LM2677SDX-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677SDX-ADJ is a SIMPLE SWITCHER® high-efficiency 5A step-down DC/DC converter from Texas Instruments. It operates with an input voltage range of 8V to 40V and provides an adjustable output voltage. The device integrates a 0.5A, 60V rated switch and features a fixed switching frequency of 260kHz. It utilizes the TO-263 (D2PAK) package for thermal performance. Key electrical parameters include a maximum output current of 5A, minimum input voltage of 8V, maximum input voltage of 40V, and an operating temperature range from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 0.5A, 60V rated power switch for simplified design
• Fixed 260kHz switching frequency allows use of small inductors and capacitors
• Enables remote sense operation for accurate load regulation
• Includes internal frequency compensation for minimal external component count

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for industrial equipment
• Battery-powered systems requiring efficient step-down conversion
• Distributed power architectures in telecommunications
• High-current applications with moderate input voltage ranges

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'SDX' confirms the surface-mount D2PAK-7 package and tape-and-reel packaging format. Confirm the 'ADJ' designation indicates the adjustable output version rather than a fixed voltage variant. Ensure compatibility with RoHS directives if required by your manufacturing standards. Cross-reference the manufacturer part number against official TI databases to confirm current production status and availability.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a high-current 5A buck converter is needed with an input voltage up to 40V. The adjustable output feature provides flexibility for various system voltage requirements. Consider the thermal performance of the D2PAK package for heat dissipation needs. Ensure the application benefits from the fixed 260kHz frequency for component size optimization compared to higher-frequency alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM267x family of SIMPLE SWITCHER regulators, designed for high-efficiency step-down conversion. The LM2677 specifically targets 5A output currents, distinguishing it from lower-current variants like the LM2676 (3A). It represents a mature technology line from Texas Instruments, offering a balance of performance, ease of design, and cost-effectiveness for general-purpose power management applications.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements may include other LM2677 variants with different packages or output configurations, such as LM2677S-ADJ/NOPB. Verify pinout compatibility and thermal characteristics when substituting. Check for updated versions with NOPB suffixes indicating lead-free and RoHS compliance.