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LM5000

ACTIVE

3.1-40V Wide Vin, 2A Current Mode Non-Synchronous Boost Regulator

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LM5158 ACTIVE 3-A, 85-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum Newer device with higher Vout capability and higher switch current

Product details

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  • 80V internal switch
  • Operating input voltage range of 3.1V to 40V
  • Pin selectable operating frequency
       300kHz/700kHz (-3)
       600kHz/1.3MHz (-6)
  • Adjustable output voltage
  • External compensation
  • Input undervoltage lockout
  • Softstart
  • Current limit
  • Over temperature protection
  • External shutdown
  • Small 16-Lead TSSOP or 16-Lead LLP package

  • 80V internal switch
  • Operating input voltage range of 3.1V to 40V
  • Pin selectable operating frequency
       300kHz/700kHz (-3)
       600kHz/1.3MHz (-6)
  • Adjustable output voltage
  • External compensation
  • Input undervoltage lockout
  • Softstart
  • Current limit
  • Over temperature protection
  • External shutdown
  • Small 16-Lead TSSOP or 16-Lead LLP package

  • The LM5000 is a monolithic integrated circuit specifically designed and optimized for flyback, boost or forward power converter applications. The internal power switch is rated for a maximum of 80V, with a current limit set to 2A. Protecting the power switch are current limit and thermal shutdown circuits. The current mode control scheme provides excellent rejection of line transients and cycle-by-cycle current limiting. An external compensation pin and the built-in slope compensation allow the user to optimize the frequency compensation. Other distinctive features include softstart to reduce stresses during start-up and an external shutdown pin for remote ON/OFF control. There are two operating frequency ranges available. The LM5000-3 is pin selectable for either 300kHz (FS Grounded) or 700kHz (FS Open). The LM5000-6 is pin selectable for either 600kHz (FS Grounded) or 1.3MHz (FS Open). The device is available in a low profile 16-lead TSSOP package or a thermally enhanced 16-lead LLP package.


    The LM5000 is a monolithic integrated circuit specifically designed and optimized for flyback, boost or forward power converter applications. The internal power switch is rated for a maximum of 80V, with a current limit set to 2A. Protecting the power switch are current limit and thermal shutdown circuits. The current mode control scheme provides excellent rejection of line transients and cycle-by-cycle current limiting. An external compensation pin and the built-in slope compensation allow the user to optimize the frequency compensation. Other distinctive features include softstart to reduce stresses during start-up and an external shutdown pin for remote ON/OFF control. There are two operating frequency ranges available. The LM5000-3 is pin selectable for either 300kHz (FS Grounded) or 700kHz (FS Open). The LM5000-6 is pin selectable for either 600kHz (FS Grounded) or 1.3MHz (FS Open). The device is available in a low profile 16-lead TSSOP package or a thermally enhanced 16-lead LLP package.


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    Technical documentation

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    Type Title Date
    * Data sheet LM5000 High Voltage Switch Mode Regulator datasheet (Rev. D) 09 Mar 2007
    Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
    Technical article High cell battery packs fuel new applications and extend time between charges 03 Sep 2015
    EVM User's guide LM5000EVAL Non-Isolated Flyback Evaluation Module User’s Guide 21 Jul 2014
    Technical article Why wide VIN ICs for a 12V or 24V rail? 29 Oct 2013
    Application note Automated Frequency Response Analyzer 09 Oct 2013
    White paper Wide VIN power management ICs simplify white paper (Rev. A) 19 Sep 2013
    White paper HV, Single-Chip DC/DC Reg Optimized for Flyback, Boost, or Frwd-Pwr Conv Apps 01 Oct 2003
    Application note HV, single IC DC/DC reg optimizd for flyback, boost, or forward pwr cnvrtr apps 24 Mar 2003

    Design & development

    For additional terms or required resources, click any title below to view the detail page where available.

    Evaluation board

    LM5000EVAL — Wide Vin Switch Mode Regulator Evaluation Module

    User guide: PDF
    Not available on TI.com
    Calculation tool

    FLYBUCK-FLYBACK-DESIGN-CALC — Fly-Buck and Flyback Topology Selector

    This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.
    Calculation tool

    LM5000MATHCAD-CALC — LM5000 Mathcad Design Tools

    Simulation tool

    PSPICE-FOR-TI — PSpice® for TI design and simulation tool

    PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
    Reference designs

    PMP7932 — Isolated Flyback Converter for Industrial Bias Supply - Reference Design

    PMP7932 is an isolated flyback converter which accepts an input voltage of 12Vin to 24Vin and provides dual polarity ouputs of +12Vout @ 0.25A and -12V @ 0.25A.
    Test report: PDF
    Schematic: PDF

    Ordering & quality

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