LM2640MTC-ADJ/NOPB

Power Supply Controllers, Monitors Overview

The LM2640MTC-ADJ/NOPB is a dual-output DC-DC switching regulator manufactured by Texas Instruments, originally part of the National Semiconductor portfolio. It integrates two independent buck converters within a single package to provide efficient power management for portable applications. The device operates with an input voltage range from 2.7V to 5.5V and delivers up to 2A per channel. It features adjustable output voltages controlled via external resistors, enabling flexible design configurations. The unit utilizes current mode control for rapid transient response and includes comprehensive protection mechanisms such as thermal shutdown and current limiting.

Power Supply Controllers, Monitors Feature Summary

• Dual independent step-down converter topology integrated into a single compact package
• Current mode control architecture ensuring fast transient response and inherent cycle-by-cycle current limiting
• Integrated thermal shutdown circuitry to protect the device during overtemperature conditions
• Adjustable output voltage capability through external resistor networks for customized power rails

Power Supply Controllers, Monitors Applications

• Portable electronic devices requiring multiple regulated voltage rails from a single source
• Battery-powered systems needing efficient step-down conversion from lithium-ion cells
• Embedded circuits utilizing microcontrollers or DSPs that require separate analog and digital power supplies

Power Supply Controllers, Monitors Procurement Notes

Verify the manufacturer designation on the datasheet, as the component is now produced under Texas Instruments following the acquisition of National Semiconductor. Confirm the suffix NOPB indicates lead-free and RoHS compliance. Ensure the MTC package marking matches the specific pinout requirements for your PCB layout. Cross-reference the exact part number with official TI documentation to confirm availability and revision status before finalizing procurement.

Power Supply Controllers, Monitors Selection Notes

Select this component when space constraints necessitate integrating two buck regulators into one footprint. It is suitable for designs requiring independent adjustment of two output voltages from a common input source. Consider the thermal performance of the MTC package in relation to the expected load currents. Verify that the required output voltage ranges fall within the adjustable limits supported by the external feedback network configuration.

Power Supply Controllers, Monitors Part Context

This component belongs to the LM2640 family of dual synchronous buck converters. It was originally developed by National Semiconductor and is now maintained by Texas Instruments. The family is designed for high-efficiency power conversion in mobile and handheld applications. The LM2640 series provides a solution for reducing component count and board area compared to using discrete regulators.

Power Supply Controllers, Monitors Replacement Considerations

Direct substitutes include other dual-channel buck regulators from Texas Instruments such as the LM26400 series variants. Check pin compatibility and electrical specifications before substituting. Ensure the replacement supports the same input voltage range and output current capabilities.