LM2677SX-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677SX-ADJ is a SIMPLE SWITCHER high-efficiency 5A step-down voltage regulator from Texas Instruments. It operates with an input voltage range of 4.5V to 40V and provides an adjustable output voltage from 1.2V to 37V. The device features a fixed switching frequency of 260kHz, delivering up to 5A of output current through a single regulated output. It utilizes a TO-263-7 package for surface mount installation. The component supports operation across an extended temperature range from -40°C to +125°C, with a typical quiescent current of 4.2mA.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification for high efficiency in step-down applications
• Adjustable output voltage capability via external resistor network
• Built-in frequency synchronization pin for multi-module systems
• Comprehensive protection including thermal shutdown and current limit

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Industrial control power supplies
• Telecommunications equipment power distribution
• Automotive electronics power management

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the exact suffix configuration against the manufacturer datasheet to ensure compatibility with specific thermal or electrical requirements. Confirm that the TO-263-7 package variant matches your PCB footprint and thermal design constraints. Cross-reference the revision history for any updates to recommended external component values or application circuit layouts prior to finalizing procurement specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this regulator when a robust 5A buck converter solution is required with adjustable output flexibility. Ensure the input voltage remains within the 4.5V to 40V operational window. Consider the 260kHz switching frequency for balancing component size and efficiency. Verify that the thermal performance of the TO-263-7 package meets the system's heat dissipation needs under maximum load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2677 family of SIMPLE SWITCHER regulators, designed for high-efficiency DC/DC conversion. It complements other variants like the LM2677S-12/NOPB which offer fixed outputs. The series is characterized by integrated power switches and control logic, simplifying design implementation compared to discrete solutions while maintaining reliability in demanding environments.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers include LM2677S-ADJ/NOPB.