National Semiconductor | High-performance Analog

 

 LM2735   

520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator
Click link to Download

Features

  • Input voltage range 2.7V to 5.5V
  • Output voltage range 3V to 24V
  • 2.1A switch current over full temperature range
  • Current-Mode control
  • Logic high enable pin
  • Ultra low standby current of 80 nA in shutdown
  • 170 mΩ NMOS switch
  • ±2% feedback voltage accuracy
  • Ease-of-use, small total solution size

  •  Internal soft-start

  •  Internal compensation

  •  Two switching frequencies

  •  520 kHz (LM2735-Y)

  •   1.6 MHz (LM2735-X)

  •  Uses small surface mount inductors and chip capacitors

  •  Tiny SOT23-5, LLP-6, and eMSOP-8 packages
  • LM2735Q is AEC-Q100 Grade 1 qualified and is manufactured on an Automotive Grade Flow
  • Description

    The LM2735 is an easy-to-use, space-efficient 2.1A low-side switch regulator ideal for Boost and SEPIC DC-DC regulation. It provides all the active functions to provide local DC/DC conversion with fast-transient response and accurate regulation in the smallest PCB area. Switching frequency is internally set to either 520kHz or 1.6MHz, allowing the use of extremely small surface mount inductor and chip capacitors while providing efficiencies up to 90%. Current-mode control and internal compensation provide ease-of-use, minimal component count, and high-performance regulation over a wide range of operating conditions. External shutdown features an ultra-low standby current of 80 nA ideal for portable applications. Tiny SOT23-5, LLP-6, and eMSOP-8 packages provide space-savings. Additional features include internal soft-start, circuitry to reduce inrush current, pulse-by-pulse current limit, and thermal shutdown.


    Applications

  • LCD Display Backlighting For Portable Applications
  • OLED Panel Power Supply
  • USB Powered Devices
  • Digital Still and Video Cameras
  • White LED Current Source
  • Automotive
  • WEBENCH® LM2735X
        Min   Max   Range  
      Vin V    2.70 – 5.50V  
      Vout V    3.00 – 24.00V  
      Iout A    ≤ 2.10A  
      Ambient Temp °C    ≤ 100°C  
    Footprint BOM Cost Efficiency
     
     
     
     
    What are WEBENCH® tools?




    Typical Application
    *click for larger image


    Block Diagram
    *click for larger image



    Typical Performance
    *click for larger image


     

    ParametersValues
    Output Range Vin to 24
    Switch Current 2.25 Amp
    Input Min Voltage 2.7 Volt
    Input Max Voltage 5.5 Volt
    Feedback Voltage 1.255 Volt
    Frequency Max 1700, 550 kHz
    Output Min 3 Volt
    Output Max 24 Volt
    Efficiency (peak) 90 %
    Sync Pin No
    Adj Switch Frequency No
    Frequency Min 475, 1500 kHz
    On/Off Pin Yes
    PowerGood / Error Flag No
    SoftStart Yes
    Special Features 12V LLP6 EXP DAP, LLP6 EXP DAP, eMSOP8 EXP DAP, SOT23-5, 12V eMSOP8 EXP DAP, 12V SOT23-5
    Topology Boost, Sepic, FlyBack
    Step-Up Yes
    Flyback Yes
    RegType Switching Regulator
    AEC Q-100 Automotive Grade 1
    Automotive Yes
    Quiescent Current 7, 3.4 mA

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM2735XMF/NOPB


    RoHS Status


    SOT-23
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide2113
    AVNET-EMWorldwide12878
    DIGI-KEYWorldwide4051
    FARNELLEurope and Asia561
    MOUSERWorldwide1980
    NEWARKAmericas663
    RS COMPONENTSWorldwide335
    TAYLORAmericas2113
    $1.25 each at 1K+ pcsreel
    of
    1000
    LM2735XMFX/NOPB


    RoHS Status


    SOT-23
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide3000
    DIGI-KEYWorldwide0
    $1.25 each at 1K+ pcsreel
    of
    3000
    LM2735XMY/NOPB


    RoHS Status


    MINI SOIC EXP PAD
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide2030
    FARNELLEurope and Asia222
    MOUSERWorldwide1000
    NEWARKAmericas110
    RS COMPONENTSWorldwide12
    $1.25 each at 1K+ pcsreel
    of
    1000
    LM2735XMYX/NOPB


    RoHS Status


    MINI SOIC EXP PAD
    Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $1.25 each at 1K+ pcsreel
    of
    3500
    LM2735XQMF/NOPB

    Auto Grade 1
    RoHS Status


    SOT-23
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide1882
    FARNELLEurope and Asia997
    MOUSERWorldwide988
    $1.55 each at 1K+ pcsreel
    of
    1000
    LM2735XQMFX/NOPB

    Auto Grade 1
    RoHS Status


    SOT-23
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $1.55 each at 1K+ pcsreel
    of
    3000
    LM2735XSD/NOPB


    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide2585
    FARNELLEurope and Asia49
    MOUSERWorldwide910
    NEWARKAmericas49
    $1.25 each at 1K+ pcsreel
    of
    1000
    LM2735XSDX/NOPB


    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $1.25 each at 1K+ pcsreel
    of
    4500
    LM2735YMF/NOPB

    LM2735YMF

    RoHS Status


    SOT-23
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide1500
    DIGI-KEYWorldwide2525
    FARNELLEurope and Asia977
    MOUSERWorldwide19
    NEWARKAmericas977
    RS COMPONENTSWorldwide210
    $1.25 each at 1K+ pcsreel
    of
    1000
    LM2735YMFX/NOPB


    RoHS Status


    SOT-23
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $1.25 each at 1K+ pcsreel
    of
    3000
    LM2735YMY/NOPB


    RoHS Status


    MINI SOIC EXP PAD
    Full production
    Lead Time: 8 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1000
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide2874
    MOUSERWorldwide1000
    RS COMPONENTSWorldwide460
    TAYLORAmericas1000
    $1.25 each at 1K+ pcsreel
    of
    1000
    LM2735YMYX/NOPB


    RoHS Status


    MINI SOIC EXP PAD
    Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $1.25 each at 1K+ pcsreel
    of
    3500
    LM2735YQMF/NOPB

    Auto Grade 1
    RoHS Status


    SOT-23
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide2334
    FARNELLEurope and Asia3018
    MOUSERWorldwide989
    $1.55 each at 1K+ pcsreel
    of
    1000
    LM2735YQMFX/NOPB

    Auto Grade 1
    RoHS Status


    SOT-23
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $1.55 each at 1K+ pcsreel
    of
    3000
    LM2735YSD/NOPB


    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1000
    DIGI-KEYWorldwide3381
    MOUSERWorldwide1000
    TAYLORAmericas1000
    $1.25 each at 1K+ pcsreel
    of
    1000
    LM2735YSDX/NOPB


    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $1.25 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 LM2735.

    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 LM2735 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM2735SD3.3EVAL
    520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator LM2735X SEPIC 6-Pin LLP Demo BoardFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide2
    $37.50 each1

    Features:

    • Input voltage range 2.7V to 5.5V
    • Output voltage range 3V to 24V
    • 2.1A switch current over full temperature range
    • Current-Mode control
    • Logic high enable pin
    • Ultra low standby current of 80 nA in shutdown
    • 170Ωm NMOS switch
    • ± 2% feedback voltage accuracy
    • Ease-of-use, small total solution size
            • Internal soft-start
            • Internal compensation
            • Two switching frequencies
            • 520 kHz (LM2735-Y)
            • 1.6 MHz (LM2735-X)
            • Uses small surface mount inductors and chip capacitors
            • Tiny SOT23-5, LLP-6, and eMSOP-8 packages

    Applications:

    • LCD Display Backlighting for Portable Applications
    • OLED Panel Power Supply
    • USB Powered Devices
    • Digital Still and Video Cameras
    • White LED Current Source

    Contents:

    • LM2735 Fully Assembled Evaluation Board
    • LM2735 Evaluation Board Appnote
    • A LM2735 Datasheet

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM2735XMFEVAL/NOPB

    520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator LM2735X Boost 5-Pin SOT23 Demo BoardFull production
    Lead Free (RoHS)

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide1
    $37.50 each1

    Features:

    • Input voltage range 2.7V to 5.5V
    • Output voltage range 3V to 24V
    • 2.1A switch current over full temperature range
    • Current-Mode control
    • Logic high enable pin
    • Ultra low standby current of 80 nA in shutdown
    • 170Ωm NMOS switch
    • ± 2% feedback voltage accuracy
    • Ease-of-use, small total solution size
            • Internal soft-start
            • Internal compensation
            • Two switching frequencies
            • 520 kHz (LM2735-Y)
            • 1.6 MHz (LM2735-X)
            • Uses small surface mount inductors and chip capacitors
            • Tiny SOT23-5, LLP-6, and eMSOP-8 packages

    Applications:

    • LCD Display Backlighting for Portable Applications
    • OLED Panel Power Supply
    • USB Powered Devices
    • Digital Still and Video Cameras
    • White LED Current Source

    Contents:

    • LM2735 Fully Assembled Evaluation Board
    • LM2735 Evaluation Board Appnote
    • A LM2735 Datasheet

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM2735XMYEVAL
    520kHz/1.6MHz Space-Efficient Boost and SEPIC DC-DC Regulator LM2735Y Boost 8-Pin eMSOP Demo BoardFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide1
    $37.50 each1

    Features:

    • Input voltage range 2.7V to 5.5V
    • Output voltage range 3V to 24V
    • 2.1A switch current over full temperature range
    • Current-Mode control
    • Logic high enable pin
    • Ultra low standby current of 80 nA in shutdown
    • 170Ωm NMOS switch
    • ± 2% feedback voltage accuracy
    • Ease-of-use, small total solution size
            • Internal soft-start
            • Internal compensation
            • Two switching frequencies
            • 520 kHz (LM2735-Y)
            • 1.6 MHz (LM2735-X)
            • Uses small surface mount inductors and chip capacitors
            • Tiny SOT23-5, LLP-6, and eMSOP-8 packages

    Contents:

    • LM2735 Fully Assembled Evaluation Board
    • LM2735 Evaluation Board Appnote
    • LM2735 Datasheet

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM2735XSDEVAL
    520kHz/1.6MHz Space-Efficient Boost and SEPIC DC-DC Regulator LM2735X Boost 6-Pin LLP Demo BoardFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide2
    $37.50 each1

    Features:

    • Input voltage range 2.7V to 5.5V
    • Output voltage range 3V to 24V
    • 2.1A switch current over full temperature range
    • Current-Mode control
    • Logic high enable pin
    • Ultra low standby current of 80 nA in shutdown
    • 170Ωm NMOS switch
    • ± 2% feedback voltage accuracy
    • Ease-of-use, small total solution size
            • Internal soft-start
            • Internal compensation
            • Two switching frequencies
            • 520 kHz (LM2735-Y)
            • 1.6 MHz (LM2735-X)
            • Uses small surface mount inductors and chip capacitors
            • Tiny SOT23-5, LLP-6, and eMSOP-8 packages

    Applications:

    • LCD Display Backlighting for Portable Applications
    • OLED Panel Power Supply
    • USB Powered Devices
    • Digital Still and Video Cameras
    • White LED Current Source

    Contents:

    • LM2735 Fully Assembled Evaluation Board
    • LM2735 Evaluation Board Appnote
    • LM2735 Datasheet

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM2735YMFEVAL
    520kHz/1.6MHz Space-Efficient Boost and SEPIC DC-DC Regulator LM2735Y Boost 5-Pin SOT23 Demo BoardFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide2
    $37.50 each1

    Features:

    • Input voltage range 2.7V to 5.5V
    • Output voltage range 3V to 24V
    • 2.1A switch current over full temperature range
    • Current-Mode control
    • Logic high enable pin
    • Ultra low standby current of 80 nA in shutdown
    • 170Ωm NMOS switch
    • ± 2% feedback voltage accuracy
    • Ease-of-use, small total solution size
            • Internal soft-start
            • Internal compensation
            • Two switching frequencies
            • 520 kHz (LM2735-Y)
            • 1.6 MHz (LM2735-X)
            • Uses small surface mount inductors and chip capacitors
            • Tiny SOT23-5, LLP-6, and eMSOP-8 packages

    Applications:

    • LCD Display Backlighting for Portable Applications
    • OLED Panel Power Supply
    • USB Powered Devices
    • Digital Still and Video Cameras
    • White LED Current Source

    Contents:

    • LM2735 Fully Assembled Evaluation Board
    • LM2735 Evaluation Board Appnote
    • LM2735 Datasheet

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM2735YMYEVAL
    520kHz/1.6MHz Space-Efficient Boost and SEPIC DC-DC Regulator LM2735X Boost 8-Pin eMSOP Demo BoardFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide1
    $37.50 each1

    Features:

    • Input voltage range 2.7V to 5.5V
    • Output voltage range 3V to 24V
    • 2.1A switch current over full temperature range
    • Current-Mode control
    • Logic high enable pin
    • Ultra low standby current of 80 nA in shutdown
    • 170Ωm NMOS switch
    • ± 2% feedback voltage accuracy
    • Ease-of-use, small total solution size
            • Internal soft-start
            • Internal compensation
            • Two switching frequencies
            • 520 kHz (LM2735-Y)
            • 1.6 MHz (LM2735-X)
            • Uses small surface mount inductors and chip capacitors
            • Tiny SOT23-5, LLP-6, and eMSOP-8 packages

    Applications:

    • LCD Display Backlighting for Portable Applications
    • OLED Panel Power Supply
    • USB Powered Devices
    • Digital Still and Video Cameras
    • White LED Current Source

    Contents:

    • LM2735 Fully Assembled Evaluation Board
    • LM2735 Evaluation Board Appnote
    • LM2735 Datasheet

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM2735YSDEVAL
    520kHz/1.6MHz Space-Efficient Boost and SEPIC DC-DC Regulator LM2735Y Boost 6-Pin LLP Demo BoardFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide1
    $37.50 each1

    Features:

    • Input voltage range 2.7V to 5.5V
    • Output voltage range 3V to 24V
    • 2.1A switch current over full temperature range
    • Current-Mode control
    • Logic high enable pin
    • Ultra low standby current of 80 nA in shutdown
    • 170Ωm NMOS switch
    • ± 2% feedback voltage accuracy
    • Ease-of-use, small total solution size
            • Internal soft-start
            • Internal compensation
            • Two switching frequencies
            • 520 kHz (LM2735-Y)
            • 1.6 MHz (LM2735-X)
            • Uses small surface mount inductors and chip capacitors
            • Tiny SOT23-5, LLP-6, and eMSOP-8 packages

    Applications:

    • LCD Display Backlighting for Portable Applications
    • OLED Panel Power Supply
    • USB Powered Devices
    • Digital Still and Video Cameras
    • White LED Current Source

    Contents:

    • LM2735 Fully Assembled Evaluation Board
    • LM2735 Evaluation Board Appnote
    • LM2735 Datasheet



    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
    LM2735XMF/NOPB

    14.696
    SOT-2351260DetailDownloadN/A
    SLEB
    XTT
    LM2735XMFX/NOPB

    14.696
    SOT-2351260DetailDownloadN/A
    SLEB
    XTT
    LM2735XMY/NOPB

    29.851
    MINI SOIC EXP PAD81260DetailDownloadN/A
    ZXTT
    SRJB
    LM2735XMYX/NOPB

    29.851
    MINI SOIC EXP PAD81260DetailDownloadN/A
    ZXTT
    SRJB
    LM2735XQMF/NOPB

    14.696
    SOT-2351260DetailDownloadN/A
    SVDB
    XTT
    LM2735XQMFX/NOPB

    14.696
    SOT-2351260DetailDownloadN/A
    SVDB
    XTT
    LM2735XSD/NOPB

    21.032
    LLP61260DetailDownloadN/A
    ZXYTT
    2735X
    LM2735XSDX/NOPB

    21.032
    LLP61260DetailDownloadN/A
    ZXYTT
    2735X
    LM2735YMF/NOPB

    LM2735YMF
    14.696
    14.801
    SOT-2351
    1
    260
    260
    DetailDownloadN/A
    SLFB
    XTT
    LM2735YMFX/NOPB

    14.696
    SOT-2351260DetailDownloadN/A
    SLFB
    XTT
    LM2735YMY/NOPB

    29.851
    MINI SOIC EXP PAD81260DetailDownloadN/A
    ZXTT
    SRKB
    LM2735YMYX/NOPB

    29.851
    MINI SOIC EXP PAD81260DetailDownloadN/A
    ZXTT
    SRKB
    LM2735YQMF/NOPB

    14.696
    SOT-2351260DetailDownloadN/A
    SXUB
    XTT
    LM2735YQMFX/NOPB

    14.696
    SOT-2351260DetailDownloadN/A
    SXUB
    XTT
    LM2735YSD/NOPB

    21.032
    LLP61260DetailDownloadN/A
    ZXYTT
    2735Y
    LM2735YSDX/NOPB

    21.032
    LLP61260DetailDownloadN/A
    ZXYTT
    2735Y

    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 LM2735.

    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 LM2735 is located at RoHS Status.

    CAD Symbols and Models
    Download LM2735 CAD Symbols
     Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM2735XMFPVIP0500142800017550003497986041
    LM2735XMFXPVIP0500142800017550003497986041
    LM2735XMYPVIP0500142800017550003497986041
    LM2735XMYXPVIP0500142800017550003497986041
    LM2735XQMFPVIP0500142800017550003497986041
    LM2735XQMFXPVIP0500142800017550003497986041
    LM2735XSDPVIP0500142800017550003497986041
    LM2735XSDXPVIP0500142800017550003497986041
    LM2735YMFPVIP0500142800017550003497986041
    LM2735YMFXPVIP0500142800017550003497986041
    LM2735YMYPVIP0500142800017550003497986041
    LM2735YMYXPVIP0500142800017550003497986041
    LM2735YQMFPVIP0500142800017550003497986041
    LM2735YQMFXPVIP0500142800017550003497986041
    LM2735YSDPVIP0500142800017550003497986041
    LM2735YSDXPVIP0500142800017550003497986041

    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 LM2735.

    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 LM2735 is located at RoHS Status.

    Power for Portable Applications (Boost, Buck-Boost, & Integrated)
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    Power for Portable Applications (Boost, Buck-Boost, & Integrated)
    Date: 2008-01-15
    Length: 0:4:25
    [Information as of 9-Feb-2012]