National Semiconductor | High-performance Analog

 

 LP3892   
1.5A Fast-Response Ultra Low Dropout Linear Regulators 		Click link to Download

Features
  • Ultra low dropout voltage (140 mV @ 1.5A typ)
  • Low ground pin current
  • Load regulation of 0.04%/A
  • 60 nA typical quiescent current in shutdown
  • 1.5% output accuracy (25°C)
  • TO-220, TO-263 and PSOP-8 packages
  • Over temperature/over current protection
  • -40°C to +125°C junction temperature range

    • Description

    The LP3892 is a high current, fast response regulator which can maintain output voltage regulation with minimum input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: Vbias provides voltage to drive the gate of the N-MOS power transistor, while Vin is the input voltage which supplies power to the load. The use of an external bias rail allows the part to operate from ultra low Vin voltages. Unlike bipolar regulators, the CMOS architectutre consumes extremely low quiescent current at any output load current. The use of an N-MOS power transistor results in wide bandwidth, yet minimum external capacitance is required to maintain loop stability.

    The fast transient response of these devices makes them suitable for use in powering DSP, Microcontroller Core voltages and Switch Mode Power Supply post regulators. The parts are available in TO-220, TO-263 and PSOP-8 packages.

    Dropout Voltage:140mV (typ) @ 1.5A load current.

    Ground Pin Current: 3 mA (typ) at full load.

    Shutdown Current: 60 nA (typ) when S/D pin is low.

    Precision Output Voltage: 1.5% room temperature accuracy.


    Applications

  • DSP Power Supplies
  • Server Core and I/O Supplies
  • PC Add-in-Cards
  • Local Regulators in Set-Top Boxes
  • Microcontroller Power Supplies
  • High Efficiency Power Supplies
  • SMPS Post-Regulators

    • Also Recommended
    LP3882▲Has Half The Dropout Voltage
    LP38842▲Vout Down To 0.56V, Vin Down To 1.12V
    LP3893▲3A Version



    Typical Application
    click for larger image


    		Block Diagram
    click for larger image



    Typical Performance
    *click for larger image


    Parameters / ValuesLP3892 LP3882 LP38842 LP3893
    Output Current1500 mA 1500 mA 1500 mA 3000 mA
    Output Min1.8, 1.2, 1.5 Volt 1.2 Volt 1.2, 0.8, 1.5 Volt 1.2 Volt
    Input Min Voltage1.94, 1.34, 1.64 Volt 1.91, 1.31, 1.61, 1.326 Volt 1.315, 0.915, 1.615 Volt 1.47 Volt
    Input Max Voltage5.5 Volt 5.5 Volt 5.5 Volt 5.5 Volt
    Dropout Voltage0.14 Volt 0.11 Volt 0.115 Volt 0.27 Volt
    Adjustable OutputNo No No No
    Quiescent Current4 mA 4 mA 32 mA 4 mA
    On/Off PinYes Yes Yes Yes
    PowerGood / Error FlagNo 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, 1.2, 1.5 Volt 1.8, 1.2, 1.5 Volt 1.2, 0.8, 1.5 Volt 1.2 Volt
    Output Max1.8, 1.2, 1.5 Volt 1.8, 1.2, 1.5 Volt 1.2, 0.8, 1.5 Volt 1.2 Volt

    Datasheets
    TitleSizeDateOther
    Language
    LP3892 1.5A Fast-Response Ultra Low Dropout Linear Regulators745
    Kbytes    		21-Jun-06   

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LP3892EMR-1.2/NOPB

    LP3892EMR-1.2

    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide23
    DIGI-KEYWorldwide294
    RS COMPONENTSWorldwide50
    		$1.40 each at 1K+ pcsrail
    of
    95
    LP3892EMR-1.5/NOPB

    LP3892EMR-1.5

    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide182
    DIGI-KEYWorldwide265
    RS COMPONENTSWorldwide95
    		$1.40 each at 1K+ pcsrail
    of
    95
    LP3892EMR-1.8/NOPB

    LP3892EMR-1.8

    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide285
    RS COMPONENTSWorldwide90
    		$1.40 each at 1K+ pcsrail
    of
    95
    LP3892EMRX-1.2/NOPB

    LP3892EMRX-1.2

    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.40 each at 1K+ pcsreel
    of
    2500
    LP3892EMRX-1.5/NOPB

    LP3892EMRX-1.5

    RoHS Status

    PSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.40 each at 1K+ pcsreel
    of
    2500
    LP3892ES-1.2/NOPB

    LP3892ES-1.2

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide161
    AVNET-EMWorldwide295
    DIGI-KEYWorldwide1294
    MOUSERWorldwide30
    NEWARKAmericas20
    RS COMPONENTSWorldwide5
    TAYLORAmericas161
    		$1.48 each at 1K+ pcsrail
    of
    45
    LP3892ES-1.5/NOPB

    LP3892ES-1.5

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide26
    AVNET-EMWorldwide275
    DIGI-KEYWorldwide403
    MOUSERWorldwide215
    RS COMPONENTSWorldwide30
    TAYLORAmericas26
    		$1.48 each at 1K+ pcsrail
    of
    45
    LP3892ESX-1.2/NOPB

    LP3892ESX-1.2

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AITGAsia Pacific1000
    ARROWWorldwide500
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide0
    MOUSERWorldwide470
    TAYLORAmericas500
    		$1.48 each at 1K+ pcsreel
    of
    500
    LP3892ESX-1.5/NOPB

    LP3892ESX-1.5

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide500
    		$1.48 each at 1K+ pcsreel
    of
    500

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LP3892ES-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3892ESX-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3892ET-1.2
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3892ET-1.5
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3892ET-1.8
    		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 LP3892.

    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 LP3892 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LP3892EMR-1.2/NOPB

    LP3892EMR-1.2
    		72.782
    73.003
    		PSOP83
    3    		260
    260    		DetailDownloadN/A
    		NSXYTT
    3892E
    MR1.2
    LP3892EMR-1.5/NOPB

    LP3892EMR-1.5
    		72.782
    73.003
    		PSOP83
    3    		260
    260    		DetailDownloadN/A
    		NSXYTT
    3892E
    MR1.5
    LP3892EMR-1.8/NOPB

    LP3892EMR-1.8
    		72.782
    73.003
    		PSOP83
    3    		260
    260    		DetailDownloadN/A
    		NSXYTT
    3892E
    MR1.8
    LP3892EMRX-1.2/NOPB

    LP3892EMRX-1.2
    		72.782
    73.003
    		PSOP83
    3    		260
    260    		DetailDownloadN/A
    		NSXYTT
    3892E
    MR1.2
    LP3892EMRX-1.5/NOPB

    LP3892EMRX-1.5
    		72.782
    73.003
    		PSOP83
    3    		260
    260    		DetailDownloadN/A
    		NSXYTT
    3892E
    MR1.5
    LP3892ES-1.2/NOPB

    LP3892ES-1.2
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3892ES
    -1.2
    LP3892ES-1.5/NOPB

    LP3892ES-1.5
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3892ES
    -1.5
    LP3892ESX-1.2/NOPB

    LP3892ESX-1.2
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3892ES
    -1.2
    LP3892ESX-1.5/NOPB

    LP3892ESX-1.5
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3892ES
    -1.5

    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 LP3892.

    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 LP3892 is located at RoHS Status.

    CAD Symbols and Models
    Download LP3892 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LP3892EMR-1.2CS065247473430552700011568301341
    LP3892EMR-1.5CS065247473430552700011568301341
    LP3892EMR-1.8CS065247473430552700011568301341
    LP3892EMRX-1.2CS065247473430552700011568301341
    LP3892EMRX-1.5CS065247473430552700011568301341
    LP3892ES-1.2CS065247473430552700011568301341
    LP3892ES-1.5CS065247473430552700011568301341
    LP3892ESX-1.2CS065247473430552700011568301341
    LP3892ESX-1.5CS065247473430552700011568301341

    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 LP3892.

    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 LP3892 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LP3892ES-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3892ESX-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3892ET-1.2
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3892ET-1.5
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3892ET-1.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009

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