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LM3671LC-1.6 Evaluation Board



  • 16 µ A typical quiescent current
  • 600mA maximum load capability
  • 2 MHz PWM fixed switching frequency (typ)
  • Automatic PFM/WM mode switching
  • Internal synchronous rectification for high efficiency
  • Internal soft start
  • 0.01 µA typical shutdown current
  • Operates from a single Li-Ion cell battery
  • Only three tiny surface-mount external components required (one inductor, two ceramic capacitors)
  • Current overload and Thermal shutdown protection
  • Available in fixed output voltages and adjustable version
  • SOT23-5, 5-bump micro SMD and 6-pin LLP packages


  • Mobile phones
  • PDAs
  • MP3 players
  • W-LAN
  • Portable Instruments
  • Digital still cameras
  • Portable Hard disk drives

Texas Instruments  LM3671LC-1.6EV

The LM3671 step-down DC-DC converter is optimized for powering low voltage circuits from a single Li-Ion battery and input voltage rails from 2.7V to 5.5V. It provides up to 600mA load current, over the entire input voltage range. There are several different fixed voltage output options available as well as an adjustable output voltage version range from 1.1V to 3.3V.

The LM3677 evaluation board is a working demonstration of a step down DC-DC converter. This application note contains information about the evaluation board. For further information on buck converter topology, device electrical characteristics, and component selection, please refer to the datasheet.