National Semiconductor | High-performance Analog

 

 LMZ14203   

3A SIMPLE SWITCHER® Power Module with 42V Maximum Input Voltage
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Features

Electrical Specifications

  • 18W maximum total output power
  • Up to 3A output current
  • Input voltage range 6V to 42V
  • Output voltage range 0.8V to 6V
  • Efficiency up to 90%
  • Key Features

  • 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
  • – 40°C to 125°C junction temperature range
  • 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:

  • LMZ14203/2/1 (42V max 3A, 2A, 1A)

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

  • Operates at high ambient temperature with no thermal derating
  • High efficiency reduces system heat generation
  • Low radiated emissions (EMI) complies with EN55022 class B standard
  • Passes 10V/m radiated immunity EMI test standard EN61000 4-3
  • Description

    The LMZ14203 SIMPLE SWITCHER power module is an easy-to-use step-down DC-DC solution capable of driving up to 3A load with exceptional power conversion efficiency, line and load regulation, and output accuracy. The LMZ14203 is available in an innovative package that enhances thermal performance and allows for hand or machine soldering.

    The LMZ14203 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 LMZ14203 only requires three external resistors and four external capacitors to complete the power solution. The LMZ14203 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® LMZ14203
        Min   Max   Range  
      VIN V    6.00 – 42.00V  
      VOUT V    0.80 – 6.00V  
      IOUT A    ≤ 3.00A  
      Ambient Temp °C    ≤ 100°C  
    Footprint BOM Cost Efficiency
    What are WEBENCH® tools?


    Also Recommended
    LMZ105045.5V Input Voltage Max, 4A Output Current
    LMZ1200120V, 1A Input Voltage Max, Pin-to-Pin Compatible
    LMZ1200220V, 2A Input Voltage Max, Pin-to-Pin Compatible
    LMZ1200320V Input Voltage Max Version, Pin-to-Pin Compatible
    LMZ142011A Version, Pin-to-Pin Compatible
    LMZ142022A Version, Pin-to-Pin Compatible


    Simplified Application Schematic Front Page

    Parameters / ValuesLMZ14203 LMZ10504 LMZ12001 LMZ12002 LMZ12003 LMZ14201 LMZ14202
    Output Current3000 mA 4000 mA 1000 mA 2000 mA 3000 mA 1000 mA 2000 mA
    Input Min Voltage6 Volt 2.95 Volt 4.5 Volt 4.5 Volt 4.5 Volt 6 Volt 6 Volt
    Input Max Voltage42 Volt 5.5 Volt 20 Volt 20 Volt 20 Volt 42 Volt 42 Volt
    Output Min0.8 Volt 0.8 Volt 0.8 Volt 0.8 Volt 0.8 Volt 0.8 Volt 0.8 Volt
    Output Max6 Volt 5 Volt 6 Volt 6 Volt 6 Volt 6 Volt 6 Volt
    Frequency MinUndefined kHz Undefined kHz Undefined kHz
    Frequency Max900 kHz Undefined kHz 1000 kHz 1000 kHz 1000 kHz 1000 kHz 1000 kHz
    Efficiency (peak)94 % 96 % 94 % 94 % 94 % 94 % 94 %
    Integrated InductorYes Yes Yes Yes Yes Yes Yes
    PowerGood / Error FlagNo No No No No No No
    SoftStartYes Yes Yes Yes Yes Yes Yes
    Sync PinNo No No No No No No
    InvertingNo No No No No No No
    FlybackNo No No No No No No
    RegTypePower Module Power Module Power Module Power Module Power Module Power Module Power Module
    Temperature Min-40 deg C -40 deg C -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 125 deg C 125 deg C
    Adjustable OutputYes Yes Yes Yes Yes Yes Yes
    Adj Switch FrequencyYes No Yes Yes Yes Yes Yes
    PWM ModeConstant On-time Voltage Mode Control Constant On-time Constant On-time Constant On-time Constant On-time Constant On-time
    TopologyBuck Buck Buck Buck Buck Buck Buck
    Special FeaturesLow EMI Low EMI Low EMI Low EMI Low EMI Low EMI Low EMI
    Step-DownYes Yes Yes Yes Yes Yes Yes
    Multiple Output CapabilityNo No No No No No No
    Output Power18 Watt 20 Watt 6 Watt 12 Watt 18 Watt 6 Watt 12 Watt
    Output VoltageUndefined Volt Undefined Volt Undefined Volt
    Output Range0.8V to 6.0V 0.8V to 5.0V 0.8V to 6.0V 0.8V to 6.0V 0.8V to 6.0V 0.8V to 6.0V 0.8V to 6.0V
    Switching FrequencyUndefined kHz 1000 kHz Undefined kHz
    Feedback Voltage0.8 Volt 0.8 Volt 0.8 Volt 0.8 Volt 0.8 Volt 0.8 Volt 0.8 Volt
    On/Off PinYes Yes Yes Yes Yes Yes Yes
    Regulator FamilySIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER
    AutomotiveNo No No No No No No
    PowerWiseYes Yes Yes Yes Yes Yes Yes
    Synchronous RectificationYes Yes Yes Yes Yes Yes Yes
    Quiescent Current1 mA 1.7 mA 1 mA 1 mA 1 mA 1 mA 1 mA

    Datasheets
    TitleSizeDateOther
    Language
    LMZ14203 3A SIMPLE SWITCHER® Power Module with 42V Maximum Input Voltage1136
    Kbytes
    16-Jun-11日本語
    中文


    Application Notes
    TitleSizeDateOther
    Language
    AN-2024: Application Note 2024 LMZ1420x / LMZ1200x Evaluation Board697
    Kbytes
    26-Mar-10 中文
    AN-2032: Application Note 2032 LMZ14202 / LMZ14203 Demo Board SIMPLE SWITCHER® Power Module Quick Start Guide409
    Kbytes
    14-Sep-11 
    AN-2027: Application Note 2027 Inverting Application for the LMZ14203 SIMPLE SWITCHER® Power Module1084
    Kbytes
    24-Mar-10 中文
    AN-2078: Application Note 2078 PCB Layout for National Semiconductor`s SIMPLE SWITCHER® Power Modules513
    Kbytes
    16-Sep-10 
    AN-2026: Application Note 2026 The Effect of PCB Design on the Thermal Performance of SIMPLE SWITCHER® Power Modules443
    Kbytes
    8-Feb-10 中文
    AN-2162: Application Note 2162 Simple Success With Conducted EMI From DC-DC Converters2031
    Kbytes
    27-Jan-12 
    AN-2052: Application Note 2052 National Semiconductor’s Simple Switcher® Power Modules and EMI153
    Kbytes
    26-Apr-10 中文
    AN-2146: Application Note 2146 Power Design for SDI and other Noise Sensitive Devices516
    Kbytes
    9-Aug-11 
    AN-2020: Application Note 2020 Thermal Design By Insight, Not Hindsight603
    Kbytes
    13-Jun-11 中文


    Other Technical Documents
    TitleTypeDate
    Power Supply Design Considerations for Modern FPGAsPower Designer 2010-02-02
    Comparing the Merits of Integrated Power Modules versus Discrete RegulatorsPower Designer 2010-06-22
    PCB Layout Techniques to Maximize Power Module PerformanceExternal Article 2010-08-22
    SIMPLE SWITCHER® Design GuideDesign Guide 2011-04-11

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMZ14203TZ-ADJ/NOPB


    RoHS Status


    TO-PMOD
    Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    ARROWWorldwide163
    AVNET-EMWorldwide126
    DIGI-KEYWorldwide180
    FARNELLEurope and Asia224
    KEIKONGAsia Pacific700
    MOUSERWorldwide498
    NEWARKAmericas224
    TAYLORAmericas163
    $8.95 each at 1K+ pcsreel
    of
    250
    LMZ14203TZE-ADJ/NOPB


    RoHS Status


    TO-PMOD
    Full production
    Lead Time: 10 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide41
    $8.95 each at 1K+ pcsrail
    of
    45
    LMZ14203TZX-ADJ/NOPB


    RoHS Status


    TO-PMOD
    Full production
    Lead Time: 10 weeks

     
    DistributorRegionQty
    ARROWWorldwide500
    AVNET-EMWorldwide390
    CEACAsia Pacific1000
    DIGI-KEYWorldwide0
    FARNELLEurope and Asia306
    MOUSERWorldwide1500
    NEWARKAmericas306
    TAYLORAmericas500
    $8.95 each at 1K+ 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 LMZ14203.

    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 LMZ14203 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMZ14203DEMO/NOPB

    Simple Switcher® Power Module 42Vin, 3A Demonstration BoardFull production
    Lead Free (RoHS)

     
    DistributorRegionQty
    AVNET-EMWorldwide2
    DIGI-KEYWorldwide0
    MOUSERWorldwide1
    TAYLORAmericas10
    $15.00 each1

    The SIMPLE SWITCHER power module demonstration board is optimized for peak performance and small footprint. The output voltage and fast transient response can be adjusted by replacing the small passive components. The good thermal performance of the power modules is showcased using a 2-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 0603 passives on back side showcasing production ready layout
    • 2.3 in. x 1.7 in. (5.8 cm x 4.3 cm) 2-layer PCB. Uses 1oz copper on top and bottom

    Contents

    • LMZ14203 4A SIMPLE SWITCHER® Power Module with 42V Maximum Input Voltage Demonstration Board (blue soldermask)

    Other Resources


    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMZ14203EVAL/NOPB

    Simple Switcher ® Power Module 42Vin, 3A Eval BoardFull production
    Lead Free (RoHS)

     
    DistributorRegionQty
    AVNET-EMWorldwide4
    DIGI-KEYWorldwide18
    MOUSERWorldwide1
    $24.00 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

    • LMZ14203 3A SIMPLE SWITCHER® Power Module with 42V Maximum Input Voltage Evaluation Board
    • Application Note 2024 for the LMZ14203 Evaluation Board

    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
    LMZ14203TZ-ADJ/NOPB

    1556.015
    TO-PMOD73245DetailDownloadN/A
    NSUZXYTTE#
    LMZ14203
    TZ-ADJ
    LMZ14203TZE-ADJ/NOPB

    1556.015
    TO-PMOD73245DetailDownloadN/A
    NSUZXYTTE#
    LMZ14203
    TZ-ADJ
    LMZ14203TZX-ADJ/NOPB

    1556.015
    TO-PMOD73245DetailDownloadN/A
    NSUZXYTTE#
    LMZ14203
    TZ-ADJ

    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 LMZ14203.

    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 LMZ14203 is located at RoHS Status.

    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LMZ14203TZ-ADJABCD15004268000639400011814314958
    LMZ14203TZE-ADJABCD15004268000639400011814314958
    LMZ14203TZX-ADJABCD15004268000639400011814314958

    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 LMZ14203.

    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 LMZ14203 is located at RoHS Status.

    What's New in Power Management -- February 2010
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    SIMPLE SWITCHER® Power Module Overview
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    Multi-Load Power Supply Design with WEBENCH Power Architect
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    SIMPLE SWITCHER Modules Power Avnet Spartan-6 Development Kit
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    What's New in Power Management -- February 2010
    Date: 2010-02-15
    Length: 0:6:02
    SIMPLE SWITCHER® Power Module Overview
    Date: 2010-01-25
    Length: 0:04:53
    Multi-Load Power Supply Design with WEBENCH Power Architect
    Date: 2010-01-21
    Length: 0:17:00
    SIMPLE SWITCHER Modules Power Avnet Spartan-6 Development Kit
    Date: 2010-02-16
    Length: 0:19:38
    [Information as of 8-Feb-2012]