ST Life.augmented


意法半导体’的单片式开关稳压器具有高达55 V的输入电压能力,以很高的开关频率实现了高达4 A的输出电流。




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 few more allies: the L6985F, L6986F and L6986 step-downs DC-DC regulators with synchronous rectification for and output current of 0.5A, 1,5A and 2A respectively.

Based on a peak current mode architecture with a P-channel power MOSFET, they provide a selectable low-consumption-mode (LCM burst mode), when efficiency at all load conditions is paramount, and 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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