National Semiconductor | High-performance Analog

 

 LM5574   
SIMPLE SWITCHER® 75V, 0.5A Step-Down Switching Regulator 		Click link to Download

Features

  • LM5574Q is an Automotive Grade product that is AEC-Q100 grade 1 qualified (−40°C to + 125°C operating junction temperature)
  • Integrated 75V, 750mΩ N-channel MOSFET
  • Ultra-wide input voltage range from 6V to 75V
  • Adjustable output voltage as low as 1.225V
  • 1.5% feedback reference accuracy
  • Operating frequency adjustable between 50kHz and 500kHz with single resistor
  • Master or slave frequency synchronization
  • Adjustable soft-start
  • Emulated current mode control architecture
  • Wide bandwidth error amplifier
  • Built-in protection
  • Automotive Grade product datasheet that is AEC-Q100 grade 0 qualified is available upon request

  • (−40°C to + 150°C operating junction temperature)

    • Description

    The LM5574 is an easy to use SIMPLE SWITCHER® buck regulator which allows design engineers to design and optimize a robust power supply using a minimum set of components. Operating with an input voltage range of 6 - 75V, the LM5574 delivers 0.5A of continuous output current with an integrated 750mΩ N-Channel MOSFET. The regulator utilizes an Emulated Current Mode architecture which provides inherent line regulation, tight load transient response, and ease of loop compensation without the usual limitation of low-duty cycles associated with current mode regulators. The operating frequency is adjustable from 50kHz to 500kHz to allow optimization of size and efficiency. To reduce EMI, a frequency synchronization pin allows multiple IC’s from the LM(2)557x family to self-synchronize or to synchronize to an external clock. The LM5574 guarantees robustness with cycle-by-cycle current limit, short-circuit protection, thermal shut-down, and remote shut-down. The device is available in a TSSOP-16 package. The LM5574 is supported by the full suite of WEBENCH On-Line design tools.


    Applications

  • Automotive
  • Industrial

    • WEBENCH® LM5574
        Min   Max   Range  
      VIN – V    6.00 – 75.00V  
      VOUT V    -65.00 – 75.00V  
      IOUT A    ≤ 0.50A  
      Ambient Temp °C    ≤ 100°C  
    Footprint BOM Cost Efficiency
    What are WEBENCH® tools?


    Also Recommended
    LM25574▲42V Input Voltage Max, 0.5A Output Current
    LM25575▲42V Input Voltage Max, 1.5A Output Current
    LM25576▲42V Input Voltage Max, 3A Output Current
    LM5575▲75V Input Voltage Max, 1.5A Output Current
    LM5576▲75V Input Voltage Max, 3A Output Current



    Parameters / ValuesLM5574 LM25574 LM25575 LM25576 LM5575 LM5576
    Output Current500 mA 500 mA 1500 mA 3000 mA 1500 mA 3000 mA
    Input Min Voltage6 Volt 6 Volt 6 Volt 6 Volt 6 Volt 6 Volt
    Input Max Voltage75 Volt 42 Volt 42 Volt 42 Volt 75 Volt 75 Volt
    Output Min1.23 Volt 1.23 Volt 1.23 Volt 1.23 Volt 1.23 Volt 1.23 Volt
    Output Max70 Volt 40 Volt 40 Volt 40 Volt 70 Volt 70 Volt
    Frequency Min50 kHz 50 kHz 50 kHz 50 kHz 50 kHz 50 kHz
    Frequency Max500 kHz 1000 kHz 1000 kHz 1000 kHz 500 kHz 500 kHz
    Efficiency (peak)85 % 91 % 91 % 91 % 87 % 88 %
    On/Off PinYes Yes Yes Yes Yes Yes
    PowerGood / Error FlagNo No No No No No
    SoftStartYes Yes Yes Yes Yes Yes
    Sync PinYes Yes Yes Yes Yes Yes
    InvertingYes Yes Yes Yes Yes Yes
    FlybackNo No No No No No
    RegTypeSwitching Regulator Switching Regulator Switching Regulator Switching Regulator Switching Regulator Switching Regulator
    Temperature Min-40 deg C -40 deg C -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 125 deg C 125 deg C
    Adjustable OutputYes Yes Yes Yes Yes Yes
    Adj Switch FrequencyYes Yes Yes Yes Yes Yes
    PWM ModeCurrent Current Current Current Current Current
    TopologyBuck Buck Buck Buck Buck Buck
    Special Features1.5% feedback voltage accuracy, emulated current mode 1.5% feedback voltage accuracy, emulated current mode 1.5% feedback voltage accuracy, emulated current mode 1.5% feedback voltage accuracy, emulated current mode 1.5% feedback voltage accuracy, emulated current mode 1.5% feedback voltage accuracy, emulated current mode
    Step-DownYes Yes Yes Yes Yes Yes
    Multiple Output CapabilityNo No No No No No
    Output PowerUndefined Watt Undefined Watt Undefined Watt Undefined Watt Undefined Watt Undefined Watt
    Output VoltageUndefined Volt Undefined Volt Undefined Volt Undefined Volt Undefined Volt Undefined Volt
    Output Range1.23V to 70V 1.23V to 37V 1.23V to 37V 1.23V to 37V 1.23V to 70V 1.23V to 70V
    Switching Frequency500 kHz 1000 kHz 1000 kHz 1000 kHz 500 kHz 500 kHz
    Regulator FamilySIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER
    AEC Q-100 Automotive Grade1 1 1 1 1 1
    AutomotiveYes Yes Yes Yes Yes Yes
    PowerWiseYes Yes Yes Yes Yes Yes
    Synchronous RectificationNo No No No No No
    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5574MT/NOPB

    LM5574MT

    RoHS Status

    TSSOP    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide601
    AVNET-EMWorldwide1245
    CEACAsia Pacific3036
    DIGI-KEYWorldwide4
    FARNELLEurope and Asia2836
    NEWARKAmericas956
    RS COMPONENTSWorldwide35
    TAYLORAmericas601
    		$1.75 each at 1K+ pcsrail
    of
    92
    LM5574MTX/NOPB

    LM5574MTX

    RoHS Status

    TSSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide2151
    AVNET-EMWorldwide2500
    DIGI-KEYWorldwide0
    MOUSERWorldwide2150
    TAYLORAmericas2151
    		$1.75 each at 1K+ pcsreel
    of
    2500
    LM5574QMT/NOPB

    Auto Grade 1
    RoHS Status

    TSSOP    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide184
    AVNET-EMWorldwide154
    DIGI-KEYWorldwide123
    TAYLORAmericas184
    		$1.99 each at 1K+ pcsrail
    of
    92
    LM5574QMTX/NOPB

    Auto Grade 1
    RoHS Status

    TSSOP    		Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.99 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 LM5574.

    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 LM5574 is located at RoHS Status.

    Part Number(s)
    (NSID)    		DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5574BLDT/NOPB

    		LM5574 WEBENCH Build It blank PCBFull production
    Lead Free (RoHS)

     
    DistributorRegionQty
    DIGI-KEYWorldwide30
    MOUSERWorldwide2
    		$16.50 each1

    Part Number(s)
    (NSID)    		DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5574EVAL
    		75V, 0.5A Step-Down Switching RegulatorFull production


     
    DistributorRegionQty
    AVNET-EMWorldwide10
    DIGI-KEYWorldwide12
    MOUSERWorldwide1
    		$37.50 each1

    Features:

    • Integrated 75V, 750Wm N-Channel MOSFET
    • Ultra-wide input voltage range from 6V to 75V
    • Adjustable output voltage as low as 1.225V
    • 1.5% feedback reference accuracy
    • Operating frequency adjustable between 50kHz and 500kHz with single resistor
    • Master or slave frequency synchronization
    • Adjustable soft-start
    • Emulated current mode control architecture
    • Wide bandwidth error amplifier
    • Built-in protection
    • TSSOP-16 Package

    Contenets:




    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
    LM5574MT/NOPB

    LM5574MT
    		56.74
    57
    		TSSOP161
    1    		260
    260    		DetailDownloadN/A
    		NSUZXYTT
    LM5574
    MT
    LM5574MTX/NOPB

    LM5574MTX
    		56.74
    57
    		TSSOP161
    1    		260
    260    		DetailDownloadN/A
    		NSUZXYTT
    LM5574
    MT
    LM5574QMT/NOPB

    		56.74
    		TSSOP161260DetailDownloadN/A
    		NSUZXYTT
    LM5574
    QMT
    LM5574QMTX/NOPB

    		56.74
    		TSSOP161260DetailDownloadN/A
    		NSUZXYTT
    LM5574
    QMT

    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 LM5574.

    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 LM5574 is located at RoHS Status.

    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM5574MTABCD150XV1038680025950002736338335
    LM5574MTXABCD150XV1038680025950002736338335
    LM5574QMTABCD150XV1038680025950002736338335
    LM5574QMTXABCD150XV1038680025950002736338335

    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 LM5574.

    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 LM5574 is located at RoHS Status.

    What's New in Power -- March 2009
    Loading video...


    Motor Control Sensing in Factory Automation
    Loading video...


    Introduction to Emulated Current Mode (ECM) Control and the new SIMPLE SWITCHER® Buck Regulators
    Click image to play video in new window


    What's New in Power -- March 2009
    Date: 2009-03-04
    Length: 0:04:07
    Motor Control Sensing in Factory Automation
    Date: 2009-08-04
    Length: 0:24:21
    Introduction to Emulated Current Mode (ECM) Control and the new SIMPLE SWITCHER® Buck Regulators
    Date: 2007-01-17
    Length: 00:33:00
    [Information as of 7-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation