PAD    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide2500
    CEACAsia Pacific2500
    DIGI-KEYWorldwide0
    RSL MICROAsia Pacific10000
    TAYLORAmericas2500
    		$2.25 each at 1K+ pcsreel
    of
    2500
    LM26400YSD/NOPB

    LM26400YSD

    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1000
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide3174
    FARNELLEurope and Asia648
    MOUSERWorldwide1000
    TAYLORAmericas1000
    		$2.25 each at 1K+ pcsreel
    of
    1000
    LM26400YSDE/NOPB


    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide0
    RS COMPONENTSWorldwide73
    		$2.25 each at 1K+ pcsreel
    of
    250
    LM26400YSDX/NOPB

    LM26400YSDX

    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$2.25 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 LM26400Y.

    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 LM26400Y is located at RoHS Status.

    Part Number(s)
    (NSID)    		DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM26400YEVAL/NOPB

    		Dual 2A, 500kHz Wide Input Range Buck RegulatorFull production
    Lead Free (RoHS)

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide1
    TAYLORAmericas2
    		$54.00 each1

    Features:

    • Input voltage range of 3-20V
    • Dual 2A output
    • Output voltage down to 0.6V
    • Internal compensation
    • 500kHz PWM frequency
    • Separate enable pins
    • Separate soft start pins
    • Frequency foldback protection
    • 175mΩ NMOS switch
    • Integrated bootstrap diodes
    • Over-current protection
    • ETSSOP and LLP packages
    • Thermal shutdown

    Applications:

    • DTV-LCD
    • Set-Top Box
    • XDSL
    • Automotive
    • Computing Peripherals
    • Industrial Controls
    • Point of Load

    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
    LM26400YMH/NOPB

    		56.396
    56.606
    		TSSOP EXP PAD161260DetailDownloadN/A
    		NSUZXYTT
    L26400
    YMH
    LM26400YMHX/NOPB

    		56.396
    56.606
    		TSSOP EXP PAD161260DetailDownloadN/A
    		NSUZXYTT
    L26400
    YMH
    LM26400YSD/NOPB

    LM26400YSD
    		64.927
    65.192
    		LLP161
    3    		260
    260    		DetailDownloadN/A
    		NS
    UZXYTT
    L26400Y
    LM26400YSDE/NOPB

    		64.927
    65.192
    		LLP161260DetailDownloadN/A
    		NS
    UZXYTT
    L26400Y
    LM26400YSDX/NOPB

    LM26400YSDX
    		64.927
    65.192
    		LLP161
    1    		260
    260    		DetailDownloadN/A
    		NS
    UZXYTT
    L26400Y

    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 LM26400Y.

    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 LM26400Y is located at RoHS Status.

    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM26400YMHPVIP0500142800017550003497986041
    LM26400YMHXPVIP0500142800017550003497986041
    LM26400YSDPVIP0500142800017550003497986041
    LM26400YSDEPVIP0500142800017550003497986041
    LM26400YSDXPVIP0500142800017550003497986041

    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 LM26400Y.

    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 LM26400Y is located at RoHS Status.

    [Information as of 7-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation