National Semiconductor | High-performance Analog

 

 LP3961   
800mA Fast Ultra Low Dropout Linear Regulator 		Click link to Download

Features
  • Ultra low dropout voltage
  • Low ground pin current
  • Load regulation of 0.02%
  • 15µA quiescent current in shutdown mode
  • Guaranteed output current of 0.8A DC
  • Available in SOT-223,TO-263 and TO-220 packages
  • Output voltage accuracy ± 1.5%
  • Error# flag indicates output status (LP3961)
  • Sense option improves better load regulation (LP3964)
  • Extremely low output capacitor requirements
  • Overtemperature/overcurrent protection
  • -40°C to +125°C junction temperature range

    • Description

    The LP3961/LP3964 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 fast to step changes in load which makes them suitable for low voltage microprocessor applications. The LP3961/LP3964 are developed on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3961/LP3964 to operate under extremely low dropout conditions.

    Dropout Voltage: Ultra low dropout voltage; typically 24mV at 80mA load current and 240mV at 800mA load current.

    Ground Pin Current: Typically 4mA at 800mA 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 LP3961).

    SENSE: Sense pin improves regulation at remote loads. (For LP3964)

    Precision Output Voltage: Multiple output voltage options are available ranging from 1.2V to 5.0V and adjustable (LP3964), 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
    LP38851▲New! National's LP38k Family Of High
    LP38852▲Performance LDOs Power Digital ICs
    LP38853▲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 / ValuesLP3961 LP38851 LP38852 LP38853
    Output Current800 mA 800 mA 1500 mA 3000 mA
    Output Min1.8, 2.5, 3.3, 5 Volt 0.80 Volt 0.8 Volt 0.8 Volt
    Input Min Voltage2.5 Volt 0.915 Volt 0.93 Volt 1.04 Volt
    Input Max Voltage7 Volt 5.5 Volt 5.5 Volt 5.5 Volt
    Dropout Voltage0.24 Volt 0.115 Volt 0.130 Volt 0.240 Volt
    Adjustable OutputNo Yes Yes Yes
    On/Off PinYes Yes Yes Yes
    PowerGood / Error FlagYes No 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 Voltage1.8, 2.5, 3.3, 5 Volt
    Output Max1.8, 2.5, 3.3, 5 Volt 1.80 Volt 1.8 Volt 1.8 Volt

    Datasheets
    TitleSizeDateOther
    Language
    LP3961 800mA Fast Ultra Low Dropout Linear Regulator914
    Kbytes    		20-Sep-06日本語  

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LP3961EMP-1.8/NOPB

    LP3961EMP-1.8

    RoHS Status

    SOT-223    		Full production
    Lead Time: 16 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide2000
    DIGI-KEYWorldwide2245
    MOUSERWorldwide994
    NEWARKAmericas183
    RS COMPONENTSWorldwide706
    TAYLORAmericas2000
    		$1.07 each at 1K+ pcsreel
    of
    1000
    LP3961EMP-2.5/NOPB

    LP3961EMP-2.5

    RoHS Status

    SOT-223    		Full production
    Lead Time: 12 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1000
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide2127
    MOUSERWorldwide1000
    NEWARKAmericas369
    RS COMPONENTSWorldwide733
    TAYLORAmericas1000
    		$1.07 each at 1K+ pcsreel
    of
    1000
    LP3961EMP-3.3/NOPB

    LP3961EMP-3.3

    RoHS Status

    SOT-223    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide710
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide3646
    MOUSERWorldwide994
    NEWARKAmericas610
    TAYLORAmericas710
    		$1.07 each at 1K+ pcsreel
    of
    1000
    LP3961EMP-5.0/NOPB

    LP3961EMP-5.0

    RoHS Status

    SOT-223    		Full production
    Lead Time: 12 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1000
    DIGI-KEYWorldwide0
    MOUSERWorldwide170
    NEWARKAmericas84
    TAYLORAmericas1000
    		$1.07 each at 1K+ pcsreel
    of
    1000
    LP3961EMPX-1.8/NOPB

    LP3961EMPX-1.8

    RoHS Status

    SOT-223    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.07 each at 1K+ pcsreel
    of
    2000
    LP3961EMPX-2.5/NOPB

    LP3961EMPX-2.5

    RoHS Status

    SOT-223    		Full production
    Lead Time: 12 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.07 each at 1K+ pcsreel
    of
    2000
    LP3961EMPX-3.3/NOPB

    LP3961EMPX-3.3

    RoHS Status

    SOT-223    		Full production
    Lead Time: 16 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.07 each at 1K+ pcsreel
    of
    2000
    LP3961ES-1.8/NOPB

    LP3961ES-1.8

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide270
    AVNET-EMWorldwide161
    DIGI-KEYWorldwide274
    NEWARKAmericas56
    TAYLORAmericas270
    		$1.09 each at 1K+ pcsrail
    of
    45
    LP3961ES-2.5/NOPB

    LP3961ES-2.5

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide473
    AVNET-EMWorldwide192
    DIGI-KEYWorldwide581
    NEWARKAmericas252
    TAYLORAmericas473
    		$1.09 each at 1K+ pcsrail
    of
    45
    LP3961ES-3.3/NOPB

    LP3961ES-3.3

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide315
    AVNET-EMWorldwide329
    DIGI-KEYWorldwide147
    MOUSERWorldwide315
    RS COMPONENTSWorldwide35
    TAYLORAmericas315
    		$1.09 each at 1K+ pcsrail
    of
    45
    LP3961ESX-2.5/NOPB

    LP3961ESX-2.5

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.09 each at 1K+ pcsreel
    of
    500
    LP3961ESX-3.3/NOPB

    LP3961ESX-3.3

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.09 each at 1K+ pcsreel
    of
    500

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LP3961EMPX-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3961ES-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3961ESX-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3961ESX-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3961ET-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3961ET-2.5
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3961ET-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3961ET-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 LP3961.

    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 LP3961 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LP3961EMP-1.8/NOPB

    LP3961EMP-1.8
    		119.548
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LBAB
    LP3961EMP-2.5/NOPB

    LP3961EMP-2.5
    		119.548
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LBBB
    LP3961EMP-3.3/NOPB

    LP3961EMP-3.3
    		119.548
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LAZB
    LP3961EMP-5.0/NOPB

    LP3961EMP-5.0
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LBSB
    LP3961EMPX-1.8/NOPB

    LP3961EMPX-1.8
    		119.55
    120
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LBAB
    LP3961EMPX-2.5/NOPB

    LP3961EMPX-2.5
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LBBB
    LP3961EMPX-3.3/NOPB

    LP3961EMPX-3.3
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LAZB
    LP3961ES-1.8/NOPB

    LP3961ES-1.8
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3961ES
    -1.8
    LP3961ES-2.5/NOPB

    LP3961ES-2.5
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3961ES
    -2.5
    LP3961ES-3.3/NOPB

    LP3961ES-3.3
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3961ES
    -3.3
    LP3961ESX-2.5/NOPB

    LP3961ESX-2.5
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3961ES
    -2.5
    LP3961ESX-3.3/NOPB

    LP3961ESX-3.3
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3961ES
    -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 LP3961.

    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 LP3961 is located at RoHS Status.

    CAD Symbols and Models
    Download LP3961 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LP3961EMP-1.8CS065247473430552700011568301341
    LP3961EMP-2.5CS065247473430552700011568301341
    LP3961EMP-3.3CS065247473430552700011568301341
    LP3961EMP-5.0CS065247473430552700011568301341
    LP3961EMPX-1.8CS065247473430552700011568301341
    LP3961EMPX-2.5CS065247473430552700011568301341
    LP3961EMPX-3.3CS065247473430552700011568301341
    LP3961ES-1.8CS065247473430552700011568301341
    LP3961ES-2.5CS065247473430552700011568301341
    LP3961ES-3.3CS065247473430552700011568301341
    LP3961ESX-2.5CS065247473430552700011568301341
    LP3961ESX-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 LP3961.

    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 LP3961 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LP3961EMPX-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3961ES-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3961ESX-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3961ESX-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3961ET-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3961ET-2.5
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3961ET-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3961ET-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009

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