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Dual Synchronous Buck Regulator Controller



  • Input voltage range from 5.5V to 28V
  • Synchronous dual-channel interleaved switching
  • Forced-PWM or Pulse-skip modes
  • Lossless bottom-side FET current sensing
  • Adaptive duty cycle clamping
  • High current N-channel FET drivers
  • Low shutdown supply currents
  • Reference voltage accurate to within ?1.5%
  • Output voltage adjustable down to 0.6V
  • Power Good flag and Chip Enable
  • Under-voltage lockout
  • Over-voltage/Under-voltage protection
  • Soft-start and Soft-shutdown
  • Switching frequency adjustable 200kHz-500kHz


  • Notebook chipset power supplies
  • Low output voltage high-efficiency buck regulators


Texas Instruments  LM2647EVAL

LM2647 Dual Synchronous Buck Regulator Controller