LM2641MTCX-ADJ/NOPB

Power Supply Controllers, Monitors Overview

The LM2641MTCX-ADJ/NOPB is a dual adjustable step-down switching power supply controller manufactured by Texas Instruments. Designed for notebook and portable applications, it operates with an input voltage range of 3V to 28V. The device integrates two synchronous buck controllers capable of delivering up to 2A per channel. It features a fixed 300kHz switching frequency and supports external synchronization. Key electrical parameters include a minimum operating temperature of -40°C and a maximum of +125°C. The component is housed in a 28-pin TSSOP package.

Power Supply Controllers, Monitors Feature Summary

• Dual-channel architecture providing independent control for two step-down converters
• Adjustable output voltage capability via external resistor networks
• Integrated high-side and low-side gate drivers for synchronous rectification
• Fixed 300kHz switching frequency with optional external clock synchronization

Power Supply Controllers, Monitors Applications

• Notebook computer main power rails
• Portable electronic devices requiring multiple voltage levels
• Industrial control systems with dual supply requirements
• Telecommunications equipment power distribution

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'ADJ' confirms adjustable output configuration rather than fixed voltage variants. Ensure the 'NOPB' designation indicates lead-free and RoHS compliance status as required by your assembly standards. Cross-reference the 28-TSSOP package dimensions against your PCB footprint library to confirm mechanical compatibility before finalizing procurement orders.

Power Supply Controllers, Monitors Selection Notes

Select this controller when designing dual-output DC-DC converters for space-constrained environments. It is suitable for applications requiring efficient power conversion from battery or adapter sources. Consider the thermal performance of the TSSOP package relative to your expected load currents. Evaluate the need for external synchronization if noise immunity is critical in your system design.

Power Supply Controllers, Monitors Part Context

This component belongs to the LM264x family of dual synchronous buck controllers from Texas Instruments. It is engineered to replace older discrete solutions or single-channel controllers in multi-rail designs. The series is widely used in consumer electronics and industrial markets where board space and efficiency are primary design constraints.

Power Supply Controllers, Monitors Replacement Considerations

Direct pin-to-pin replacements within the same family may include other LM264x variants with different frequency options or current ratings. Verify that any substitute part maintains the 28-TSSOP package and compatible control logic. Check datasheets for differences in enable thresholds or soft-start timing if migrating between sub-models.