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Home » NEWEST Products » New by Manufacturer » Texas Instruments » LM25117 Synchronous Buck Controller - TI
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National Products from Texas Instruments LM25117 Synchronous Buck Controller

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TI LM25117 Synchronous Buck Controller

Texas Instruments LM25117 Synchronous Buck Controller is 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. TI LM25117 Synchronous Buck Controller drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. Efficiency is further improved by a high voltage bias regulator that allows external bias supply. LM25117 provides a unique analog telemetry feature that offers average output current information. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit, and adjustable line under-voltage lockout.

Features
  • LM25117Q is an Automotive Grade product that is AEC-Q100 grade 1 qualified (-40°C to +125°C operating junction temperature)
  • Emulated peak current mode control
  • Wide operating range from 4.5V to 42V
  • Robust 3.3A peak gate drives
  • Adaptive dead-time output driver control
  • 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
Applications
  • Step-down regulator applications from a high voltage or widely varying input supply
  • Texas Instruments
  • Power Management
  • Semiconductors|Integrated Circuits|IC-Power Management