National Semiconductor | High-performance Analog

 

 LM2787   

Low Noise Regulated Switched Capacitor Voltage Inverter in micro SMD
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Features
  • Inverts and regulates the input supply voltage
  • Small 8-Bump micro SMD and thin micro SMD packages
  • 91% typical charge pump power efficiency at 10mA
  • Low output ripple
  • Shutdown lowers Quiescent current to 0.05 µA (typical)
  • Description

    The LM2787 CMOS Negative Regulated Switched Capacitor Voltage Inverter delivers a very low noise adjustable output for an input voltage in the range of +2.7V to +5.5V. Four low cost capacitors are used in this circuit to provide up to 10mA of output current. The regulated output for the LM2787 is adjustable between -1.5V and -5.2V. The LM2787 operates at 260 kHz (typical) switching frequency to reduce output resistance and voltage ripple. With an operating current of only 400 µA (charge pump power efficiency greater than 90% with most loads) and 0.05 µA typical shutdown current, the LM2787 provides ideal performance for cellular phone power amplifier bias and other low current, low noise negative voltage needs. The device comes in small 8-Bump micro SMD and thin micro SMD packages.


    Applications

  • Wireless Communication Systems
  • Cellular Phone Power Amplifier Biasing
  • Interface Power Supplies
  • Handheld Instrumentation
  • Laptop Computers and PDA's



  • Typical Application
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    Block Diagram
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    Typical Performance
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    Datasheets
    TitleSizeDateOther
    Language
    LM2787 Low Noise Regulated Switched Capacitor Voltage Inverter in micro SMD233
    Kbytes
    17-Apr-03   


    Application Notes
    TitleSizeDateOther
    Language
    AN-1209: Application Note 1209 LM2787 Evaluation Board33
    Kbytes
    10-May-04 

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM2787BP
    NONE
    NATIONAL SEMICONDUCTOR
    24 Jul 2009
    LM2787BPX
    NONE
    NATIONAL SEMICONDUCTOR
    24 Jul 2009
    LM2787TP
    NONE
    NONE
    30 Nov 2009
    LM2787TPX
    NONE
    NONE
    30 Nov 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 LM2787.

    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 LM2787 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM2787BPEV
    Low Noise Regulated Switched Capacitor Voltage Inverter in micro SMDFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide1
    $81.00 each1

    Description:

    Low Noise Regulated Switched Capacitor Voltage Inverter in micro SMD

    Features:

    • Inverts and regulates the input supply voltage
    • Small 8-Bump micro SMD package
    • 91% typical charge pump power efficiency at 10 mA
    • Low output ripple
    • Shutdown lowers Quiescent current to 0.05 microA (typical)

    Applications:

    • Wireless Communication Systems
    • Cellular Phone Power Amplifier Biasing
    • Interface Power Supplies
    • Handheld Instrumentation
    • Laptop Computers and PDA's



    National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

    Lead Free product status is available through the search tool located here

    Part Number(s)
    (NSID)
    Weight
    (milligrams)
    TypePinsMSL RatingPeak ReflowRoHS
    Status
    CAD SymbolsModelsPackage
    Marking
    Format

    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 LM2787.

    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 LM2787 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM2787BP
    NONE
    NATIONAL SEMICONDUCTOR
    24 Jul 2009
    LM2787BPX
    NONE
    NATIONAL SEMICONDUCTOR
    24 Jul 2009
    LM2787TP
    NONE
    NONE
    30 Nov 2009
    LM2787TPX
    NONE
    NONE
    30 Nov 2009

    [Information as of 9-Feb-2012]