L7805CV Linear Voltage Regulator
$0.69
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Fixed 5V regulation in a through-hole TO-220 package. L7805CV is a three-terminal positive linear voltage regulator for making a stable 5V rail from a higher DC input in printer electronics, control panels, breadboards, and small repair projects.
Why use this part
- Simple 5V rail: fixed positive regulator output, no trim pot or switching noise to tune.
- TO-220 package: easy to solder, breadboard, bolt down, or heat-sink when the load current and voltage drop demand it.
- Built-in protection: the ST L78 datasheet specifies internal current limiting, thermal shutdown, and safe-area protection.
Specifications
- Part number: L7805CV
- Regulator type: positive fixed linear voltage regulator
- Output voltage: 5V nominal
- Output current: up to 1.5A, subject to heat sinking and power dissipation
- Package: TO-220 / TO-220AB, 3 lead
- Input voltage: L78 datasheet rates the 5V family up to 35V DC absolute maximum; design with thermal margin.
- Typical dropout: about 2V at 1A in the ST L78 datasheet, so it needs input headroom above 5V.
Intended use
- Creating a local 5V logic rail from a higher DC supply.
- Small controller, sensor, LED, relay, breadboard, and repair circuits.
- Printer electronics projects where a quiet, simple linear regulator is preferred over a buck converter.
Gotchas
- This is not an efficient buck converter. The voltage drop times load current turns into heat.
- At higher current, use a proper heat sink and check the power dissipation before putting it in an enclosed printer bay.
- This is a component IC, not a wired plug-and-play 5V power supply.
