National Semiconductor | High-performance Analog

 

 LM22676   
3A SIMPLE SWITCHER®, Step-Down Voltage Regulator with Precision Enable 		Click link to Download

Features

  • Wide input voltage range: 4.5V to 42V
  • Internally compensated voltage mode control
  • Stable with low ESR ceramic capacitors
  • 120 mΩ N-channel MOSFET TO-263 THIN package
  • 100 mΩ N-channel MOSFET PSOP-8 package
  • Output voltage options:

  •  -ADJ (outputs as low as 1.285V)

  •  -5.0 (output fixed to 5V)
  • ±1.5% feedback reference accuracy
  • Switching frequency of 500 kHz
  • -40°C to 125°C operating junction temperature range
  • Precision enable pin
  • Integrated boot diode
  • Integrated soft-start
  • Fully WEBENCH ® enabled
  • Step-down and inverting buck-boost applications
  • LM22676Q is an Automotive Grade product that is AEC-Q100 grade 1 qualified (-40°C to +125°C operating junction temperature)

    • Description

    The LM22676 series of regulators are monolithic integrated circuits which provide all of the active functions for a step-down (buck) switching regulator capable of driving up to 3A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance N-channel MOSFET. The series consists of a fixed 5V output and an adjustable version.

    The SIMPLE SWITCHER ® concept provides for an easy to use complete design using a minimum number of external components and National’s WEBENCH ® design tool. National’s WEBENCH ® tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy design-in. The switching clock frequency is provided by an internal fixed frequency oscillator which operates at 500 kHz. The LM22676 series also has built in thermal shutdown, current limiting and an enable control input that can power down the regulator to a low 25 µA quiescent current standby condition.


    Applications

  • Industrial Control
  • Telecom and Datacom Systems
  • Embedded Systems
  • Automotive Telematics and Body Electronics
  • Conversions from Standard 24V, 12V and 5V Input Rails

    • WEBENCH® LM22676
        Min   Max   Range  
      VIN – V    4.50 – 42.00V  
      VOUT V    1.28 – 37.00V  
      IOUT A    ≤ 3.00A  
      Ambient Temp °C    ≤ 100°C  
    Footprint BOM Cost Efficiency
    What are WEBENCH® tools?


    Also Recommended
    LM22670▲Features Adjustable Switching Frequency Or Frequency Sync Up To 1MHz And Precision Enable
    LM22673▲Features Adjustable Soft-Start And Adjustable Current Limit
    LM22674▲0.5A Version
    LM22675▲1A Version
    LM22678▲5A Version
    LM22680▲2A Version



    Parameters / ValuesLM22676 LM22670 LM22673 LM22674 LM22675 LM22678 LM22680
    Output Current3000 mA 3000 mA 3000 mA 500 mA 1000 mA 5000 mA 2000 mA
    Input Min Voltage4.5 Volt 4.5 Volt 4.5 Volt 4.5 Volt 4.5 Volt 4.5 Volt 4.5 Volt
    Input Max Voltage42 Volt 42 Volt 42 Volt 42 Volt 42 Volt 42 Volt 42 Volt
    Output Min1.285 Volt 1.285 Volt 1.285 Volt 1.285 Volt 1.285 Volt 1.285 Volt 1.285 Volt
    Efficiency (peak)92 % 92 % 92 % 91 % 92 % 92 % 89 %
    On/Off PinYes Yes No Yes Yes Yes Yes
    PowerGood / Error FlagNo No No No No No No
    SoftStartNo No Yes No No No Yes
    Sync PinNo Yes No No No No Yes
    InvertingYes Yes Yes Yes Yes Yes
    FlybackNo No No No No No No
    RegTypeSwitching Regulator Switching 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 -40 deg C
    Temperature Max125 deg C 125 deg C 125 deg C 125 deg C 125 deg C 125 deg C 125 deg C
    Adjustable OutputYes Yes Yes Yes Yes Yes Yes
    Adj Switch FrequencyNo Yes No No No No Yes
    PWM ModeVoltage Mode Control Voltage Mode Control Voltage Mode Control Voltage Mode Control Voltage Mode Control Voltage Mode Control Voltage Mode Control
    TopologyBuck Buck Buck Buck Buck Buck Buck
    Special Features500 kHz Switching Frequency 500 kHz Default Switching Frequency Adjustable Current Limit 500 kHz Default Switching Frequency, 500 kHz Switching Frequency 500 kHz Switching Frequency 500 kHz Switching Frequency
    Step-DownYes Yes Yes Yes Yes Yes Yes
    Multiple Output CapabilityNo No No No No No No
    Switching Frequency500 kHz 500 kHz 500 kHz 500 kHz 500 kHz 500 kHz 500 kHz
    Feedback Voltage1.285 Volt 1.285 Volt 1.285 Volt 1.285 Volt 1.285 Volt 1.285 Volt 1.285 Volt
    Regulator FamilySIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER
    AutomotiveNo No No No No No
    PowerWiseNo No No No No No No
    Synchronous RectificationNo No No No No No No

    Datasheets
    TitleSizeDateOther
    Language
    LM22676 3A SIMPLE SWITCHER®, Step-Down Voltage Regulator with Precision Enable645
    Kbytes    		10-Dec-10日本語
    中文


    Application Notes
    TitleSizeDateOther
    Language
    AN-1889: Application Note 1889 How to Measure the Loop Transfer Function of Power Supplies612
    Kbytes    		14-Oct-08 
    AN-1930: Application Note 1930 SIMPLE SWITCHER® Regulators Take Over Automotive Applications85
    Kbytes    		7-Jan-09 


    Other Technical Documents
    TitleTypeDate
    SIMPLE SWITCHER® Design GuideDesign Guide 2011-04-11

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM22676MR-5.0/NOPB


    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide1385
    AVNET-EMWorldwide742
    DIGI-KEYWorldwide0
    MOUSERWorldwide212
    TAYLORAmericas1385
    		$1.92 each at 1K+ pcsrail
    of
    95
    LM22676MR-ADJ/NOPB


    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide4710
    AVNET-EMWorldwide233
    CEACAsia Pacific30000
    DIGI-KEYWorldwide0
    FARNELLEurope and Asia1904
    KEIKONGAsia Pacific890
    MOUSERWorldwide429
    TAYLORAmericas4710
    		$1.92 each at 1K+ pcsrail
    of
    95
    LM22676MRE-5.0/NOPB


    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1020
    AVNET-EMWorldwide190
    DIGI-KEYWorldwide3049
    MOUSERWorldwide696
    TAYLORAmericas1020
    		$1.92 each at 1K+ pcsreel
    of
    250
    LM22676MRE-ADJ/NOPB


    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide528
    AVNET-EMWorldwide2304
    DIGI-KEYWorldwide2336
    FARNELLEurope and Asia523
    MOUSERWorldwide708
    NEWARKAmericas428
    TAYLORAmericas528
    		$1.92 each at 1K+ pcsreel
    of
    250
    LM22676MRX-5.0/NOPB


    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide2500
    DIGI-KEYWorldwide0
    		$1.92 each at 1K+ pcsreel
    of
    2500
    LM22676MRX-ADJ/NOPB


    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    CEACAsia Pacific145000
    DIGI-KEYWorldwide0
    KEIKONGAsia Pacific2500
    		$1.92 each at 1K+ pcsreel
    of
    2500
    LM22676QMR-5.0/NOPB


    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide169
    MOUSERWorldwide190
    		$2.07 each at 1K+ pcsrail
    of
    95
    LM22676QMR-ADJ/NOPB


    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide125
    MOUSERWorldwide190
    		$2.07 each at 1K+ pcsrail
    of
    95
    LM22676QMRE-5.0/NOPB


    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$2.07 each at 1K+ pcsreel
    of
    250
    LM22676QMRE-ADJ/NOPB


    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$2.07 each at 1K+ pcsreel
    of
    250
    LM22676QMRX-5.0/NOPB


    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$2.07 each at 1K+ pcsreel
    of
    2500
    LM22676QMRX-ADJ/NOPB


    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$2.07 each at 1K+ pcsreel
    of
    2500
    LM22676QTJ-5.0/NOPB


    RoHS Status

    TO-263 THIN    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$2.07 each at 1K+ pcsreel
    of
    1000
    LM22676QTJ-ADJ/NOPB


    RoHS Status

    TO-263 THIN    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$2.07 each at 1K+ pcsreel
    of
    1000
    LM22676QTJE-5.0/NOPB


    RoHS Status

    TO-263 THIN    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide444
    MOUSERWorldwide250
    		$2.07 each at 1K+ pcsreel
    of
    250
    LM22676QTJE-ADJ/NOPB


    RoHS Status

    TO-263 THIN    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide445
    MOUSERWorldwide250
    		$2.07 each at 1K+ pcsreel
    of
    250
    LM22676TJ-5.0/NOPB


    RoHS Status

    TO-263 THIN    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.92 each at 1K+ pcsreel
    of
    1000
    LM22676TJ-ADJ/NOPB


    RoHS Status

    TO-263 THIN    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide1000
    CEACAsia Pacific5000
    DIGI-KEYWorldwide0
    KEIKONGAsia Pacific8000
    MOUSERWorldwide477
    		$1.92 each at 1K+ pcsreel
    of
    1000
    LM22676TJE-5.0/NOPB


    RoHS Status

    TO-263 THIN    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide211
    AVNET-EMWorldwide500
    DIGI-KEYWorldwide768
    KEIKONGAsia Pacific2750
    MOUSERWorldwide81
    NEWARKAmericas123
    TAYLORAmericas211
    		$1.92 each at 1K+ pcsreel
    of
    250
    LM22676TJE-ADJ/NOPB


    RoHS Status

    TO-263 THIN    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide250
    AVNET-EMWorldwide2250
    DIGI-KEYWorldwide1093
    FARNELLEurope and Asia255
    MOUSERWorldwide731
    NEWARKAmericas220
    TAYLORAmericas250
    		$1.92 each at 1K+ pcsreel
    of
    250

    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 LM22676.

    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 LM22676 is located at RoHS Status.

    Part Number(s)
    (NSID)    		DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM22670EVAL/NOPB

    		Evaluation Board for LM22670 & LM22676, 3A SIMPLE SWITCHER regulators with Adj Vout, Adj Freq or Freq Synch & Precision EnableFull production
    Lead Free (RoHS)

     
    DistributorRegionQty
    DIGI-KEYWorldwide5
    FARNELLEurope and Asia2
    MOUSERWorldwide1
    NEWARKAmericas2
    		$24.00 each1

    Description:

    The LM22670 evaluation board is designed to demonstrate the capabilities of the LM22670 switching regulator. The LM22670 evaluation board is configured to provide an output voltage of 3.3V up to 3A load current with an input voltage range of 4.5V to 42V. Due to the low RDS(ON) of the integrated N-channel MOSFET and maximum duty -cycle limitations, the minimum input voltage of 4.5V will only provide a 3.3V output voltage for load currents up to 500 mA. For load currents higher than 500 mA, an input voltage of 5.5V or higher is required. The typical operating frequency is 500 kHz. The evaluation board is designed to operate at ambient temperatures up to 50°C.

    At low input voltages between 4.5V and 6V, a minimum load of approximately 5 mA may be required to reach a regulated 3.3V output voltage. To aid in the design and evaluation of DC/DC buck converter solutions based on the LM22670 switching regulator, the evaluation board can be re-configured for different output voltages.

    Contents:

    • LM22670 Assembled Evaluation Board
    • Application Note 1885 for the LM22670 Evaluation Board
    • LM22670 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
    LM22676MR-5.0/NOPB

    		77.907
    		PSOP83260DetailDownloadN/A
    		NSXYTT
    L22676
    5.0
    LM22676MR-ADJ/NOPB

    		77.907
    		PSOP83260DetailDownloadN/A
    		NSXYTT
    L22676
    ADJ
    LM22676MRE-5.0/NOPB

    		77.907
    		PSOP83260DetailDownloadN/A
    		NSXYTT
    L22676
    5.0
    LM22676MRE-ADJ/NOPB

    		77.907
    		PSOP83260DetailDownloadN/A
    		NSXYTT
    L22676
    ADJ
    LM22676MRX-5.0/NOPB

    		77.907
    		PSOP83260DetailDownloadN/A
    		NSXYTT
    L22676
    5.0
    LM22676MRX-ADJ/NOPB

    		77.907
    		PSOP83260DetailDownloadN/A
    		NSXYTT
    L22676
    ADJ
    LM22676QMR-5.0/NOPB

    		PSOP83260DetailDownloadN/A
    		NSXYTT
    L22676
    Q5.0
    LM22676QMR-ADJ/NOPB

    		PSOP83260DetailDownloadN/A
    		NSXYTT
    L22676
    QADJ
    LM22676QMRE-5.0/NOPB

    		PSOP83260DetailDownloadN/A
    		NSXYTT
    L22676
    Q5.0
    LM22676QMRE-ADJ/NOPB

    		PSOP83260DetailDownloadN/A
    		NSXYTT
    L22676
    QADJ
    LM22676QMRX-5.0/NOPB

    		PSOP83260DetailDownloadN/A
    		NSXYTT
    L22676
    Q5.0
    LM22676QMRX-ADJ/NOPB

    		PSOP83260DetailDownloadN/A
    		NSXYTT
    L22676
    QADJ
    LM22676QTJ-5.0/NOPB

    		TO-263 THIN71260DetailDownloadN/A
    		NSUZXYTTE#
    LM22676
    QTJ-5.0
    LM22676QTJ-ADJ/NOPB

    		TO-263 THIN71260DetailDownloadN/A
    		NSUZXYTTE#
    LM22676
    QTJ-ADJ
    LM22676QTJE-5.0/NOPB

    		TO-263 THIN71260DetailDownloadN/A
    		NSUZXYTTE#
    LM22676
    QTJ-5.0
    LM22676QTJE-ADJ/NOPB

    		TO-263 THIN71260DetailDownloadN/A
    		NSUZXYTTE#
    LM22676
    QTJ-ADJ
    LM22676TJ-5.0/NOPB

    		790.208
    		TO-263 THIN71260DetailDownloadN/A
    		NSUZXYTTE#
    LM22676
    TJ-5.0
    LM22676TJ-ADJ/NOPB

    		790.208
    N/A
    		TO-263 THIN71260DetailDownloadN/A
    		NSUZXYTTE#
    LM22676
    TJ-ADJ
    LM22676TJE-5.0/NOPB

    		790.208
    		TO-263 THIN71260DetailDownloadN/A
    		NSUZXYTTE#
    LM22676
    TJ-5.0
    LM22676TJE-ADJ/NOPB

    		790.208
    		TO-263 THIN71260DetailDownloadN/A
    		NSUZXYTTE#
    LM22676
    TJ-ADJ

    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 LM22676.

    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 LM22676 is located at RoHS Status.

    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM22676MR-5.0ABCD5053640016269843461661152
    LM22676MR-ADJABCD5053640016269843461661152
    LM22676MRE-5.0ABCD5053640016269843461661152
    LM22676MRE-ADJABCD5053640016269843461661152
    LM22676MRX-5.0ABCD5053640016269843461661152
    LM22676MRX-ADJABCD5053640016269843461661152
    LM22676QMR-5.0ABCD5053640016269843461661152
    LM22676QMR-ADJABCD5053640016269843461661152
    LM22676QMRE-5.0ABCD5053640016269843461661152
    LM22676QMRE-ADJABCD5053640016269843461661152
    LM22676QMRX-5.0ABCD5053640016269843461661152
    LM22676QMRX-ADJABCD5053640016269843461661152
    LM22676QTJ-5.0ABCD5053640016269843461661152
    LM22676QTJ-ADJABCD5053640016269843461661152
    LM22676QTJE-5.0ABCD5053640016269843461661152
    LM22676QTJE-ADJABCD5053640016269843461661152
    LM22676TJ-5.0ABCD5053640016269843461661152
    LM22676TJ-ADJABCD5053640016269843461661152
    LM22676TJE-5.0ABCD5053640016269843461661152
    LM22676TJE-ADJABCD5053640016269843461661152

    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 LM22676.

    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 LM22676 is located at RoHS Status.

    5th Generation SIMPLE SWITCHER® Regulator Family Technical Overview
    Click image to play video in new window


    5th Generation SIMPLE SWITCHER® Regulator Family Technical Overview
    Date: 2009-03-11
    Length: 0:21:05
    [Information as of 7-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation