National Semiconductor | High-performance Analog

 

 LP3855   
1.5A Fast Response Ultra Low Dropout Linear Regulators 		Click link to Download

Features

  • Ultra low dropout voltage
  • Stable with selected ceramic capacitors
  • 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
  • Overtemperature/overcurrent protection
  • −40°C to +125°C junction temperature range

    • Description

    The LP3852/LP3855 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 LP3852/LP3855 are developed on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3852/LP3855 to operate under extremely low dropout conditions.

    Dropout Voltage: Ultra low dropout voltage; typically 24mV at 150mA load current and 240mV at 1.5A load current.

    Ground Pin Current: Typically 4mA 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
    LP3855-ADJ▲Adjustable Output Version
    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 / ValuesLP3855 LP3855-ADJ LP38852 LP38855 LP38858
    Output Current1500 mA 1500 mA 1500 mA 1500 mA 1500 mA
    Output Min1.8, 2.5, 3.3, 5 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 7.0 Volt 5.5 Volt 5.5 Volt 5.5 Volt
    Dropout Voltage0.24 Volt 0.435 Volt 0.130 Volt 0.130 Volt 0.18 Volt
    Adjustable OutputNo Yes Yes No No
    Quiescent Current3 mA 10 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 1.8 Volt 1.2, 0.8 Volt 1.2, 0.8 Volt

    Datasheets
    TitleSizeDateOther
    Language
    LP3855 1.5A Fast Response Ultra Low Dropout Linear Regulators408
    Kbytes    		9-Mar-11日本語  

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LP3855EMP-1.8/NOPB

    LP3855EMP-1.8

    RoHS Status

    SOT-223    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide1815
    MOUSERWorldwide991
    RS COMPONENTSWorldwide30
    		$1.83 each at 1K+ pcsreel
    of
    1000
    LP3855EMP-2.5/NOPB

    LP3855EMP-2.5

    RoHS Status

    SOT-223    		Full production
    Lead Time: 16 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide750
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide6955
    MOUSERWorldwide970
    NEWARKAmericas981
    RS COMPONENTSWorldwide602
    TAYLORAmericas750
    		$1.83 each at 1K+ pcsreel
    of
    1000
    LP3855EMP-3.3/NOPB

    LP3855EMP-3.3

    RoHS Status

    SOT-223    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide874
    DIGI-KEYWorldwide2088
    NEWARKAmericas718
    RS COMPONENTSWorldwide25
    RSL MICROAsia Pacific1000
    		$1.83 each at 1K+ pcsreel
    of
    1000
    LP3855EMP-5.0/NOPB

    LP3855EMP-5.0

    RoHS Status

    SOT-223    		Full production
    Lead Time: 16 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide1000
    CEACAsia Pacific2000
    DIGI-KEYWorldwide2438
    MOUSERWorldwide1000
    RS COMPONENTSWorldwide861
    TAYLORAmericas1000
    		$1.83 each at 1K+ pcsreel
    of
    1000
    LP3855EMPX-1.8/NOPB

    LP3855EMPX-1.8

    RoHS Status

    SOT-223    		Full production
    Lead Time: 16 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.83 each at 1K+ pcsreel
    of
    2000
    LP3855EMPX-2.5/NOPB

    LP3855EMPX-2.5

    RoHS Status

    SOT-223    		Full production
    Lead Time: 16 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.83 each at 1K+ pcsreel
    of
    2000
    LP3855EMPX-3.3/NOPB

    LP3855EMPX-3.3

    RoHS Status

    SOT-223    		Full production
    Lead Time: 16 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.83 each at 1K+ pcsreel
    of
    2000
    LP3855EMPX-5.0/NOPB

    LP3855EMPX-5.0

    RoHS Status

    SOT-223    		Full production
    Lead Time: 16 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.83 each at 1K+ pcsreel
    of
    2000
    LP3855ES-1.8/NOPB

    LP3855ES-1.8

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide206
    DIGI-KEYWorldwide30
    RS COMPONENTSWorldwide24
    		$1.95 each at 1K+ pcsrail
    of
    45
    LP3855ES-2.5/NOPB

    LP3855ES-2.5

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide50
    DIGI-KEYWorldwide238
    MOUSERWorldwide180
    		$1.95 each at 1K+ pcsrail
    of
    45
    LP3855ES-3.3/NOPB

    LP3855ES-3.3

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide169
    DIGI-KEYWorldwide670
    MOUSERWorldwide570
    RS COMPONENTSWorldwide27
    		$1.95 each at 1K+ pcsrail
    of
    45
    LP3855ES-5.0/NOPB

    LP3855ES-5.0

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide60
    DIGI-KEYWorldwide726
    MOUSERWorldwide135
    		$1.95 each at 1K+ pcsrail
    of
    45
    LP3855ESX-1.8/NOPB

    LP3855ESX-1.8

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.95 each at 1K+ pcsreel
    of
    500
    LP3855ESX-2.5/NOPB

    LP3855ESX-2.5

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.95 each at 1K+ pcsreel
    of
    500
    LP3855ESX-3.3/NOPB

    LP3855ESX-3.3

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide500
    DIGI-KEYWorldwide0
    MOUSERWorldwide500
    		$1.95 each at 1K+ pcsreel
    of
    500
    LP3855ESX-5.0/NOPB

    LP3855ESX-5.0

    RoHS Status

    TO-263    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide500
    DIGI-KEYWorldwide0
    		$1.95 each at 1K+ pcsreel
    of
    500
    LP3855ET-1.8/NOPB

    LP3855ET-1.8

    RoHS Status

    TO-220    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide34
    MOUSERWorldwide180
    RS COMPONENTSWorldwide12
    		$1.95 each at 1K+ pcsrail
    of
    45
    LP3855ET-2.5/NOPB

    LP3855ET-2.5

    RoHS Status

    TO-220    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide340
    MOUSERWorldwide180
    RS COMPONENTSWorldwide7
    		$1.95 each at 1K+ pcsrail
    of
    45
    LP3855ET-3.3/NOPB

    LP3855ET-3.3

    RoHS Status

    TO-220    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide123
    MOUSERWorldwide145
    RS COMPONENTSWorldwide2
    		$1.95 each at 1K+ pcsrail
    of
    45
    LP3855ET-5.0/NOPB

    LP3855ET-5.0

    RoHS Status

    TO-220    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide259
    DIGI-KEYWorldwide82
    RS COMPONENTSWorldwide42
    		$1.95 each at 1K+ pcsrail
    of
    45

    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 LP3855.

    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 LP3855 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LP3855EMP-1.8/NOPB

    LP3855EMP-1.8
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LHYB
    LP3855EMP-2.5/NOPB

    LP3855EMP-2.5
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LHZB
    LP3855EMP-3.3/NOPB

    LP3855EMP-3.3
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LJ1B
    LP3855EMP-5.0/NOPB

    LP3855EMP-5.0
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LJ2B
    LP3855EMPX-1.8/NOPB

    LP3855EMPX-1.8
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LHYB
    LP3855EMPX-2.5/NOPB

    LP3855EMPX-2.5
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LHZB
    LP3855EMPX-3.3/NOPB

    LP3855EMPX-3.3
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LJ1B
    LP3855EMPX-5.0/NOPB

    LP3855EMPX-5.0
    		119.55
    120.002
    		SOT-22351
    1    		260
    260    		DetailDownloadN/A
    		XYTT
    LJ2B
    LP3855ES-1.8/NOPB

    LP3855ES-1.8
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3855ES
    -1.8
    LP3855ES-2.5/NOPB

    LP3855ES-2.5
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3855ES
    -2.5
    LP3855ES-3.3/NOPB

    LP3855ES-3.3
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3855ES
    -3.3
    LP3855ES-5.0/NOPB

    LP3855ES-5.0
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3855ES
    -5.0
    LP3855ESX-1.8/NOPB

    LP3855ESX-1.8
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3855ES
    -1.8
    LP3855ESX-2.5/NOPB

    LP3855ESX-2.5
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3855ES
    -2.5
    LP3855ESX-3.3/NOPB

    LP3855ESX-3.3
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3855ES
    -3.3
    LP3855ESX-5.0/NOPB

    LP3855ESX-5.0
    		1448.647
    1449.868
    		TO-26353
    3    		245
    235    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3855ES
    -5.0
    LP3855ET-1.8/NOPB

    LP3855ET-1.8
    		1957.896
    1908.876
    		TO-22051
    1    		NA
    NA    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3855ET
    -1.8
    LP3855ET-2.5/NOPB

    LP3855ET-2.5
    		1957.896
    1908.876
    		TO-22051
    1    		NA
    NA    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3855ET
    -2.5
    LP3855ET-3.3/NOPB

    LP3855ET-3.3
    		1957.896
    1908.876
    		TO-22051
    1    		NA
    NA    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3855ET
    -3.3
    LP3855ET-5.0/NOPB

    LP3855ET-5.0
    		1957.896
    1908.876
    		TO-22051
    1    		NA
    NA    		DetailDownloadN/A
    		NSUZXYTTE#
    LP3855ET
    -5.0

    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 LP3855.

    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 LP3855 is located at RoHS Status.

    CAD Symbols and Models
    Download LP3855 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LP3855EMP-1.8CS065247473430552700011568301341
    LP3855EMP-2.5CS065247473430552700011568301341
    LP3855EMP-3.3CS065247473430552700011568301341
    LP3855EMP-5.0CS065247473430552700011568301341
    LP3855EMPX-1.8CS065247473430552700011568301341
    LP3855EMPX-2.5CS065247473430552700011568301341
    LP3855EMPX-3.3CS065247473430552700011568301341
    LP3855EMPX-5.0CS065247473430552700011568301341
    LP3855ES-1.8CS065247473430552700011568301341
    LP3855ES-2.5CS065247473430552700011568301341
    LP3855ES-3.3CS065247473430552700011568301341
    LP3855ES-5.0CS065247473430552700011568301341
    LP3855ESX-1.8CS065247473430552700011568301341
    LP3855ESX-2.5CS065247473430552700011568301341
    LP3855ESX-3.3CS065247473430552700011568301341
    LP3855ESX-5.0CS065247473430552700011568301341
    LP3855ET-1.8CS065247473430552700011568301341
    LP3855ET-2.5CS065247473430552700011568301341
    LP3855ET-3.3CS065247473430552700011568301341
    LP3855ET-5.0CS065247473430552700011568301341

    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 LP3855.

    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 LP3855 is located at RoHS Status.

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