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7808 Voltage Regulator IC

Specification	Details
Output Voltage	+8V DC
Output Current	Up to 1.5A
Input Voltage (Max)	35V DC
Dropout Voltage	2.0V (Typical)
Package Type	TO-220
Protection Features	Internal Thermal Overload & Short Circuit Protection

Price

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₹ 12.71

(Tax included)

Product Description

The 7808 Voltage Regulator IC is a high-performance linear regulator designed to provide a rock-solid, fixed 8V DC output. Part of the legendary 78xx series, this IC is the industry standard for transforming fluctuating or higher-level DC voltages into a clean 8V supply. It is widely used in automotive electronics, telecommunications equipment, and DIY robotics projects where an 8V rail is required for specialized sensors or motor drivers. Housed in the rugged TO-220 package, the 7808 features internal current limiting and thermal shutdown, making it nearly "indestructible" under normal operating conditions when paired with an adequate heatsink.

Key Features

Fixed 8V Regulation: Delivers a consistent +8V output, ideal for powering 7.4V Li-ion battery-compatible devices or 8V logic circuits.
High Output Current: Capable of delivering up to 1.5A, sufficient for driving multiple microcontrollers and small actuators simultaneously.
Built-in Safety: Integrated thermal overload protection and short-circuit current limiting safeguard the IC and your downstream components.
Excellent Ripple Rejection: Effectively filters out AC noise from power transformers, providing a smooth DC signal for sensitive analog sensors.
Easy Implementation: Requires only two external capacitors for stable operation, making it perfect for rapid prototyping on breadboards.

Technical Details

Operating Temperature: 0°C to +125°C.
Storage Temperature: -65°C to +150°C.
Pin Configuration: 1: Input, 2: Ground, 3: Output.

Prototyping and Engineering Tips from Robogears

The "Voltage Gap" Rule: CRITICAL: For the 7808 to regulate properly, the input voltage must be at least 2V higher than the output (the "Dropout Voltage"). For an 8V output, ensure your input is at least 10V DC. However, avoid inputs higher than 15V-18V if drawing high current, as the excess voltage will be converted into heat.
Capacitor Setup: For maximum stability, place a 0.33µF Ceramic Capacitor on the input pin and a 0.1µF Ceramic Capacitor on the output pin. For high-current loads, adding a 100µF Electrolytic Capacitor in parallel on the input will help manage sudden current spikes.
Heatsink is Mandatory: If you are dropping 12V to 8V at 1A, the IC must dissipate 4W of heat. Without a TO-220 Aluminum Heatsink, the IC will reach its thermal limit and shut down the output within seconds. Always use thermal paste for the best heat transfer.
Common Grounding: Ensure Pin 2 (Ground) is connected to a solid, low-impedance ground plane. In high-power circuits, a "noisy" ground can cause the output voltage to fluctuate or oscillate.
Reverse Polarity Protection: Linear regulators are sensitive to reverse voltage. If there is a chance of the battery being connected backward, place a 1N4007 Diode in series with the input to protect the IC from instant failure.

Package Includes

1 x 7808 Voltage Regulator IC (TO-220)

Disclaimer: Product images are shown for illustrative purposes only. The exact branding placement on the metal tab or the finish of the plastic housing may vary slightly between manufacturing batches, but all technical specifications and performance standards remain as described.

Safety Warning: Always verify the pinout before soldering. Ensure the input voltage does not exceed the 35V maximum limit. When using a metal chassis, remember that the metal tab of the 7808 is internally connected to the Ground pin (Pin 2). Avoid accidental shorts between the tab and other power rails.