Version 14
    Texas Instruments > Power Management > Synchronous Buck Converter >

    Features of LM5117/ LM5117-Q1:

    • LM5117-Q1 is an Automotive Grade product that is AEC-Q100 grade 1 qualified (-40°C to 125°C operating junction temperature)
    • Emulated Peak Current Mode Contro
    • Wide Operating Range from 5.5V to 65V
    • Robust 3.3A Peak Gate Drives
    • Adaptive Dead-Time Output Driver uontrol
    • Free-Run or Synchronizable Clock up to 750kHz
    • Optional Diode Emulation Mode
    • Programmable Output from 0.8V
    • Precision 1.5% Voltage Reference
    • Analog Current Monitor
    • Programmable Current Limit
    • Hiccup Mode Over Current Protection
    • Programmable Soft-Start and Tracking
    • Programmable Line Under-voltage Lockout
    • Programmable Switch-Over to External Bias Supply
    • Thermal Shutdown

    The LM5117 evaluation board provides the design engineer with a fully functional synchronous buck converter based on Emulated Current Mode Control to evaluate the LM5117 controller IC. The evaluation board provides 12V output with a 9A current capability in addition with average output current information. The input voltage ranges from 15V to 55V.

    The LM5117 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle-by cycle current limiting and ease of loop compensation The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit allowing reliable control of very small duty cycles necessary in high input voltage applications.



    Simulation Model/CAD ModelsLM5117 PSpice Transient Model (Rev. A) (.zip)