LM2678T-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678T-5.0 is a SIMPLE SWITCHER high-efficiency step-down DC/DC switching regulator manufactured by Texas Instruments. It operates with an input voltage range of 8V to 40V and provides a fixed 5.0V output at up to 5A load current. The device utilizes pulse width modulation control and features a TO-220-7 through-hole package. It supports a switching frequency of 260kHz, ensuring efficient power conversion with low quiescent current of 4.2mA. The regulator functions within a junction temperature range of -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a low on-resistance DMOS power switch for high efficiency operation
• Includes internal compensation for simplified external component requirements
• Features thermal shutdown protection to safeguard against overheating
• Supports standard buck topology with fixed 5.0V output regulation

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient step-down conversion
• Industrial control systems operating from 12V or 24V buses
• Telecommunications infrastructure power distribution

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'T' indicates the TO-220-7 through-hole package variant distinct from surface-mount versions like 'S' or 'SD'. Confirm the '-5.0' designation ensures a fixed 5.0V output rather than adjustable or other fixed voltages. Check for 'NOPB' suffix if lead-free RoHS compliance is required for your assembly process. Ensure the ordering part number matches the exact pinout and thermal characteristics of the TO-220 form factor.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust through-hole solution is preferred for high-current applications up to 5A. The fixed 5.0V output eliminates the need for external feedback resistors, simplifying design. Consider the TO-220 package's thermal dissipation capabilities for environments without active cooling. Verify that the 8V minimum input voltage aligns with your source supply under all operating conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2678 series of SIMPLE SWITCHER regulators, designed for high-efficiency step-down conversion. The series offers various output voltages and packages, including adjustable versions and surface-mount options. The LM2678T-5.0 specifically targets applications requiring reliable, high-current regulation in a durable through-hole format suitable for industrial and commercial power supplies.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2678T-5.0/NOPB: Identical functional specification with lead-free RoHS compliance. LM2678S-5.0/NOPB: Surface-mount alternative using TO-263 package; requires PCB layout adaptation. LM2678SD-5.0/NOPB: Compact VSON-14 surface-mount option; verify thermal performance differences.