L7805 5V Voltage Regulator – TO-220

The L7805 is a three-terminal positive voltage regulator that provides a fixed 5V output from a suitable higher DC input voltage. It is useful for powering electronic circuits that require a regulated 5V supply.

For classroom projects, the L7805 helps students explore voltage regulation, power supplies and heat management. Its TO-220 package is convenient for soldered circuit assembly and fitting a heatsink.

Key Features

• Fixed 5V output: provides a regulated supply for compatible electronic circuits.
• Output current up to 1.5A: subject to adequate heatsinking and suitable operating conditions.
• Thermal overload protection: shuts down the regulator if it becomes too hot.
• Internal current limiting and short-circuit protection: help protect the device during fault conditions.
• Safe operating area protection: helps protect the output transistor.
• TO-220 package: three-terminal construction with a mounting tab for heatsinking.

What’s Included

• 1 × L7805 5V voltage regulator in a TO-220 package.

Classroom Applications

Suitable for student-built regulated power supplies and electronic projects requiring 5V. Students can measure input and output voltages, investigate regulation and observe how load current affects heat generation.

The regulator requires an input voltage sufficiently above 5V to maintain regulation. Use the manufacturer’s recommended capacitors and provide a suitable heatsink where required.

Curriculum Connections

Supports practical investigations into power supplies, electrical systems and energy efficiency in Australian secondary Design and Technologies, Victorian Systems Engineering and NSW Technology classrooms.