National Semiconductor | High-performance Analog

 

 LMZ14202EXT   

2A SIMPLE SWITCHER® Power Module with 42V Maximum Input Voltage for Military and Rugged Applications
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Features

Electrical Specifications

  • 12W maximum total output power
  • Up to 2A output current
  • Input voltage range 6V to 42V
  • Output voltage range 0.8V to 6V
  • Efficiency up to 90%
  • Key Features

  • – 55°C to 125°C junction temperature range
  • Integrated shielded inductor
  • Simple PCB layout
  • Flexible startup sequencing using external soft-start and precision enable
  • Protection against inrush currents and faults such as input UVLO and output short circuit
  • Single exposed pad and standard pinout for easy mounting and manufacturing
  • Fast transient response for powering FPGAs and ASICs
  • Low output voltage ripple
  • Pin-to-pin compatible family:

  • LMZ14203EXT/2EXT/1EXT (42V max 3A, 2A, 1A)

  • LMZ14203/2/1 (42V max 3A, 2A, 1A)

  • LMZ12003/2/1 (20V max 3A, 2A, 1A)
  • Fully enabled for Webench® Power Designer
  • Performance Benefits

  • Low radiated emissions / High radiated immunity
  • Passes vibration standard MIL-STD-883 Method 2007.2 Condition A JESD22–B103B Condition 1
  • Passes drop standard MIL-STD-883 Method 2002.3 Condition B JESD22–B110 Condition B
  • Description

    The LMZ14202EXT SIMPLE SWITCHER® power module is an easy-to-use step-down DC-DC solution capable of driving up to 2A load with exceptional power conversion efficiency, line and load regulation, and output accuracy. The LMZ14202EXT is available in an innovative package that enhances thermal performance and allows for hand or machine soldering.

    The LMZ14202EXT can accept an input voltage rail between 6V and 42V and deliver an adjustable and highly accurate output voltage as low as 0.8V. The LMZ14202EXT only requires three external resistors and four external capacitors to complete the power solution. The LMZ14202EXT is a reliable and robust design with the following protection features: thermal shutdown, input under-voltage lockout, output over-voltage protection, short-circuit protection, output current limit, and allows startup into a pre-biased output. A single resistor adjusts the switching frequency up to 1 MHz.


    Applications

  • Point of load conversions from 12V and 24V input rail
  • Time critical projects
  • Space constrained / high thermal requirement applications
  • Negative output voltage applications (See AN-2027)
  • WEBENCH® LMZ14202EXT
        Min   Max   Range  
      VIN V    6.00 – 42.00V  
      VOUT V    0.80 – 6.00V  
      IOUT A    ≤ 2.00A  
      Ambient Temp °C    ≤ 100°C  
    Footprint BOM Cost Efficiency
    What are WEBENCH® tools?


     

    ParametersValues
    Output Current 2000 mA
    Input Min Voltage 6 Volt
    Input Max Voltage 42 Volt
    Output Min 0.8 Volt
    Output Max 6 Volt
    Frequency Min 100 kHz
    Frequency Max 1000 kHz
    Efficiency (peak) 94 %
    Integrated Inductor Yes
    PowerGood / Error Flag No
    SoftStart Yes
    Sync Pin No
    Inverting Yes
    Flyback No
    RegType Power Module
    Temperature Min -55 deg C
    Temperature Max 125 deg C
    Adjustable Output Yes
    Adj Switch Frequency Yes
    PWM Mode Constant On-time
    Topology Buck
    Special Features Wide temp, Low EMI
    Step-Down Yes
    Multiple Output Capability No
    Output Power 12 Watt
    Output Range 0.8V to 6.0V
    Switching Frequency 400 kHz
    Feedback Voltage 0.8 Volt
    On/Off Pin Yes
    Regulator Family SIMPLE SWITCHER
    Automotive No
    PowerWise Yes
    Synchronous Rectification Yes
    Quiescent Current 1 mA

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMZ14202EXTTZ/NOPB


    RoHS Status


    TO-PMOD
    Full production
    Lead Time: 10 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $14.30 each at 100+ pcsreel
    of
    250
    LMZ14202EXTTZE/NOPB


    RoHS Status


    TO-PMOD
    Full production
    Lead Time: 10 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide45
    DIGI-KEYWorldwide0
    MOUSERWorldwide90
    $14.30 each at 100+ pcsrail
    of
    45
    LMZ14202EXTTZX/NOPB


    RoHS Status


    TO-PMOD
    Full production
    Lead Time: 10 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $14.30 each at 100+ pcsreel
    of
    500

    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 LMZ14202EXT.

    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 LMZ14202EXT is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMZ14202EXTEVAL/NOPB

    Simple Switcher ® Power Module 42Vin, 2A Extended Temp Eval BoardFull production
    Lead Free (RoHS)

     
    DistributorRegionQty
    AVNET-EMWorldwide7
    DIGI-KEYWorldwide8
    MOUSERWorldwide3
    $45.00 each1

    The SIMPLE SWITCHER power module evaluation board is optimized for peak performance and increased flexibility. By incorporating additional ceramic and an aluminum filter capacitor, the power module EVAL board demonstrates the low output ripple, fast transient response, and low conducted and radiated EMI performance of the device. Adjusting the output voltage, optimizing the control loop circuitry, and fine-tuning the filter capacitance is ease, with convenient size and placement of the passive components on the board. Finally, the excellent thermal performance of the power modules is enhanced using a 4-layer 1oz copper PCB.

    Features

    • Integrated shielded inductor (inside module)
    • VIN = 6V to 42V
    • Precision enable UVLO - 8V
    • 3.3V output (output voltage is adjustable by changing 1 or 2 resistors)
    • Operates at full load up to 80°C ambient at 12V input
    • Efficiency
      • Up to 92% (LMZ14203/LMZ12003)
    • Thermal performance
      • θJA = 20°C/W
      • θJC = 1.9°C/W
    • Uses 0805 passives on front side for easy modification of values to match requirements
    • 1.705 in. x 3.03 in. (5.8 cm x 5.8 cm) 4-layer 1oz copper PCB

    Contents

    • LMZ14202EXT 2A SIMPLE SWITCHER® Power Module with 42V Maximum Input Voltage Evaluation Board
    • Application Note 2084 for the LMZ1420xEXT/LMZ1200xEXT Evaluation Boards

    Other Resources




    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
    LMZ14202EXTTZ/NOPB

    1556.015
    TO-PMOD73245DetailN/AN/A
    NSUZXYTTE#
    LMZ14202
    EXT
    LMZ14202EXTTZE/NOPB

    1556.015
    TO-PMOD73245DetailN/AN/A
    NSUZXYTTE#
    LMZ14202
    EXT
    LMZ14202EXTTZX/NOPB

    1556.015
    TO-PMOD73245DetailN/AN/A
    NSUZXYTTE#
    LMZ14202
    EXT

    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 LMZ14202EXT.

    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 LMZ14202EXT is located at RoHS Status.

    Design Tools
    TitleSizeDate
    Thermal Resistance Estimate (xls)  

    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)
    LMZ14202EXTTZABCD15004268000639400011814314958
    LMZ14202EXTTZEABCD15004268000639400011814314958
    LMZ14202EXTTZXABCD15004268000639400011814314958

    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 LMZ14202EXT.

    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 LMZ14202EXT is located at RoHS Status.

    SIMPLE SWITCHER® EXT Power Module Drop & Vibration Test
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    SIMPLE SWITCHER® EXT Power Module Drop & Vibration Test
    Date: 2010-07-30
    Length: 0:05:11
    [Information as of 9-Feb-2012]