LM3743MMX-1000

DC DC Switching Controllers Overview

The LM3743MMX-1000/NOPB is a high-performance synchronous buck controller manufactured by Texas Instruments. It operates at a fixed switching frequency of 1 MHz and supports an output voltage range from 800 mV to 4.6 V with a maximum output current capability of 20 A. The device features a maximum duty cycle of 76% and functions within a supply voltage range of 3 V to 5.5 V. It is housed in a 10-VSSOP package and is designed for operation across a temperature range of -40°C to +125°C TJ.

DC DC Switching Controllers Feature Summary

• Integrated synchronous rectification for improved efficiency
• Comprehensive fault protection features including overcurrent and thermal protection
• Built-in soft-start and tracking capabilities for controlled power-up sequences

DC DC Switching Controllers Applications

• Power supply design for modern FPGAs
• High-reliability system DC/DC conversion
• Non-isolated step-down output regulation

DC DC Switching Controllers Procurement Notes

Verify the specific suffix (e.g., /NOPB) against the official datasheet to ensure compliance with RoHS standards and lead-free manufacturing requirements. Confirm that the 10-VSSOP package matches the target PCB footprint. Note that availability status may vary as this component has been marked as obsolete or discontinued in certain distributor records; check for active stock or valid replacement part numbers before finalizing procurement plans.

DC DC Switching Controllers Selection Notes

Select this controller when a fixed 1 MHz switching frequency is required to minimize passive component size while maintaining high efficiency through synchronous rectification. Ensure the application demands an output voltage within the 800 mV to 4.6 V window and can accommodate the 20 A current limit. Verify that the control interface supports the necessary enable, soft-start, and tracking functionalities required by the system architecture.

DC DC Switching Controllers Part Context

This component belongs to the LM3743 series of high-performance synchronous buck controllers. It is specifically engineered for applications requiring robust fault protection and precise voltage regulation. The '1000' designation typically indicates the 1 MHz switching frequency variant within the family, distinguishing it from other frequency options available in the same product line.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not explicitly listed in the provided documentation. Users should consult the official TI website or authorized distributors for current obsolescence notices and recommended alternative devices within the LM3743 family or newer generations.