LM7806 6V Linear Voltage Regulator 1.5A IC 7806

Specifications

• Output Voltage: 6V DC (Fixed)
• Maximum Output Current: 1.5A (With adequate heatsinking)
• Input Voltage Range: 8V to 25V DC (Minimum 8V required for stable 6V output)
• Package Type: TO-220 (Through-hole)
• Quiescent Current: ~5mA
• Dropout Voltage: 2V (Typical)
• Protection Features: Internal Thermal Overload Protection, Internal Short-Circuit Current Limiting, Output Transistor Safe-Area Compensation.
• Operating Temperature Range: 0°C to +125°C

Applications

• RC & Robotics Power: Providing a dedicated 6V rail for high-torque metal gear servos without pulling power from your microcontroller's 5V rail.
• Vintage Electronics Repair: A direct replacement for 6V regulation stages in classic audio equipment and retro consoles.
• Instrumentation & Audio: Powering low-noise analog circuits that require specifically 6V for optimal operational amplifier (Op-Amp) biasing.
• Automotive DIY: Stepping down 12V car battery power to safely run 6V accessories and sensors.

Unlock New Capabilities

• Past Projects: If you've mastered basic 5V logic circuits using an LM7805 or USB power...
• The Upgrade: The LM7806 unlocks the ability to isolate and drive "noisy" mechanical loads. Microcontrollers (like Arduino/ESP32) hate voltage dips caused by motors. By dedicating an LM7806 to your 6V motors/servos, you protect your logic board from brownouts and resets.
• Effort Level: Beginner. You only need the IC, a basic heatsink, and two small ceramic/electrolytic capacitors to prevent oscillation.

Virtual Technician

• ⚠️ Safety Warning: Linear regulators dissipate excess voltage as HEAT. Dropping 12V down to 6V at 1 Amp means you are dissipating 6 Watts of heat. A heatsink is mandatory for high-current applications.

Pinout Configuration (Front View, Pins Down):

• Pin 1 (Left) - INPUT: Connect your unregulated power source (8V - 25V).
• Pin 2 (Center) - GROUND: Connect to your system's common ground. (Note: The metal tab is also internally connected to Ground).
• Pin 3 (Right) - OUTPUT: Your stable 6V DC output.

Package Includes:

• 1 x  LM7806 6V Linear Voltage Regulator 1.5A IC 7806

Frequently Asked Questions (FAQ)

• What is the LM7806 used for?
  It is used to step down an unregulated higher DC voltage to a stable, fixed 6V DC output.
• What is the maximum current the LM7806 can provide?
  It can provide up to 1.5A, provided it has proper heat dissipation (a heatsink).
• What is the minimum input voltage for the LM7806?
  It requires at least 8V input to maintain a stable 6V output due to its 2V dropout voltage.
• What is the maximum input voltage?
  The absolute maximum is generally 25V to 35V depending on the manufacturer, but keeping it below 15V is recommended to reduce extreme heat generation.
• Do I need to use a heatsink with the LM7806?
  Yes, if you are dropping a large amount of voltage or drawing more than 200mA of current, a heatsink is required to prevent thermal shutdown.
• What happens if the LM7806 gets too hot?
  It features internal thermal shutdown protection; it will temporarily turn off the output to prevent destroying itself until it cools down.
• Can I use the LM7806 to charge a 6V battery?
  No, a linear voltage regulator is not a smart battery charger. It lacks constant-current and float-charge logic needed for safe battery charging.
• Why is my LM7806 outputting less than 6V?
  Your input voltage might be dropping below 8V under load, or the IC might be in thermal shutdown due to overheating.
• Are capacitors really necessary on the input and output?
  Yes, bypassing capacitors (typically 0.33µF on input and 0.1µF on output) are required to prevent high-frequency oscillation and ensure stable output.
• Is the metal tab on the back electrically isolated?
  No, the metal tab on the TO-220 package is internally connected to the Ground pin (Pin 2).
• Can I wire two LM7806 regulators in parallel for 3A output?
  No, this is not recommended. Slight manufacturing differences will cause one regulator to take the entire load and overheat. Use a high-current switching regulator instead.
• Can the LM7806 step up a 5V input to 6V?
  No, it is strictly a "step-down" (buck) linear regulator. You need a boost converter for that.
• What is the difference between LM7806 and LM7805?
  The only difference is the fixed output voltage. The 7806 outputs 6V, while the 7805 outputs 5V.
• Can I use this for my RC car steering servo?
  Yes, providing a dedicated 6V supply via a 7806 is a very common way to run 6V servos optimally.

   

• Does the LM7806 have short-circuit protection?
  Yes, it has internal short-circuit current limiting to protect the device from temporary output shorts.
• How do I calculate the heat generated by the LM7806?
  Heat (Watts) = (Input Voltage - 6V) x Output Current (Amps).