National Semiconductor | High-performance Analog

 

 LP2975   
MOSFET LDO Driver/Controller 		Click link to Download

Features

  • Simple to use, few external components
  • Ultra-small mini SO-8 package
  • 1.5% (A grade) precision output voltage
  • Low-power shutdown input
  • < 1 µA in shutdown
  • Low operating current (180 µA typical @ VIN = 5V)
  • Wide supply voltage range (1.8V to 24V)
  • Built-in current limit amplifier
  • Overtemperature protection
  • 5.0V, and 3.3V standard output voltages
  • Can be programmed using external divider
  • −40°C to +125°C junction temperature range

    • Description

    A high-current LDO regulator is simple to design with the LP2975 LDO Controller. Using an external P-FET, the LP2975 will deliver an ultra low dropout regulator with extremely low quiescent current.

    High open loop gain assures excellent regulation and ripple rejection performance.

    The trimmed internal bandgap reference provides precise output voltage over the entire operating temperature range.

    Dropout voltage is “user selectable” by sizing the external FET: the minimum input-output voltage required for operation is the maximum load current multiplied by the RDS(ON) of the FET.

    Overcurrent protection of the external FET is easily implemented by placing a sense resistor in series with VIN. The 57 mV detection threshold of the current sense circuitry minimizes dropout voltage and power dissipation in the resistor.

    The standard product versions available provide output voltages of 5.0V, or 3.3V with guaranteed 25°C accuracy of 1.5% (“A” grade) and 2.5% (standard grade).


    Applications

  • High-current 5V to 3.3V regulator
  • Post regulator for switching converter
  • Current-limited switch




    • Typical Application
    click for larger image


    		Block Diagram
    click for larger image



    Typical Performance
    click for larger image


     

    ParametersValues
    Output Current Undefined mA
    Input Min Voltage 1.8 Volt
    Input Max Voltage 24 Volt
    Dropout Voltage Undefined Volt
    Adjustable Output No
    Quiescent Current 0.18 mA
    On/Off Pin Yes
    PowerGood / Error Flag No
    RegType LDO, Linear/LDO Controller
    Temperature Min -40 deg C
    Temperature Max 125 deg C
    Special Features LDO Controller
    Output Voltage 3.3, 5 Volt
    Output Max 24 Volt

    Datasheets
    TitleSizeDateOther
    Language
    LP2975 MOSFET LDO Driver/Controller2755
    Kbytes    		23-Jun-11日本語  


    Other Technical Documents
    TitleTypeDate
    A User's Guide to Compensating Low-Dropout RegulatorsApp Note 2007-03-21

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LP2975AIMM-3.3/NOPB

    LP2975AIMM-3.3

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1000
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide0
    MOUSERWorldwide750
    RS COMPONENTSWorldwide943
    TAYLORAmericas1000
    		$0.75 each at 1K+ pcsreel
    of
    1000
    LP2975AIMM-5.0/NOPB

    LP2975AIMM-5.0

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide2000
    DIGI-KEYWorldwide0
    MOUSERWorldwide1000
    NEWARKAmericas750
    		$0.75 each at 1K+ pcsreel
    of
    1000
    LP2975AIMMX-5.0/NOPB

    LP2975AIMMX-5.0

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide3250
    		$0.75 each at 1K+ pcsreel
    of
    3500
    LP2975IMM-3.3/NOPB

    LP2975IMM-3.3

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.67 each at 1K+ pcsreel
    of
    1000
    LP2975IMM-5.0/NOPB

    LP2975IMM-5.0

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 8 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide0
    MOUSERWorldwide273
    		$0.67 each at 1K+ pcsreel
    of
    1000
    LP2975IMMX-5.0/NOPB

    LP2975IMMX-5.0

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.67 each at 1K+ pcsreel
    of
    3500

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LP2975AI5.0 MDA
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LP2975AI5.0 MWA
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LP2975AIMM-12
    		NONE
    		NATIONAL SEMICONDUCTOR
    		26 Feb 2007
    LP2975AIMMX-12
    		NONE
    		NATIONAL SEMICONDUCTOR
    		26 Feb 2007
    LP2975AIMMX-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP2975IMM-12
    		NONE
    		NATIONAL SEMICONDUCTOR
    		26 Feb 2007
    LP2975IMMX-12
    		NONE
    		NATIONAL SEMICONDUCTOR
    		26 Feb 2007
    LP2975IMMX-3.3
    		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 LP2975.

    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 LP2975 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LP2975AIMM-3.3/NOPB

    LP2975AIMM-3.3
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailN/AN/A
    		ZXTT
    L45A
    LP2975AIMM-5.0/NOPB

    LP2975AIMM-5.0
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailN/AN/A
    		ZXTT
    L46A
    LP2975AIMMX-5.0/NOPB

    LP2975AIMMX-5.0
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailN/AN/A
    		ZXTT
    L46A
    LP2975IMM-3.3/NOPB

    LP2975IMM-3.3
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailN/AN/A
    		ZXTT
    L45B
    LP2975IMM-5.0/NOPB

    LP2975IMM-5.0
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailN/AN/A
    		ZXTT
    L46B
    LP2975IMMX-5.0/NOPB

    LP2975IMMX-5.0
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailN/AN/A
    		ZXTT
    L46B

    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 LP2975.

    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 LP2975 is located at RoHS Status.

    CAD Symbols and Models
    N/A
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LP2975AIMM-3.3LB2500203650019250002546224006
    LP2975AIMM-5.0LB2500203650019250002546224006
    LP2975AIMMX-5.0LB2500203650019250002546224006
    LP2975IMM-3.3LB2500203650019250002546224006
    LP2975IMM-5.0LB2500203650019250002546224006
    LP2975IMMX-5.0LB2500203650019250002546224006

    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 LP2975.

    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 LP2975 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LP2975AI5.0 MDA
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LP2975AI5.0 MWA
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LP2975AIMM-12
    		NONE
    		NATIONAL SEMICONDUCTOR
    		26 Feb 2007
    LP2975AIMMX-12
    		NONE
    		NATIONAL SEMICONDUCTOR
    		26 Feb 2007
    LP2975AIMMX-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LP2975IMM-12
    		NONE
    		NATIONAL SEMICONDUCTOR
    		26 Feb 2007
    LP2975IMMX-12
    		NONE
    		NATIONAL SEMICONDUCTOR
    		26 Feb 2007
    LP2975IMMX-3.3
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009

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