DC/DC Switching Regulator Texas Instruments LM2678T-5.0/NOPB — PMIC in TO-220-7

The LM2678T-5.0 is a DC/DC switching regulator from Texas Instruments that delivers a fixed 5.0 V output in a TO-220-7 through-hole package. Designed for board-level power management, this single-output regulator provides a compact solution for converting higher input voltages to a stable 5 V rail. The device integrates switching control and protection features appropriate for powering digital and analog circuits in embedded systems, industrial control equipment, and power modules where a reliable 5 V supply is required.

Advantages

The regulator offers efficient step-down conversion with a fixed 5.0 V output, reducing the need for external reference circuitry. Its TO-220-7 package simplifies thermal management and mounting on through-hole PCBs. Integrated switching control reduces component count on the board, and the part is suitable for applications that require a compact, robust power management IC with straightforward implementation.

Suitable for

• Embedded systems requiring a stable 5 V supply
• Industrial control modules and automation equipment
• Power modules and converters for board-level power distribution
• Prototyping and designs where through-hole mounting is preferred

Key specifications

• Output voltage: fixed 5.0 V
• Regulator type: step-down (buck) switching regulator
• Package: TO-220-7 through-hole
• Output configuration: single output
• Intended use: board-level power management for digital and analog circuits

How to use

Integrate the device on a PCB using standard through-hole soldering techniques for the TO-220-7 package, observing recommended land pattern and clearance for heat dissipation. Provide appropriate input and output decoupling capacitors and the inductor and diode components specified by the manufacturer's application guidance to ensure stable operation and low ripple. Follow the device’s thermal and layout recommendations to maintain reliable performance under expected load and ambient conditions.

Recommendations

Verify input voltage range and ensure adequate heat sinking or airflow when operating near the device’s maximum power dissipation. Use recommended external components and layout practices from the manufacturer’s datasheet to achieve the specified regulation, efficiency, and transient response.