National Semiconductor | High-performance Analog

 

 LP3871   
0.8A Fast Ultra Low Dropout Linear Regulators 		Click link to Download

Features
  • Ultra low dropout voltage
  • Low ground pin current
  • Load regulation of 0.04%
  • 10nA quiescent current in shutdown mode
  • Guaranteed output current of 0.8A DC
  • Available in TO-263, TO-220 and SOT-223 packages
  • Output voltage accuracy ± 1.5%
  • Error# flag indicates output status
  • Sense option improves load regulation
  • Minimum output capacitor requirements
  • Overtemperature/overcurrent protection
  • -40°C to +125°C junction temperature range

    • Description

    The LP3871/LP3874 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 LP3871/LP3874 are developed on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3871/LP3874 to operate under extremely low dropout conditions.

    Dropout Voltage: Ultra low dropout voltage; typically 24mV at 80mA load current and 240mV at 0.8A load current.

    Ground Pin Current: Typically 6mA at 0.8A load current.

    Shutdown Mode: Typically 10nA quiescent current when the shutdown pin is pulled low.

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

    SENSE: Sense pin improves regulation at remote loads.

    Precision Output Voltage: Multiple output voltage options are available ranging from 1.8V to 5.0V 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 / ValuesLP3871 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
    Quiescent Current5 mA 10 mA 10 mA 10 mA
    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
    LP3871 0.8A Fast Ultra Low Dropout Linear Regulators746
    Kbytes    		18-Sep-06日本語  

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LP3871EMP-1.8/NOPB

    LP3871EMP-1.8

    RoHS Status

    SOT-223    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide3118
    MOUSERWorldwide982
    NEWARKAmericas311
    RS COMPONENTSWorldwide820
    		$1.01 each at 1K+ pcsreel
    of
    1000
    LP3871EMP-2.5/NOPB

    LP3871EMP-2.5

    RoHS Status

    SOT-223    		Full production
    Lead Time: 12 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide1026
    MOUSERWorldwide950
    TAYLORAmericas988
    		$1.01 each at 1K+ pcsreel
    of
    1000
    LP3871EMP-3.3/NOPB

    LP3871EMP-3.3

    RoHS Status

    SOT-223    		Full production
    Lead Time: 16 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1000
    AVNET-EMWorldwide2695
    DIGI-KEYWorldwide2906
    NEWARKAmericas77
    RS COMPONENTSWorldwide130
    TAYLORAmericas1000
    		$1.01 each at 1K+ pcsreel
    of
    1000
    LP3871EMP-5.0/NOPB


    RoHS Status

    SOT-223    		Full production
    Lead Time: 12 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1826
    AVNET-EMWorldwide708
    DIGI-KEYWorldwide0
    RS COMPONENTSWorldwide10
    TAYLORAmericas1826
    		$1.01 each at 1K+ pcsreel
    of
    1000
    LP3871EMPX-2.5/NOPB

    LP3871EMPX-2.5

    RoHS Status

    SOT-223    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.01 each at 1K+ pcsreel
    of
    2000
    LP3871EMPX-3.3/NOPB

    LP3871EMPX-3.3

    RoHS Status

    SOT-223    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.01 each at 1K+ pcsreel
    of
    2000
    LP3871ES-1.8/NOPB

    LP3871ES-1.8

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide170
    DIGI-KEYWorldwide212
    RS COMPONENTSWorldwide20
    		$1.01 each at 1K+ pcsrail
    of
    45
    LP3871ES-2.5/NOPB

    LP3871ES-2.5

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide167
    DIGI-KEYWorldwide349
    RS COMPONENTSWorldwide15
    		$1.01 each at 1K+ pcsrail
    of
    45
    LP3871ES-3.3/NOPB

    LP3871ES-3.3

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide70
    AVNET-EMWorldwide165
    DIGI-KEYWorldwide325
    RS COMPONENTSWorldwide25
    TAYLORAmericas70
    		$1.01 each at 1K+ pcsrail
    of
    45
    LP3871ESX-1.8/NOPB

    LP3871ESX-1.8

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.01 each at 1K+ pcsreel
    of
    500
    LP3871ESX-2.5/NOPB

    LP3871ESX-2.5

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.01 each at 1K+ pcsreel
    of
    500
    LP3871ESX-3.3/NOPB

    LP3871ESX-3.3

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.01 each at 1K+ pcsreel
    of
    500

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LP3871EMPX-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3871ES-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3871ET-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3871ET-2.5
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3871ET-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3871ET-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 LP3871.

    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 LP3871 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LP3871EMP-1.8/NOPB

    LP3871EMP-1.8
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LH6B
    LP3871EMP-2.5/NOPB

    LP3871EMP-2.5
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LH7B
    LP3871EMP-3.3/NOPB

    LP3871EMP-3.3
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LH8B
    LP3871EMP-5.0/NOPB

    		119.55
    		SOT-22351260DetailDownloadN/A
    		XYTT
    LH9B
    LP3871EMPX-2.5/NOPB

    LP3871EMPX-2.5
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LH7B
    LP3871EMPX-3.3/NOPB

    LP3871EMPX-3.3
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LH8B
    LP3871ES-1.8/NOPB

    LP3871ES-1.8
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3871ES
    -1.8
    LP3871ES-2.5/NOPB

    LP3871ES-2.5
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3871ES
    -2.5
    LP3871ES-3.3/NOPB

    LP3871ES-3.3
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3871ES
    -3.3
    LP3871ESX-1.8/NOPB

    LP3871ESX-1.8
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3871ES
    -1.8
    LP3871ESX-2.5/NOPB

    LP3871ESX-2.5
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3871ES
    -2.5
    LP3871ESX-3.3/NOPB

    LP3871ESX-3.3
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3871ES
    -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 LP3871.

    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 LP3871 is located at RoHS Status.

    CAD Symbols and Models
    Download LP3871 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LP3871EMP-1.8CS065247473430552700011568301341
    LP3871EMP-2.5CS065247473430552700011568301341
    LP3871EMP-3.3CS065247473430552700011568301341
    LP3871EMP-5.0CS065247473430552700011568301341
    LP3871EMPX-2.5CS065247473430552700011568301341
    LP3871EMPX-3.3CS065247473430552700011568301341
    LP3871ES-1.8CS065247473430552700011568301341
    LP3871ES-2.5CS065247473430552700011568301341
    LP3871ES-3.3CS065247473430552700011568301341
    LP3871ESX-1.8CS065247473430552700011568301341
    LP3871ESX-2.5CS065247473430552700011568301341
    LP3871ESX-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 LP3871.

    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 LP3871 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LP3871EMPX-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3871ES-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3871ET-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3871ET-2.5
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3871ET-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3871ET-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009

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