National Semiconductor | High-performance Analog

 

 LP2953   
Adjustable Micropower Low-Dropout Voltage Regulator 		Click link to Download

Features
  • Output voltage adjusts from 1.23V to 29V
  • Guaranteed 250 mA output current
  • Extremely low quiescent current
  • Low dropout voltage
  • Extremely tight line and load regulation
  • Very low temperature coefficient
  • Current and thermal limiting
  • Reverse battery protection
  • 50 mA (typical) output pulldown crowbar
  • 5V and 3.3V versions available

    • Description

    The LP2952 and LP2953 are micropower voltage regulators with very low quiescent current (130 µA typical at 1 mA load) and very low dropout voltage (typ. 60 mV at light load and 470 mV at 250 mA load current). They are ideally suited for battery-powered systems. Furthermore, the quiescent current increases only slightly at dropout, which prolongs battery life.

    The LP2952 and LP2953 retain all the desirable characteristics of the LP2951, but offer increased output current, additional features, and an improved shutdown function.

    The internal crowbar pulls the output down quickly when the shutdown is activated.

    The error flag goes low if the output voltage drops out of regulation.

    Reverse battery protection is provided.

    The internal voltage reference is made available for external use, providing a low-T.C. reference with very good line and load regulation.

    The parts are available in DIP and surface mount packages.


    Applications

  • Auxiliary comparator included with CMOS/TTL compatible output levels. Can be used for fault detection, low input line detection, etc.
  • High-efficiency linear regulator
  • Regulator with under-voltage shutdown
  • Low dropout battery-powered regulator
  • Snap-ON/Snap-OFF regulator

    • Also Recommended
    LP2956▲Adds Second Regulator Output.



    Typical Application
    click for larger image


    		Block Diagram
    click for larger image



    Typical Performance
    click for larger image


    Parameters / ValuesLP2953 LP2956
    Output Current250 mA
    Output Min1.23 Volt
    Input Min Voltage-20 Volt
    Input Max Voltage30 Volt
    Dropout Voltage0.47 Volt
    Adjustable OutputYes
    Quiescent Current0.13 mA
    On/Off PinYes
    PowerGood / Error FlagYes
    RegTypeLDO
    Temperature Min-40 deg C
    Temperature Max125 deg C
    Output Max29 Volt
    AutomotiveYes

    Datasheets
    TitleSizeDateOther
    Language
    LP2953 Adjustable Micropower Low-Dropout Voltage Regulator1050
    Kbytes    		11-Mar-05日本語  


    Application Notes
    TitleSizeDateOther
    Language
    AN-1061: Application Note 1061 Power Conversion in Line-Powered Equipment162
    Kbytes    		1-Oct-02日本語


    Other Technical Documents
    TitleTypeDate
    Linear and Switching Voltage Regulator Fundamental Part 1App Note 2007-03-21

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LP2953AIM/NOPB


    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide156
    AVNET-EMWorldwide322
    DIGI-KEYWorldwide227
    FARNELLEurope and Asia89
    NEWARKAmericas87
    TAYLORAmericas156
    		$1.92 each at 1K+ pcsrail
    of
    48
    LP2953AIMX/NOPB

    LP2953AIMX

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.92 each at 1K+ pcsreel
    of
    2500
    LP2953IM/NOPB

    LP2953IM

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide48
    AVNET-EMWorldwide86
    DIGI-KEYWorldwide228
    NEWARKAmericas16
    TAYLORAmericas48
    		$1.06 each at 1K+ pcsrail
    of
    48
    LP2953IMX/NOPB

    LP2953IMX

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.06 each at 1K+ pcsreel
    of
    2500
    LP2953IN/NOPB

    LP2953IN

    RoHS Status

    MDIP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide100
    AVNET-EMWorldwide336
    DIGI-KEYWorldwide0
    FARNELLEurope and Asia8
    MOUSERWorldwide265
    NEWARKAmericas18
    RS COMPONENTSWorldwide28
    TAYLORAmericas100
    		$1.13 each at 1K+ pcsrail
    of
    20

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LP2953AI MWC
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LP2953AIM-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LP2953AIMX-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LP2953AMJ/883
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LP2953IM-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008

    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 LP2953.

    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 LP2953 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LP2953AIM/NOPB

    		139.49
    140
    		SOIC NARROW161260DetailDownloadN/A
    		NSUZXYTTE#
    LP2953AIM
    LP2953AIMX/NOPB

    LP2953AIMX
    		139.49
    140
    		SOIC NARROW161
    1    		260
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP2953AIM
    LP2953IM/NOPB

    LP2953IM
    		139.49
    140
    		SOIC NARROW161
    1    		260
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP2953IM
    LP2953IMX/NOPB

    LP2953IMX
    		139.49
    140
    		SOIC NARROW161
    1    		260
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP2953IM
    LP2953IN/NOPB

    LP2953IN
    		1219.322
    1223.032
    		MDIP161
    1    		NA
    NA    		DetailDownloadN/A
    		NSUZXYYTTE#
    LP2953IN

    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 LP2953.

    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 LP2953 is located at RoHS Status.

    CAD Symbols and Models
    Download LP2953 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LP2953AIMSLM04404600353250011002356520
    LP2953AIMXSLM04404600353250011002356520
    LP2953IMSLM04404600353250011002356520
    LP2953IMXSLM04404600353250011002356520
    LP2953INSLM04404600353250011002356520

    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 LP2953.

    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 LP2953 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LP2953AI MWC
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LP2953AIM-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LP2953AIMX-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LP2953AMJ/883
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LP2953IM-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008

    [Information as of 9-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation