National Semiconductor | High-performance Analog

 

 LP3875   
1.5A Fast Ultra Low Dropout Linear Regulator 		Click link to Download

Features
  • Ultra low dropout voltage
  • Low ground pin current
  • Load regulation of 0.06%
  • 10nA quiescent current in shutdown mode
  • Guaranteed output current of 1.5A 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 LP3872/LP3875 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 LP3872/LP3875 are developed on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3872/LP3875 to operate under extremely low dropout conditions.

    Dropout Voltage: Ultra low dropout voltage; typically 38mV at 150mA load current and 380mV at 1.5A load current.

    Ground Pin Current: Typically 6mA at 1.5A 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
    LP3875-ADJ▲Adjustable Output Verion
    LP38852▲New! National's LP38k Family Of High
    LP38855▲Performance LDOs Power Digital ICs
    LP38858▲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 / ValuesLP3875 LP3875-ADJ LP38852 LP38855 LP38858
    Output Current1500 mA 1500 mA 1500 mA 1500 mA 1500 mA
    Output Min1.8, 2.5, 3.3, 5 Volt 1.216 Volt 0.8 Volt 1.2, 0.8 Volt 1.2, 0.8 Volt
    Input Min Voltage2.5 Volt 2.5 Volt 0.93 Volt 1.38, 0.98 Volt 1.38, 0.98 Volt
    Input Max Voltage7 Volt 7 Volt 5.5 Volt 5.5 Volt 5.5 Volt
    Dropout Voltage0.38 Volt 0.38 Volt 0.130 Volt 0.130 Volt 0.18 Volt
    Adjustable OutputNo Yes Yes No No
    Quiescent Current6 mA 6 mA 10 mA 10 mA 10 mA
    On/Off PinYes Yes Yes Yes No
    PowerGood / Error FlagNo No No No No
    RegTypeLDO LDO LDO LDO LDO
    Temperature Min-40 deg C -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 125 deg C
    Output Voltage1.8, 2.5, 3.3, 5 Volt 1.2, 0.8 Volt 1.2, 0.8 Volt
    Output Max1.8, 2.5, 3.3, 5 Volt 6.62 Volt 1.8 Volt 1.2, 0.8 Volt 1.2, 0.8 Volt

    Datasheets
    TitleSizeDateOther
    Language
    LP3875 1.5A Fast Ultra Low Dropout Linear Regulator745
    Kbytes    		18-Sep-06日本語  

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LP3875EMP-1.8/NOPB

    LP3875EMP-1.8

    RoHS Status

    SOT-223    		Full production
    Lead Time: 16 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide2115
    MOUSERWorldwide785
    NEWARKAmericas120
    RS COMPONENTSWorldwide12
    		$1.21 each at 1K+ pcsreel
    of
    1000
    LP3875EMP-2.5/NOPB

    LP3875EMP-2.5

    RoHS Status

    SOT-223    		Full production
    Lead Time: 16 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide1837
    DIGI-KEYWorldwide2232
    RS COMPONENTSWorldwide51
    		$1.21 each at 1K+ pcsreel
    of
    1000
    LP3875EMP-3.3/NOPB

    LP3875EMP-3.3

    RoHS Status

    SOT-223    		Full production
    Lead Time: 12 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide3014
    MOUSERWorldwide735
    NEWARKAmericas371
    		$1.21 each at 1K+ pcsreel
    of
    1000
    LP3875EMP-5.0/NOPB

    LP3875EMP-5.0

    RoHS Status

    SOT-223    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide589
    DIGI-KEYWorldwide2655
    RS COMPONENTSWorldwide900
    		$1.21 each at 1K+ pcsreel
    of
    1000
    LP3875ES-1.8/NOPB

    LP3875ES-1.8

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide205
    AVNET-EMWorldwide125
    DIGI-KEYWorldwide108
    NEWARKAmericas537
    TAYLORAmericas205
    		$1.45 each at 1K+ pcsrail
    of
    45
    LP3875ES-2.5/NOPB

    LP3875ES-2.5

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide317
    DIGI-KEYWorldwide308
    NEWARKAmericas92
    		$1.45 each at 1K+ pcsrail
    of
    45
    LP3875ES-3.3/NOPB

    LP3875ES-3.3

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide230
    AVNET-EMWorldwide277
    DIGI-KEYWorldwide138
    NEWARKAmericas106
    TAYLORAmericas379
    		$1.45 each at 1K+ pcsrail
    of
    45
    LP3875ESX-1.8/NOPB

    LP3875ESX-1.8

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.45 each at 1K+ pcsreel
    of
    500
    LP3875ESX-2.5/NOPB

    LP3875ESX-2.5

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.45 each at 1K+ pcsreel
    of
    500
    LP3875ESX-3.3/NOPB

    LP3875ESX-3.3

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.45 each at 1K+ pcsreel
    of
    500
    LP3875ET-3.3/NOPB

    LP3875ET-3.3

    RoHS Status

    TO-220    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide60
    AVNET-EMWorldwide125
    DIGI-KEYWorldwide188
    RS COMPONENTSWorldwide36
    TAYLORAmericas60
    		$1.45 each at 1K+ pcsrail
    of
    45

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LP3875EMPX-2.5
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3875EMPX-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3875ES-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3875ET-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3875ET-2.5
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3875ET-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3875ET-ADJ
    		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 LP3875.

    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 LP3875 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LP3875EMP-1.8/NOPB

    LP3875EMP-1.8
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LHLB
    LP3875EMP-2.5/NOPB

    LP3875EMP-2.5
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LHNB
    LP3875EMP-3.3/NOPB

    LP3875EMP-3.3
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LHPB
    LP3875EMP-5.0/NOPB

    LP3875EMP-5.0
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LHRB
    LP3875ES-1.8/NOPB

    LP3875ES-1.8
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3875ES
    -1.8
    LP3875ES-2.5/NOPB

    LP3875ES-2.5
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3875ES
    -2.5
    LP3875ES-3.3/NOPB

    LP3875ES-3.3
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3875ES
    -3.3
    LP3875ESX-1.8/NOPB

    LP3875ESX-1.8
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3875ES
    -1.8
    LP3875ESX-2.5/NOPB

    LP3875ESX-2.5
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3875ES
    -2.5
    LP3875ESX-3.3/NOPB

    LP3875ESX-3.3
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3875ES
    -3.3
    LP3875ET-3.3/NOPB

    LP3875ET-3.3
    		1957.896
    1908.876
    		TO-22051
    1    		NA
    NA    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3875ET
    -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 LP3875.

    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 LP3875 is located at RoHS Status.

    CAD Symbols and Models
    Download LP3875 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LP3875EMP-1.8CS065247473430552700011568301341
    LP3875EMP-2.5CS065247473430552700011568301341
    LP3875EMP-3.3CS065247473430552700011568301341
    LP3875EMP-5.0CS065247473430552700011568301341
    LP3875ES-1.8CS065247473430552700011568301341
    LP3875ES-2.5CS065247473430552700011568301341
    LP3875ES-3.3CS065247473430552700011568301341
    LP3875ESX-1.8CS065247473430552700011568301341
    LP3875ESX-2.5CS065247473430552700011568301341
    LP3875ESX-3.3CS065247473430552700011568301341
    LP3875ET-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 LP3875.

    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 LP3875 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LP3875EMPX-2.5
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3875EMPX-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3875ES-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3875ET-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3875ET-2.5
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3875ET-5.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3875ET-ADJ
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009

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