L7805CV Positive Voltage Regulator (5V -1A)

Overview

The L7805CV is a classic, reliable positive voltage regulator that delivers a fixed 5V output with up to 1A of current. It is a staple in electronics, ideal for powering microcontrollers, sensors, and other digital circuits from higher voltage sources like 9V or 12V batteries or adapters. Its simplicity and robustness make it a go-to choice for hobbyists, students, and professionals.

Key Features

• Fixed 5V Output: Provides a stable 5V supply, perfect for logic circuits and microcontrollers.
• Output Current up to 1A: Sufficient for most small to medium projects.
• Internal Thermal Overload Protection: Automatically shuts down if the temperature exceeds safe limits.
• Internal Short-Circuit Protection: Safeguards the regulator and your circuit against output shorts.
• Output Transistor Safe-Area Compensation: Ensures reliable operation under varying load conditions.
• Low Standby Current: Minimizes power wastage.
• Standard TO-220 Package: Easy to mount on heatsinks and breadboards.

Technical Specifications

• Output Voltage: 5V (fixed)
• Output Current: 1A (max)
• Input Voltage Range: 7V to 25V (max 35V with proper heatsinking)
• Dropout Voltage: 2V (typical)
• Line Regulation: 50mV (typical)
• Load Regulation: 100mV (typical)
• Operating Temperature Range: 0°C to +125°C
• Package: TO-220

Applications & Use Cases

• Powering Arduino and other microcontrollers: Convert higher voltage supplies (e.g., 9V battery, 12V adapter) to a stable 5V for your board.
• Sensor power supply: Provide clean 5V to sensors and modules.
• LED strips and small motors: Drive low-power loads that require a regulated 5V.
• Breadboard power supplies: Create a dedicated 5V rail for prototyping.
• Battery-powered projects: Regulate battery voltage to a consistent level.

What's Included

• 1x L7805CV Positive Voltage Regulator

Compatibility

• Works with any circuit requiring a 5V regulated supply, including Arduino UNO, Nano, Mega, Raspberry Pi Pico (as a power source), and many other microcontrollers and sensors.
• Commonly used with 9V batteries, 12V wall adapters, and solar panels.

MOKWN Recommendation

For most low-power electronics projects, the L7805CV is an excellent choice. However, if you need higher efficiency or are working with battery power, consider a switching regulator like the LM2596 or a DC-DC buck converter. For higher current applications (above 1A), look into the LM1084 or a larger heatsink for the L7805CV. Always add input and output capacitors (0.33µF and 0.1µF) for stability.