National Semiconductor | High-performance Analog

 

 LMV431A   
Low-Voltage (1.24V) Adjustable Precision Shunt Regulators 		Click link to Download

Features
  • Low Voltage Operation/Wide Adjust Range (1.24V/30V)
  • 0.5% Initial Tolerance (LMV431B)
  • Temperature Compensated for Industrial Temperature Range (39 PPM/°C for the LMV431AI)
  • Low Operation Current (55µA)
  • Low Output Impedance (0.25)
  • Fast Turn-On Response
  • Low Cost

    • Description

    The LMV431, LMV431A and LMV431B are precision 1.24V shunt regulators capable of adjustment to 30V. Negative feedback from the cathode to the adjust pin controls the cathode voltage, much like a non-inverting op amp configuration (Refer to Symbol and Functional diagrams). A two resistor voltage divider terminated at the adjust pin controls the gain of a 1.24V band-gap reference. Shorting the cathode to the adjust pin (voltage follower) provides a cathode voltage of a 1.24V.

    The LMV431, LMV431A and LMV431B have respective initial tolerances of 1.5%, 1% and 0.5%, and functionally lends themselves to several applications that require zener diode type performance at low voltages. Applications include a 3V to 2.7V low drop-out regulator, an error amplifier in a 3V off-line switching regulator and even as a voltage detector. These parts are typically stable with capacitive loads greater than 10nF and less than 50pF.

    The LMV431, LMV431A and LMV431B provide performance at a competitive price.


    Applications

  • Shunt Regulator
  • Series Regulator
  • Current Source or Sink
  • Voltage Monitor
  • Error Amplifier
  • 3V Off-Line Switching Regulator
  • Low Dropout N-Channel Series Regulator




    • Typical Application
    click for larger image


    		Connection Diagram
    click for larger image



    Typical Performance
    click for larger image


     

    ParametersValues
    Initial Accuracy (+/-) Max 1 %
    Reference Voltage 1.2 V
    Tempco, max (ppm/C) 129, 138 ppm
    Operating Current 0.055 mA
    Output Current Undefined mA
    Reference with respect to Anode (low side)
    Temperature Min -40 deg C
    Temperature Max 85 deg C
    PowerWise Undefined

    Datasheets
    TitleSizeDateOther
    Language
    LMV431A Low-Voltage (1.24V) Adjustable Precision Shunt Regulators943
    Kbytes    		27-May-05日本語  

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMV431ACM5/NOPB

    LMV431ACM5

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide994
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide4312
    FARNELLEurope and Asia4906
    MOUSERWorldwide739
    NEWARKAmericas1489
    TAYLORAmericas8294
    		$0.20 each at 1K+ pcsreel
    of
    1000
    LMV431ACM5X/NOPB

    LMV431ACM5X

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AITGAsia Pacific140
    ARROWWorldwide3000
    DIGI-KEYWorldwide0
    MOUSERWorldwide2994
    TAYLORAmericas3000
    		$0.20 each at 1K+ pcsreel
    of
    3000
    LMV431AIM5/NOPB

    LMV431AIM5

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1000
    AVNET-EMWorldwide688
    DIGI-KEYWorldwide3768
    FARNELLEurope and Asia455
    MOUSERWorldwide2000
    NEWARKAmericas1683
    TAYLORAmericas11772
    TECHMOSAAsia Pacific30000
    		$0.20 each at 1K+ pcsreel
    of
    1000
    LMV431AIM5X/NOPB

    LMV431AIM5X

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide220000
    AVNET-EMWorldwide3000
    DIGI-KEYWorldwide0
    MOUSERWorldwide2597
    TAYLORAmericas220000
    		$0.20 each at 1K+ pcsreel
    of
    3000
    LMV431AIMF/NOPB

    LMV431AIMF

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide4350
    AVNET-EMWorldwide12000
    DIGI-KEYWorldwide0
    FARNELLEurope and Asia16295
    MOUSERWorldwide763
    NEWARKAmericas3026
    TAYLORAmericas8438
    		$0.22 each at 1K+ pcsreel
    of
    1000
    LMV431AIMFX/NOPB

    LMV431AIMFX

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide3000
    DIGI-KEYWorldwide0
    MOUSERWorldwide2480
    RSL MICROAsia Pacific12000
    TAYLORAmericas26419
    		$0.22 each at 1K+ pcsreel
    of
    3000
    LMV431AIZ/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide4766
    DIGI-KEYWorldwide3140
    FARNELLEurope and Asia416
    MOUSERWorldwide3546
    NEWARKAmericas416
    TECHMOSAAsia Pacific3600
    		$0.20 each at 1K+ pcsbox
    of
    1800

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LMV431ACZ
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009

    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 LMV431A.

    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 LMV431A is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LMV431ACM5/NOPB

    LMV431ACM5
    		14.696
    14.801
    		SOT-2351
    1    		260
    260    		DetailDownloadN/A
    		N09A
    XTT
    LMV431ACM5X/NOPB

    LMV431ACM5X
    		14.696
    14.801
    		SOT-2351
    1    		260
    260    		DetailDownloadN/A
    		N09A
    XTT
    LMV431AIM5/NOPB

    LMV431AIM5
    		14.696
    14.801
    		SOT-2351
    1    		260
    260    		DetailDownloadN/A
    		N08A
    XTT
    LMV431AIM5X/NOPB

    LMV431AIM5X
    		14.696
    14.801
    		SOT-2351
    1    		260
    260    		DetailDownloadN/A
    		N08A
    XTT
    LMV431AIMF/NOPB

    LMV431AIMF
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		RLA
    XTT
    LMV431AIMFX/NOPB

    LMV431AIMFX
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		RLA
    XTT
    LMV431AIZ/NOPB

    		201.662
    202.003
    		TO-9231NADetailDownloadN/A
    		NSXYTT
    LMV431
    AIZ

    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 LMV431A.

    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 LMV431A is located at RoHS Status.

    Design Tools
    TitleSizeDate
    LMV431A Qualification Package792 Kbytes24-Jun-1999

    CAD Symbols and Models
    Download LMV431A CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LMV431ACM5LB30003437100416450011181688246
    LMV431ACM5XLB30003437100416450011181688246
    LMV431AIM5LB30003437100416450011181688246
    LMV431AIM5XLB30003437100416450011181688246
    LMV431AIMFLB30003437100416450011181688246
    LMV431AIMFXLB30003437100416450011181688246
    LMV431AIZLB30003437100416450011181688246

    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 LMV431A.

    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 LMV431A is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LMV431ACZ
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009

    LM25085/5085 Implementing Accurate Current Limit Demo
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    Requirements and Solutions for Automotive Power Management Applications
    Click image to play video in new window


    LM25085/5085 Implementing Accurate Current Limit Demo
    Date: 2011-07-29
    Length: 00:03:24
    Requirements and Solutions for Automotive Power Management Applications
    Date: 2008-02-17
    Length: 00:40:00
    [Information as of 9-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation