National Semiconductor | High-performance Analog

 

 LP3963   
3A Fast Ultra Low Dropout Linear Regulator 		Click link to Download

Features
  • Ultra low dropout voltage
  • Low ground pin current
  • Load regulation of 0.06%
  • 15µA quiescent current in shutdown mode
  • Guaranteed output current of 3A DC
  • Available in TO-263 and TO-220 packages
  • Output voltage accuracy ± 1.5%
  • Error# flag indicates output status (LP3963)
  • Sense option improves load regulation (LP3966)
  • Minimum output capacitor requirements
  • Overtemperature/overcurrent protection
  • -40°C to +125°C junction temperature range

    • Description

    The LP3963/LP3966 series of fast ultra low-dropout linear regulators operate from a +2.5V to +7.0V input supply. Wide range of preset output voltage options are available. These ultra low dropout linear regulators respond very quickly to step changes in load which makes them suitable for low voltage microprocessor applications. The LP3963/LP3966 are developed on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3963/LP3966 to operate under extremely low dropout conditions.

    Dropout Voltage: Ultra low dropout voltage; typically 80mV at 300mA load current and 800mV at 3A load current.

    Ground Pin Current: Typically 6mA at 3A load current.

    Shutdown Mode: Typically 15µA quiescent current when the shutdown pin is pulled low.

    Error# Flag: Error# flag goes low when the output voltage drops 10% below nominal value (for LP3963).

    SENSE: Sense pin improves regulation at remote loads. (For LP3966)

    Precision Output Voltage: Multiple output voltage options are available ranging from 1.2V to 5.0V and adjustable (LP3966), with a guaranteed accuracy of ±1.5% at room temperature, and ±3.0% over all conditions (varying line, load, and temperature).


    Applications

  • Microprocessor power supplies
  • GTL, GTL+, BTL, and SSTL bus terminators
  • Power supplies for DSPs
  • SCSI terminator
  • Post regulators
  • High efficiency linear regulators
  • Battery chargers
  • Other battery powered applications

    • Also Recommended
    LP38513▲New! National's LP38k Family Of High
    LP38853▲Performance LDOs Power Digital ICs
    LP38859▲See More At LDO.NATIONAL.COM



    Typical Application
    click for larger image


    		Block Diagram
    click for larger image



    Typical Performance
    click for larger image


    Parameters / ValuesLP3963 LP38513 LP38853 LP38859
    Output Current3000 mA 3000 mA 3000 mA 3000 mA
    Output Min2.5, 3.3 Volt 0.8 Volt 1.2, 0.8 Volt
    Input Min Voltage2.5 Volt 2.25 Volt 1.04 Volt 1.55, 1.15 Volt
    Input Max Voltage7 Volt 5.5 Volt 5.5 Volt 5.5 Volt
    Dropout Voltage0.8 Volt 0.425 Volt 0.240 Volt 0.35 Volt
    Adjustable OutputNo No Yes No
    Quiescent Current5 mA 10 mA 10 mA 10 mA
    On/Off PinYes Yes Yes No
    PowerGood / Error FlagYes Yes No No
    RegTypeLDO LDO LDO LDO
    Temperature Min-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
    Output Voltage2.5, 3.3 Volt 1.8 Volt 1.2, 0.8 Volt
    Output Max2.5, 3.3 Volt 1.8 Volt 1.2, 0.8 Volt

    Datasheets
    TitleSizeDateOther
    Language
    LP3963 3A Fast Ultra Low Dropout Linear Regulator773
    Kbytes    		15-Sep-06日本語  

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LP3963ES-2.5/NOPB

    LP3963ES-2.5

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide135
    AVNET-EMWorldwide79
    DIGI-KEYWorldwide218
    NEWARKAmericas80
    RS COMPONENTSWorldwide10
    TAYLORAmericas135
    		$1.55 each at 1K+ pcsrail
    of
    45
    LP3963ES-3.3/NOPB

    LP3963ES-3.3

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide150
    AVNET-EMWorldwide35
    DIGI-KEYWorldwide481
    MOUSERWorldwide225
    NEWARKAmericas185
    RS COMPONENTSWorldwide20
    TAYLORAmericas312
    		$1.55 each at 1K+ pcsrail
    of
    45
    LP3963ESX-2.5/NOPB

    LP3963ESX-2.5

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide500
    DIGI-KEYWorldwide0
    MOUSERWorldwide500
    		$1.55 each at 1K+ pcsreel
    of
    500
    LP3963ESX-3.3/NOPB

    LP3963ESX-3.3

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide2500
    AVNET-EMWorldwide500
    DIGI-KEYWorldwide0
    MOUSERWorldwide500
    RSL MICROAsia Pacific500
    TAYLORAmericas2500
    		$1.55 each at 1K+ pcsreel
    of
    500

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LP3963ES-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3963ES-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3963ESX-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3963ESX-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3963ET-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3963ET-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3963ET-5.0
    		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 LP3963.

    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 LP3963 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LP3963ES-2.5/NOPB

    LP3963ES-2.5
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3963ES
    -2.5
    LP3963ES-3.3/NOPB

    LP3963ES-3.3
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3963ES
    -3.3
    LP3963ESX-2.5/NOPB

    LP3963ESX-2.5
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3963ES
    -2.5
    LP3963ESX-3.3/NOPB

    LP3963ESX-3.3
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3963ES
    -3.3

    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 LP3963.

    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 LP3963 is located at RoHS Status.

    CAD Symbols and Models
    Download LP3963 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LP3963ES-2.5CS065247473430552700011568301341
    LP3963ES-3.3CS065247473430552700011568301341
    LP3963ESX-2.5CS065247473430552700011568301341
    LP3963ESX-3.3CS065247473430552700011568301341

    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 LP3963.

    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 LP3963 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LP3963ES-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3963ES-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3963ESX-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3963ESX-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3963ET-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3963ET-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3963ET-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009

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