National Semiconductor | High-performance Analog

 

 LMZ10503EXT   

3A SIMPLE SWITCHER® Power Module with 5.5V Maximum Input Voltage for Military and Rugged Applications
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Features

Electrical Specifications

  • 15W maximum total output power
  • Up to 3A output current
  • Input voltage range 2.95V to 5.5V
  • Output voltage range 0.8V to 5V
  • ±1.63% feedback voltage accuracy over temperature
  • Efficiency up to 96%
  • Key Features

  • Integrated shielded inductor
  • Flexible startup sequencing using external soft-start, tracking, and precision enable
  • Protection against in-rush currents and faults such as input UVLO and output short-circuit
  • -55°C to +125°C junction temperature operating range
  • Single exposed pad and standard pinout for easy mounting and manufacturing
  • Pin-to-pin compatible with

  • LMZ10504EXT (4A/20W max)

  • LMZ10505EXT (5A/25W max)
  • Fully enable for WEBENCH® and Power Designer
  • Low output voltage ripple of 10 mV allows for powering noise-sensitive transceiver and signaling ICs
  • Fast transient response for powering FPGAs and ASICs
  • Performance Benefits

  • Operates at high ambient temperatures
  • Low radiated emissions (EMI) complies with EN55022 class B standard
  • Passes 10V/m radiated immunity EMI test standard EN61000 4-3
  • 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 LMZ10503EXT SIMPLE SWITCHER® power module is a complete, easy-to-use DC-DC solution capable of driving up to a 3A load with exceptional power conversion efficiency, output voltage accuracy, line and load regulation. The LMZ10503EXT is available in an innovative package that enhances thermal performance and allows for hand or machine soldering.

    The LMZ10503EXT can accept an input voltage rail between 2.95V and 5.5V and deliver an adjustable and highly accurate output voltage as low as 0.8V. One megahertz fixed frequency PWM switching provides a predictable EMI characteristic. Two external compensation components can be adjusted to set the fastest response time, while allowing the option to use ceramic and/or electrolytic output capacitors. Externally programmable soft-start capacitor facilitates controlled startup. The LMZ10503EXT is a reliable and robust solution with the following features: lossless cycle-by-cycle peak current limit to protect for over current or short-circuit fault, thermal shutdown, input under-voltage lock-out, and pre-biased startup.


    Applications

  • Point-of-load conversions from 3.3V and 5V rails
  • Space constrained applications
  • Extreme temperatures/no air flow environments
  • Noise sensitive applications (i.e. transceiver, medical)
  • WEBENCH® LMZ10503EXT
        Min   Max   Range  
      VIN V    2.95 – 5.50V  
      VOUT V    0.80 – 4.50V  
      IOUT A    ≤ 3.00A  
      Ambient Temp °C    ≤ 100°C  
    Footprint BOM Cost Efficiency
    What are WEBENCH® tools?





    Typical Application
    click for larger image


    Block Diagram
    click for larger image



    Typical Performance
    click for larger image


     

    ParametersValues
    Output Current 3000 mA
    Input Min Voltage 2.95 Volt
    Input Max Voltage 5.5 Volt
    Output Min 0.8 Volt
    Output Max 5 Volt
    Efficiency (peak) 96 %
    Integrated Inductor Yes
    PowerGood / Error Flag No
    SoftStart Yes
    Sync Pin No
    Inverting No
    Flyback No
    RegType Power Module
    Temperature Min -55 deg C
    Temperature Max 125 deg C
    Adjustable Output Yes
    Adj Switch Frequency No
    PWM Mode Voltage Mode Control
    Topology Buck
    Special Features Low EMI
    Step-Down Yes
    Multiple Output Capability No
    Output Power 15 Watt
    Output Range 0.8V to 5.0V
    Switching Frequency 300, 1000 kHz
    Feedback Voltage 0.8 Volt
    On/Off Pin Yes
    Regulator Family SIMPLE SWITCHER
    Automotive No
    PowerWise Yes
    Synchronous Rectification Yes
    Quiescent Current 1.7 mA

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMZ10503EXTTZ/NOPB


    RoHS Status


    TO-PMOD
    Full production
    Lead Time: 10 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide250
    DIGI-KEYWorldwide496
    MOUSERWorldwide250
    $12.60 each at 100+ pcsreel
    of
    250
    LMZ10503EXTTZE/NOPB


    RoHS Status


    TO-PMOD
    Full production
    Lead Time: 10 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide45
    DIGI-KEYWorldwide0
    MOUSERWorldwide29
    $12.60 each at 100+ pcsrail
    of
    45
    LMZ10503EXTTZX/NOPB


    RoHS Status


    TO-PMOD
    Full production
    Lead Time: 10 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $12.60 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 LMZ10503EXT.

    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 LMZ10503EXT is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMZ10503EXTEVAL/NOPB

    Simple Switcher® Extended Temp Power Module 5.5Vin, 3A Eval BoardFull production
    Lead Free (RoHS)

     
    DistributorRegionQty
    AVNET-EMWorldwide7
    DIGI-KEYWorldwide5
    MOUSERWorldwide2
    $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 the module)
    • Efficiency
      • Up to 96% (LMZ10503)
    • 2.5V output (output voltage is adjustable by changing 1 or 2 resistors)
    • 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
    • 2.25" x 2.25" (5.8 cm x 5.8 cm) 4-layer PCB. Uses 1oz copper on top and bottom, 1/2 oz copper on inner layers

    Contents

    • LMZ10503EXT 3A SIMPLE SWITCHER® Power Module with 5.5V Maximum Input Voltage Evaluation Board
    • Application Note 2074 for the LMZ1050xEXT 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
    LMZ10503EXTTZ/NOPB

    1556.015
    TO-PMOD73245DetailN/AN/A
    NSUZXYTTE#
    LMZ10503
    EXT
    LMZ10503EXTTZE/NOPB

    1556.015
    TO-PMOD73245DetailN/AN/A
    NSUZXYTTE#
    LMZ10503
    EXT
    LMZ10503EXTTZX/NOPB

    1556.015
    TO-PMOD73245DetailN/AN/A
    NSUZXYTTE#
    LMZ10503
    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 LMZ10503EXT.

    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 LMZ10503EXT 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)
    LMZ10503EXTTZCMOS70213010015840003449464325
    LMZ10503EXTTZECMOS70213010015840003449464325
    LMZ10503EXTTZXCMOS70213010015840003449464325

    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 LMZ10503EXT.

    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 LMZ10503EXT 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]