National Semiconductor | High-performance Analog

 

 LM3152   

SIMPLE SWITCHER® CONTROLLER, 42V Synchronous Step-Down
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Features

  • PowerWise ® step-down controller
  • 6V to 42V Wide input voltage range
  • Fixed output voltage of 3.3V
  • Fixed switching frequencies of 250 kHz/500 kHz/750 kHz
  • No loop compensation required
  • Fully WEBENCH ® enabled
  • Low external component count
  • Constant On-Time control
  • Ultra-Fast transient response
  • Stable with low ESR capacitors
  • Output voltage pre-bias startup
  • Valley current limit
  • Programmable soft-start
  • Description

    The LM3151/2/3 SIMPLE SWITCHER ® Controller is an easy to use and simplified step down power controller capable of providing up to 12A of output current in a typical application. Operating with an input voltage range from 6V-42V, the LM3151/2/3 features a fixed output voltage of 3.3V, and features switching frequencies of 250 kHz, 500 kHz, and 750 kHz. The synchronous architecture provides for highly efficient designs. The LM3151/2/3 controller employs a Constant On-Time (COT) architecture with a proprietary Emulated Ripple Mode (ERM) control that allows for the use of low ESR output capacitors, which reduces overall solution size and output voltage ripple. The Constant On-Time (COT) regulation architecture allows for fast transient response and requires no loop compensation, which reduces external component count and reduces design complexity.

    Fault protection features such as thermal shutdown, under-voltage lockout, over-voltage protection, short-circuit protection, current limit, and output voltage pre-bias startup allow for a reliable and robust solution.

    The LM3151/2/3 SIMPLE SWITCHER ® concept provides for an easy to use complete design using a minimum number of external components and National’s WEBENCH ® online design tool. WEBENCH ® provides design support for every step of the design process and includes features such as external component calculation with a new MOSFET selector, electrical simulation, thermal simulation, and Build-It boards for prototyping.

    WEBENCH® LM3152
        Min   Max   Range  
      VIN V    6.00 – 33.00V  
      VOUT V    3.30 – 3.30V  
      IOUT A    ≤ 12.00A  
      Ambient Temp °C    ≤ 100°C  
    Footprint BOM Cost Efficiency
    What are WEBENCH® tools?


    Also Recommended
    LM315012A SIMPLE SWITCHER Controller With Adjusable Output Voltage And Frequency
    LM315112A SIMPLE SWITCHER Controller With Fixed 3.3V, 250kHz Output
    LM315312A SIMPLE SWITCHER Controller With Fixed 3.3V, 750kHz Output



    Parameters / ValuesLM3152 LM3150 LM3151 LM3153
    Output Current12000 mA 12000 mA 12000 mA 12000 mA
    Input Min Voltage6 Volt 6 Volt 6 Volt 8 Volt
    Input Max Voltage33 Volt 42 Volt 42 Volt 18 Volt
    Feedback Voltage0.6 Volt 0.6 Volt 0.6 Volt 0.6 Volt
    Feedback Tolerance1.5 % 1.5 % 1.5 % 1.5 %
    Frequency Min500 kHz 250 kHz 750 kHz
    Frequency Max500 kHz 1000 kHz 250 kHz 750 kHz
    Efficiency (peak)95 % 95 % 95 % 95 %
    Output Range3.3V Adjustable down to 0.6V 3.3V 3.3V
    Adj Switch FrequencyNo Yes No No
    Adjustable OutputNo Yes No No
    Synchronous RectificationYes Yes Yes Yes
    On/Off PinYes Yes Yes Yes
    PowerGood / Error FlagNo No No No
    SoftStartYes Yes Yes Yes
    Sync PinNo No No No
    InvertingNo No No No
    FlybackNo No No No
    Lossless Current SenseNo No No No
    RegTypeSwitching Controller Switching Controller Switching Controller Switching Controller
    Temperature Min-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
    TopologyStep-Down/Buck Step-Down/Buck Step-Down/Buck Step-Down/Buck
    Step-DownYes Yes Yes Yes
    Step-UpNo No No No
    Multiple Output CapabilityNo No No No
    Regulator FamilySIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER
    Output Max3.3 Volt 3.3 Volt 3.3 Volt
    Output Min3.3 Volt 3.3 Volt 3.3 Volt
    PowerWiseYes Yes Yes Yes
    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM3152MH-3.3/NOPB


    RoHS Status


    TSSOP EXP PAD
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide138
    AVNET-EMWorldwide251
    DIGI-KEYWorldwide0
    MOUSERWorldwide182
    TAYLORAmericas138
    $1.77 each at 1K+ pcsrail
    of
    94
    LM3152MHE-3.3/NOPB


    RoHS Status


    TSSOP EXP PAD
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide250
    DIGI-KEYWorldwide13
    MOUSERWorldwide250
    TAYLORAmericas250
    $1.77 each at 1K+ pcsreel
    of
    250
    LM3152MHX-3.3/NOPB


    RoHS Status


    TSSOP EXP PAD
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $1.77 each at 1K+ pcsreel
    of
    2500

    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 LM3152.

    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 LM3152 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM3152-3.3DEMO
    LM3152 - RD-164 - Demonstration BoardFull production


     
    DistributorRegionQty
    AVNET-EMWorldwide19
    MOUSERWorldwide2
    $19.00 each1

    Description:

    The LM3152-3.3 demonstration board is a part of the PowerWise® family of SIMPLE SWITCHER® Controllers. It has been designed to balance solution size and performance. The Constant-On-Time (COT) Emulated Ripple Mode (ERM) Control allows for the use of low ESR output capacitors and therefore decreases the output voltage ripple while maintaining a fast transient response. There is no loop compensation required for the COT architecture , as there is in voltage-mode and current mode control architectures, which helps to facilitate the ease of design and fast transient response. The demoboard uses a 2-layer , 2 ounce copper PCB with all of the components mounted on the top side. The LM3152-3.3 IC has a fixed output voltage of 3.3V and will operate over the input voltage range of 6V to 24V at 10A load current.

    Features:

    • Easy To Use with Webench and Offline Design Tools
    • No Loop Compensation Required
    • Low Solution Component Count
    • Ultra-Fast Transient Response
    • Low Output Voltage Ripple (32mVpp)
    • 3.3V Fixed Output Voltage
    • Optimized for 10A Average Load Current
    • 95% Peak Efficiency
    • Constant-On-Time with Emulated Ripple Mode Control
    • 500 kHz Switching Frequency

    Contents:

    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
    LM3152MH-3.3/NOPB

    53.783
    TSSOP EXP PAD141260DetailDownloadN/A
    NSUZXYTT
    LM3152
    -3.3
    LM3152MHE-3.3/NOPB

    53.783
    TSSOP EXP PAD141260DetailDownloadN/A
    NSUZXYTT
    LM3152
    -3.3
    LM3152MHX-3.3/NOPB

    53.783
    TSSOP EXP PAD141260DetailDownloadN/A
    NSUZXYTT
    LM3152
    -3.3

    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 LM3152.

    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 LM3152 is located at RoHS Status.

    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM3152MH-3.3ABCD5053640016269843461661152
    LM3152MHE-3.3ABCD5053640016269843461661152
    LM3152MHX-3.3ABCD5053640016269843461661152

    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 LM3152.

    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 LM3152 is located at RoHS Status.

    WEBENCH® Power Designer Tool & New LM315x SIMPLE SWITCHER® Controller Technical Overview
    Click image to play video in new window


    LM315x LM2267x Simple Switcher Controllers Regulators & WEBENCH Power Designer
    Loading video...


    WEBENCH® Power Designer Tool & New LM315x SIMPLE SWITCHER® Controller Technical Overview
    Date: 2009-03-17
    Length: 00:41:00
    LM315x LM2267x Simple Switcher Controllers Regulators & WEBENCH Power Designer
    Date: 2008-10-31
    Length: 0:6:33
    [Information as of 7-Feb-2012]