National Semiconductor | High-performance Analog

 

 LP3981   
Micropower, 300mA Ultra Low-Dropout CMOS Voltage Regulator 		Click link to Download

Features
  • Small, space saving MSOP-8
  • Low Thermal Resistance in LLP-6 package gives excellent power capability
  • Logic controlled enable
  • Stable with ceramic and high quality tantalum capacitors
  • Fast turn-on
  • Thermal shutdown and short-circuit current limit

    • Description

    The LP3981's performance is optimized for battery powered systems to deliver ultra low noise, extremely low dropout voltage and low quiescent current. Regulator ground current increases only slightly in dropout, further prolonging the battery life.

    Power supply rejection is better than 60 dB at low frequencies. This high power supply rejection is maintained down to lower input voltage levels common to battery operated circuits.

    The device is ideal for mobile phone and similar battery powered wireless applications. It provides up to 300 mA, from a 2.5V to 6V input, consuming less than 1µA in disable mode.

    The LP3981 is available in MSOP-8 package. For LP3981 in LLP-6 package, contact NSC sales offices. Performance is specified for -40°C to +125°C temperature range. The device available in the following output voltages; 2.5V, 2.7V, 2.8V, 2.83V, 3.0V, 3.03V and 3.3V as standard. Other output options can be made available, please contact your local NSC sales office.

    Key Specification

  • 2.5 to 6.0V input range
  • 300mA guaranteed output
  • 60dB PSRR at 1kHz
  • <=1µA quiescent current when shut down
  • Fast Turn-On time: 120 µs (typ.) with CBYPASS = 0.01uF
  • 132mV typ dropout with 300mA load
  • 35µVrms output noise over 10Hz to 100kHz
  • -40 to +125°C junction temperature range for operation
  • 2.5V, 2.7V, 2.8V, 2.83V, 3.0V, 3.03V, and 3.3V outputs standard


    • Applications

  • CDMA cellular handsets
  • Wideband CDMA cellular handsets
  • GSM cellular handsets
  • Portable information appliances
  • Tiny 3.3V ± 5% to 2.5V, 300mA converter

    • Also Recommended
    LP3991▲Enable Pin For Shutdown, Low Quiescent Current & Works Well With Ceramic Capacitors



    Typical Application
    click for larger image


    		Block Diagram
    click for larger image



    Typical Performance
    click for larger image


    Parameters / ValuesLP3981 LP3991
    Output Current300 mA 300 mA
    Output Min2.83, 3.03, 2.7, 2.5, 3.3, 2.8 Volt 1.3, 1.2, 2.8, 1.5 Volt
    Input Min Voltage2.7 Volt 1.65 Volt
    Input Max Voltage6 Volt 3.6 Volt
    Dropout Voltage0.132 Volt 0.075 Volt
    Adjustable OutputNo No
    Quiescent Current0.07 mA 0.05 mA
    On/Off PinYes Yes
    PowerGood / Error FlagNo No
    RegTypeLDO LDO
    Temperature Min-40 deg C -40 deg C
    Temperature Max125 deg C 125 deg C
    Output Voltage2.83, 3.03, 2.7, 2.5, 3.3, 2.8 Volt 1.3, 1.2, 2.8, 1.5 Volt
    Output Max2.83, 3.03, 2.7, 2.5, 3.3, 2.8 Volt 1.3, 1.2, 2.8, 1.5 Volt

    Datasheets
    TitleSizeDateOther
    Language
    LP3981 Micropower, 300mA Ultra Low-Dropout CMOS Voltage Regulator718
    Kbytes    		26-Apr-05日本語  

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LP3981ILD-2.5/NOPB

    LP3981ILD-2.5

    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide1000
    AVNET-EMWorldwide899
    DIGI-KEYWorldwide4854
    TAYLORAmericas1000
    		$0.31 each at 1K+ pcsreel
    of
    1000
    LP3981ILD-2.8/NOPB


    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.31 each at 1K+ pcsreel
    of
    1000
    LP3981ILD-3.0/NOPB

    LP3981ILD-3.0

    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.31 each at 1K+ pcsreel
    of
    1000
    LP3981ILD-3.3/NOPB

    LP3981ILD-3.3

    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide2827
    DIGI-KEYWorldwide4408
    MOUSERWorldwide1875
    NEWARKAmericas1369
    TAYLORAmericas2827
    TECHMOSAAsia Pacific43000
    		$0.31 each at 1K+ pcsreel
    of
    1000
    LP3981ILDX-2.5/NOPB

    LP3981ILDX-2.5

    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.31 each at 1K+ pcsreel
    of
    4500
    LP3981ILDX-2.7/NOPB

    LP3981ILDX-2.7

    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.31 each at 1K+ pcsreel
    of
    4500
    LP3981ILDX-2.8/NOPB

    LP3981ILDX-2.8

    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.31 each at 1K+ pcsreel
    of
    4500
    LP3981ILDX-2.83/NOPB


    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.31 each at 1K+ pcsreel
    of
    4500
    LP3981ILDX-3.03/NOPB


    RoHS Status

    LLP    		Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    TECHMOSAAsia Pacific30150
    		$0.31 each at 1K+ pcsreel
    of
    4500
    LP3981IMM-2.5/NOPB

    LP3981IMM-2.5

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 8 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide2000
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide2525
    MOUSERWorldwide1769
    NEWARKAmericas539
    TAYLORAmericas2000
    		$0.27 each at 1K+ pcsreel
    of
    1000
    LP3981IMM-2.7/NOPB

    LP3981IMM-2.7

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide1975
    		$0.27 each at 1K+ pcsreel
    of
    1000
    LP3981IMM-2.8/NOPB

    LP3981IMM-2.8

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.27 each at 1K+ pcsreel
    of
    1000
    LP3981IMM-3.0/NOPB

    LP3981IMM-3.0

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide4708
    MOUSERWorldwide1749
    NEWARKAmericas253
    		$0.27 each at 1K+ pcsreel
    of
    1000
    LP3981IMM-3.03/NOPB

    LP3981IMM-3.03

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 8 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide2000
    DIGI-KEYWorldwide0
    MOUSERWorldwide2000
    RS COMPONENTSWorldwide370
    TAYLORAmericas2000
    TECHMOSAAsia Pacific2000
    		$0.27 each at 1K+ pcsreel
    of
    1000
    LP3981IMM-3.3/NOPB

    LP3981IMM-3.3

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide3000
    AVNET-EMWorldwide1151
    DIGI-KEYWorldwide3548
    MOUSERWorldwide1735
    NEWARKAmericas1749
    TAYLORAmericas8020
    TECHMOSAAsia Pacific2000
    		$0.27 each at 1K+ pcsreel
    of
    1000
    LP3981IMMX-2.5/NOPB

    LP3981IMMX-2.5

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide7000
    DIGI-KEYWorldwide0
    		$0.27 each at 1K+ pcsreel
    of
    3500
    LP3981IMMX-3.3/NOPB

    LP3981IMMX-3.3

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide7000
    DIGI-KEYWorldwide0
    		$0.27 each at 1K+ pcsreel
    of
    3500

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LP3981ILD-2.83
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3981ILDX-3.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3981ILDX-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3981IMM-2.83
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LP3981IMMX-2.83
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LP3981IMMX-3.03
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LP3981IYD-2.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		06 Dec 2005
    LP3981IYDX-2.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		06 Dec 2005
    LP3981YD-2.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LP3981YD-3.0
    		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 LP3981.

    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 LP3981 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LP3981ILD-2.5/NOPB

    LP3981ILD-2.5
    		28.014
    28.102
    		LLP63
    1    		260
    235    		DetailDownloadN/A
    		ZXYTT
    LO1UB
    LP3981ILD-2.8/NOPB

    		28.014
    		LLP63260DetailDownloadN/A
    		ZXYTT
    L01ZB
    LP3981ILD-3.0/NOPB

    LP3981ILD-3.0
    		28.014
    28.102
    		LLP63
    1    		260
    235    		DetailDownloadN/A
    		ZXYTT
    L017B
    LP3981ILD-3.3/NOPB

    LP3981ILD-3.3
    		28.014
    28.102
    		LLP63
    1    		260
    235    		DetailDownloadN/A
    		ZXYTT
    LO1XB
    LP3981ILDX-2.5/NOPB

    LP3981ILDX-2.5
    		28.014
    28.102
    		LLP63
    1    		260
    235    		DetailDownloadN/A
    		ZXYTT
    LO1UB
    LP3981ILDX-2.7/NOPB

    LP3981ILDX-2.7
    		28.014
    28.102
    		LLP63
    1    		260
    235    		DetailDownloadN/A
    		ZXYTT
    LO1VB
    LP3981ILDX-2.8/NOPB

    LP3981ILDX-2.8
    		28.014
    28.102
    		LLP63
    1    		260
    235    		DetailDownloadN/A
    		ZXYTT
    L01ZB
    LP3981ILDX-2.83/NOPB

    		28.014
    		LLP63260DetailDownloadN/A
    		ZXYTT
    LO1SB
    LP3981ILDX-3.03/NOPB

    		28.014
    		LLP63260DetailDownloadN/A
    		ZXYTT
    LO1YB
    LP3981IMM-2.5/NOPB

    LP3981IMM-2.5
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    LFKB
    LP3981IMM-2.7/NOPB

    LP3981IMM-2.7
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    LFLB
    LP3981IMM-2.8/NOPB

    LP3981IMM-2.8
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    LFTB
    LP3981IMM-3.0/NOPB

    LP3981IMM-3.0
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    LF3B
    LP3981IMM-3.03/NOPB

    LP3981IMM-3.03
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    LFPB
    LP3981IMM-3.3/NOPB

    LP3981IMM-3.3
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    LFNB
    LP3981IMMX-2.5/NOPB

    LP3981IMMX-2.5
    		29.851
    		MINI SOIC81
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    LFKB
    LP3981IMMX-3.3/NOPB

    LP3981IMMX-3.3
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    LFNB

    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 LP3981.

    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 LP3981 is located at RoHS Status.

    CAD Symbols and Models
    Download LP3981 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LP3981ILD-2.5CMOS70213010015840003449464325
    LP3981ILD-2.8CMOS70213010015840003449464325
    LP3981ILD-3.0CMOS70213010015840003449464325
    LP3981ILD-3.3CMOS70213010015840003449464325
    LP3981ILDX-2.5CMOS70213010015840003449464325
    LP3981ILDX-2.7CMOS70213010015840003449464325
    LP3981ILDX-2.8CMOS70213010015840003449464325
    LP3981ILDX-2.83CMOS70213010015840003449464325
    LP3981ILDX-3.03CMOS70213010015840003449464325
    LP3981IMM-2.5CMOS70213010015840003449464325
    LP3981IMM-2.7CMOS70213010015840003449464325
    LP3981IMM-2.8CMOS70213010015840003449464325
    LP3981IMM-3.0CMOS70213010015840003449464325
    LP3981IMM-3.03CMOS70213010015840003449464325
    LP3981IMM-3.3CMOS70213010015840003449464325
    LP3981IMMX-2.5CMOS70213010015840003449464325
    LP3981IMMX-3.3CMOS70213010015840003449464325

    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 LP3981.

    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 LP3981 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LP3981ILD-2.83
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3981ILDX-3.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3981ILDX-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP3981IMM-2.83
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LP3981IMMX-2.83
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LP3981IMMX-3.03
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LP3981IYD-2.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		06 Dec 2005
    LP3981IYDX-2.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		06 Dec 2005
    LP3981YD-2.8
    		NONE
    		NATIONAL SEMICONDUCTOR
    		16 Nov 2008
    LP3981YD-3.0
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009

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