DC/DC Switching Regulator Texas Instruments LM2576HVT-15/NOPB, TO-220-5, 15V Output

The LM2576HVT-15 is a Texas Instruments DC/DC switching regulator in a TO-220-5 package that provides a fixed 15 V output. Designed for step-down (buck) voltage regulation, this regulator is intended for board-level power modules, embedded systems and industrial control circuits that require a steady 15 V rail. The device integrates a high-efficiency switching element and internal circuitry to simplify external component count and board layout while delivering regulated output under varying load conditions.

Advantages

The regulator delivers fixed 15 V output with efficient step-down conversion, reducing heat dissipation compared with linear regulators. Its TO-220-5 package offers a compact through-hole form factor with thermal capability suitable for moderate power applications. Internal protection features and simplified external component requirements make it straightforward to implement on replacement or new power supply designs.

Suitable for

• Board-level power modules and embedded systems requiring a 15 V rail
• Industrial controllers, automation equipment and instrumentation
• Repair and refurbishment of power supplies where a compact switching regulator is needed
• Power conversion in battery-powered or mains-powered devices with step-down requirements

Key specifications

• Topology: Step-down (buck) switching regulator
• Output voltage: Fixed 15 V
• Package type: TO-220-5 through-hole package
• Intended use: DC/DC voltage regulation for board- and system-level power rails
• Typical applications: Embedded systems, industrial control, power supply replacement

How to use

Mount the TO-220-5 package on the PCB with appropriate heat-sinking or copper area to manage thermal dissipation. Follow the manufacturer’s recommended external components for inductance, capacitor values and diode selection to ensure stable operation and low output ripple. Apply an input voltage that exceeds the required output plus the regulator’s dropout headroom and verify polarity. After assembly, verify output voltage under expected load conditions and adjust surrounding circuit design for transient and filtering requirements.

Recommendations

Use low-ESR output capacitors and an appropriately rated inductor to achieve stable regulation and low noise. Ensure adequate cooling for continuous high-current operation and follow PCB layout guidelines to minimize switching noise. Verify component ratings for operating voltage and current margins in industrial or repair applications.