National Semiconductor | High-performance Analog

 

 LM5015   
High Voltage Monolithic Two-Switch Forward DC-DC Regulator 		Click link to Download

Features

  • Dual Integrated 75V N-Channel MOSFETs
  • Ultra-wide input voltage range: 4.25V to 75V
  • Integrated high voltage bias regulator
  • Adjustable output voltage
  • 1.5% feedback reference accuracy
  • Current mode control with selectable compensation
  • Wide bandwidth error amplifier
  • Integrated current sensing and limiting
  • 50% maximum duty cycle limit
  • Single resistor oscillator programming
  • Oscillator synchronization capability
  • Programmable soft-start
  • Enable / Under-voltage Lockout (UVLO) pin
  • Thermal shutdown

    • Description

    The LM5015 high voltage switch mode regulator features all the functions necessary to implement efficient high voltage Two-Switch Forward and Two-Switch Flyback regulators, using a minimum of external components. This easy to use regulator integrates high side and low side 75 Volt N-Channel MOSFETs with a minimum 1 Amp peak current limit. The voltage across the MOSFETs employed in the two-switch topology is clamped to the input voltage, allowing the input voltage range to approach the rating of the MOSFETs. The regulator control method is based on current mode control providing inherent ease of loop compensation and line feed-forward for superior rejection of input transients.

    The operating frequency is set with a single resistor and is programmable up to 750 kHz. The oscillator can also be synchronized to an external clock. Additional protection features include cycle-by-cycle current limiting, thermal shutdown, under-voltage lockout and remote shutdown capability. The device is available in the TSSOP-14EP package featuring an exposed die attach pad to enhance thermal dissipation.

    Also Recommended
    LM5001▲High Voltage Single-Switch Regulator



    Typical Application
    click for larger image


    		Connection Diagram
    click for larger image



    Typical Performance
    click for larger image


    Parameters / ValuesLM5015 LM5001
    Output RangeUndefined Undefined
    Switch Current1.2 Amp 1 Amp
    Input Min Voltage4.25 Volt 3.1 Volt
    Input Max Voltage75 Volt 75 Volt
    Frequency Max750 kHz 1500 kHz
    Output MinUndefined Volt Undefined Volt
    Output MaxUndefined Volt Undefined Volt
    Efficiency (peak)87 % 96 %
    Sync PinYes Yes
    Adj Switch FrequencyYes Yes
    Frequency Min25 kHz 50 kHz
    On/Off PinYes Yes
    PowerGood / Error FlagNo No
    SoftStartYes No
    PWM ModeCurrent Mode Current Mode
    TopologyTwo-Switch Forward Boost, Flyback, Forward, SEPIC
    Step-UpYes Yes
    InvertingYes No
    FlybackYes Yes
    RegTypeSwitching Regulator Switching Regulator
    Adjustable OutputYes Yes
    Output PowerUndefined Watt Undefined Watt
    Temperature Min-40 deg C -40 deg C
    Temperature Max125 deg C 125 deg C
    Quiescent Current0.11 mA 0.095 mA

    Datasheets
    TitleSizeDateOther
    Language
    LM5015 High Voltage Monolithic Two-Switch Forward DC-DC Regulator390
    Kbytes    		15-Jan-09日本語  


    Application Notes
    TitleSizeDateOther
    Language
    AN-1724: Application Note 1724 LM5015 Isolated Two-Switch DC-DC Regulator Evaluation Board167
    Kbytes    		29-Oct-07 
    AN-1725: Application Note 1725 LM5015 Non-Isolated Two-Switch DC-DC Regulator Evaluation Board161
    Kbytes    		29-Oct-07 


    Other Technical Documents
    TitleTypeDate
    Operation & Benefits of Two-Switch Forward/Flyback Power Converter TopologiesExternal Article 2008-08-24
    Two-Switch Topology Boosts Forward, Flyback DesignsExternal Article 2008-01-19

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5015MH/NOPB


    RoHS Status

    TSSOP EXP PAD    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide994
    AVNET-EMWorldwide209
    DIGI-KEYWorldwide619
    FARNELLEurope and Asia252
    RS COMPONENTSWorldwide69
    TAYLORAmericas994
    		$2.05 each at 1K+ pcsrail
    of
    94
    LM5015MHE/NOPB


    RoHS Status

    TSSOP EXP PAD    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$2.05 each at 1K+ pcsreel
    of
    250
    LM5015MHX/NOPB


    RoHS Status

    TSSOP EXP PAD    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$2.05 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 LM5015.

    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 LM5015 is located at RoHS Status.

    Part Number(s)
    (NSID)    		DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5015ISOEVAL
    		High Voltage Monolithic Two-Switch Forward Isolated DC-DC Converter Evaluation BoardFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide2
    		$70.00 each1

    Features:

    • Input voltage: 36V to 72V
    • Isolated output voltage: 5V
    • Output current: 0A minimum, 2.5A nominal, and 3A maximum
    • Input UVLO threshold: 34V nominal
    • Measured efficiency: 86% (VIN = 48V, IOUT = 2.5A)
    • Switching frequency: 300 kHz
    • Ability to synchronize to external clock
    • Ability to be remote controlled (enable/disable)
    • Two layer PC board and top side component placement configurable as either forward (factory default) or a flyback regulator
    • Board size (WxLxH): 2.5 in. x 3.5 in. x 0.63 in

    Contents:

    • LM5015ISO Fully Assembled Evaluation Board
    • LM5015 Datasheet
    • LM5015ISO Evaluation Board Appnote

    Part Number(s)
    (NSID)    		DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5015NISOEVAL
    		High Voltage Monolithic Two-Switch Forward DC-DC Converter Evaluation BoardFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide1
    		$60.00 each1

    Features:

    • Input voltage: 36V to 72V
    • Isolated output voltage: 5V
    • Output current: 0A minimum, 2.5A nominal, and 3A maximum
    • Input UVLO threshold: 34V nominal
    • Measured efficiency: 86% (VIN = 48V, IOUT = 2.5A)
    • Switching frequency: 300 kHz
    • Ability to synchronize to external clock
    • Ability to be remote controlled (enable/disable)
    • Two layer PC board and top side component placement configurable as either a forward (factory default) or a flyback regulator
    • Board size (WxLxH): 2.5 in. x 3.5 in. x 0.63 in

    Contents:

    • A LM5015NISO Fully Assembled Evaluation Board
    • A LM5015 Datasheet
    • A LM5015NISO 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
    LM5015MH/NOPB

    		53.783
    54.004
    		TSSOP EXP PAD141260DetailDownloadN/A
    		NSUZXYTT
    LM5015
    MH
    LM5015MHE/NOPB

    		53.783
    		TSSOP EXP PAD141260DetailDownloadN/A
    		NSUZXYTT
    LM5015
    MH
    LM5015MHX/NOPB

    		53.783
    54.004
    		TSSOP EXP PAD141260DetailDownloadN/A
    		NSUZXYTT
    LM5015
    MH

    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 LM5015.

    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 LM5015 is located at RoHS Status.

    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM5015MHABCD150XV1038680025950002736338335
    LM5015MHEABCD150XV1038680025950002736338335
    LM5015MHXABCD150XV1038680025950002736338335

    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 LM5015.

    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 LM5015 is located at RoHS Status.

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