LM2631 Datasheet (National Semiconductor) - Synchronous Step-Down Power Supply Controller

LM2631, Synchronous Step-Down Power Supply Controller

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.

Inexpensive

LM2631 Features

* 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 c