LM2631 - Synchronous Step-Down Power Supply Controller

Product Overview

National Semiconductor

Part number	LM2631
Manufacturer	National Semiconductor
File Size	265.84 KB
Description	Synchronous Step-Down Power Supply Controller
Datasheet	LM2631 Datasheet
Additional preview pages of the LM2631 datasheet.

The LM2631 controller provides all the active functions for step-down (buck) switching converters.

These dc-to-dc converters provide core CPU power in battery-operated systems.

High efficiency is achieved by using synchronous rectification and pulse-skipping mode operation at light load.

include the external synchronization pin, and the PGOOD pin to indicate the state of the output voltage. Protection circuitry includes thermal shutdown, undervoltage and overvoltage shutdown protection, soft-start capability, and two levels of current limits: The first level simply limits the load current directly; at the second level, if the load pulls the output voltage down below 80% of the regulated value, the chip will shut down. This operation is disabled during startup, but an internal ti.

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Published: Mar 22, 2005 |