LM2642 Datasheet Two-phase Synchronous Step-down Switching Controller

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: LM2642 Two-Phase Synchronous Step-Down Switching Controller May 2003 LM2642 Two-Phase Synchronous Step-Down Switching.

Datasheet Details

Part number	LM2642
Manufacturer	National Semiconductor (now Texas Instruments)
File Size	643.89 KB
Description	Two-Phase Synchronous Step-Down Switching Controller
Datasheet	LM2642_NationalSemiconductor.pdf

The LM2642 consists of two current mode synchronous buck regulator controllers with a switching frequency of 300kHz.

The two switching regulator controllers operate 180˚ out of phase.

This

analog soft-start circuitry that is independent of the output load and output capacitance. This makes the soft-start behavior more predictable and controllable than traditional soft-start circuits. A PGOOD1 pin is provided to monitor the dc output of channel 1. Over-voltage protection is available for both outputs. A UV-Delay pin is also available to allow delayed shut off time for the IC during an output under-voltage event. Features n n n n n n n n n n n n n n n n Two synchronous buck regulat.

Part Number	Description	Manufacturer
LM2642	Two-Phase Synchronous Step-Down Switching Controller	Texas Instruments
LM26420	High-Efficiency Synchronous DC/DC Converter	Texas Instruments
LM26420	High Frequency 2.0A Load - Step-Down DC-DC Regulator	National Semiconductor Corporation
LM26420-Q1	High-Efficiency Synchronous DC/DC Converter	Texas Instruments

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