LM5642XMH

Overview

The LM5642XMH/NOPB is a high-voltage dual synchronous buck controller manufactured by Texas Instruments. It operates with an input voltage range of 4.5V to 36V and supports output voltages from 1.3V to 32.4V. The device features a fixed switching frequency of 200 kHz and delivers up to 20A per channel. It utilizes a 28-pin HTSSOP package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Dual-channel architecture for independent power rail generation
• High-voltage operation capability for direct bus connection
• Integrated synchronous rectification control

Applications

• Industrial power supply systems
• Telecommunications infrastructure equipment
• Server and networking hardware power distribution

Procurement Notes

Verify the specific suffix against official documentation, as variations may exist between tape-and-reel and tube packaging options. Confirm RoHS compliance status through current manufacturer declarations. Ensure the ordering part number matches the required package style and moisture sensitivity level for your assembly process.

Selection Notes

Select this component when designing systems requiring two isolated or non-isolated low-voltage outputs from a higher voltage bus. The 200 kHz frequency offers a balance between component size and efficiency. Consider thermal management requirements given the HTSSOP package and potential load currents in industrial environments.

Part Context

This controller belongs to the LM5642X family of power management integrated circuits designed for robust DC-DC conversion applications. It serves as a core control element in multi-rail power architectures, replacing discrete driver solutions to reduce board space and improve reliability in complex electronic systems.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.