Large selection of step-down DC-DC regulators with synchronous rectification

In the quest for higher efficiency and compact form factor in their DC-DC supply designs, engineers now have a few more allies: the L6985F, L6986F and L6986 step-down DC-DC regulators with synchronous rectification and an output current of 0.5 A, 1,5 A and 2 A respectively.
Based on a peak current mode architecture with a p-channel power MOSFET, they feature a selectable low-consumption-mode (LCM burst mode) to increase efficiency at light load, and a low-noise-mode (LNM with fixed PWM switching frequency) for noise-sensitive designs.

They all feature:

  • 4 V to 38 V input voltage (VIN ) and output voltage adjustable from 0.85 V up-to VIN
  • Quiescent current as low as 30 μA at light load and 8 μA at shut down
  • Adjustable switching frequency (up to 2 MHz)
  • Embedded output voltage supervisor, synchronization and output voltage sequencing
  • On-chip current limiting, over-voltage protection, thermal shutdown and adjustable soft-start time

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