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直流-直流开关式转换器

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。
该系列IC由高度专业化的产品组成,满足了个市场的要求:工业和汽车应用所需HV(高压)技术、高可靠性和耐用性,小型化,任何负载下的高效率以及消费类和计算机产品所需的高性能。

为了增加MTBF(平均无故障时间)和减少外部元件的数量,这些器件都嵌入了全套保护功能(过流、过压和过热)。

提供了多种封装选项,全都可以实现小型化和高散热性能以满足不同应用的要求。
 

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eDesignSuite

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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