Name: Generic LM7809 Voltage Regulator IC - Fixed 9V Output (1A)
Brand: Generic
SKU: OL-GEN-7809VRIC
Price: 45.00 INR
Availability: InStock

Robust 9V Stability

Delivers consistent and clean 9-volt power, essential for sensitive digital and analog circuitry.

Integrated Safeguards

Built-in thermal and short-circuit protection ensures maximum reliability and component longevity always.

Simple Integration

Minimal external component requirements make this regulator ideal for quick and easy project deployment.

The Engineering Behind LM7809 Voltage Regulator IC

The LM7809 is a quintessential positive linear voltage regulator, meticulously engineered to provide a stable +9V output from an unregulated DC input. Its monolithic integrated circuit design incorporates overcurrent and thermal shutdown protection, making it a robust solution for power supply applications. This IC effectively dissipates excess voltage as heat, ensuring a constant and clean power rail for sensitive electronic components.

Fabricated with high-grade semiconductor materials, the 7809 series is renowned for its operational longevity and resilience under varying load conditions. Its TO-220 package offers excellent thermal dissipation characteristics, crucial for maintaining optimal performance and extending component lifespan in demanding environments, whether for industrial control systems or educational prototypes.

Precision Fixed 9V Output

At its core, the LM7809 is designed to deliver a highly accurate and unwavering 9-volt DC output. This fixed voltage regulation eliminates ripple and noise from the input supply, providing a clean power source critical for microcontrollers, sensors, and other digital or analog circuitry that demand precise voltage levels for stable operation and preventing component damage due.

Integrated Protection Mechanisms

Beyond its primary regulation function, the LM7809 incorporates robust internal protection. These include short-circuit current limiting, which prevents excessive current draw during fault conditions, and thermal overload protection, which automatically shuts down the device if its junction temperature exceeds safe operating limits. These integrated safeguards significantly enhance the reliability and durability of the regulator, minimizing potential system failures.

Optimized for Performance & Integration

Output Voltage: +9V DC Fixed
Input Voltage Range: 11V to 25V DC (typically 11-20V recommended for efficiency)
Output Current: Up to 1A (with adequate heatsinking)
Dropout Voltage: Approximately 2V
Package Type: TO-220 (Through-hole)
Internal Protection: Thermal Overload & Short Circuit
Quiescent Current: ~8 mA
Output Tolerance: ±4% typical

Features & Benefits

Fixed 9V Output: Provides a highly stable and reliable power source for sensitive electronics.
1A Output Current: Capable of supplying sufficient current for a wide range of common circuits.
Thermal Overload Protection: Automatically shuts down to prevent damage from excessive heat, ensuring longevity.
Short Circuit Protection: Limits output current during faults, safeguarding both the regulator and connected components.
TO-220 Package: Facilitates easy heatsink attachment for enhanced thermal management in high-current applications.
Ease of Use: Requires minimal external components (typically two capacitors) for operation, simplifying circuit design.

Pro-Grade Advantages

Highly stable and precise 9V fixed output voltage.
Robust internal thermal and short-circuit protection.
Widely available and cost-effective solution for power regulation.
Simple circuit implementation with minimal external components.

Technical Considerations

Linear regulation generates heat, requiring heatsinking at higher current draws.
Inefficient for large voltage differentials; input voltage must be sufficiently higher than output.

What is the primary function of an LM7809 voltage regulator?

The LM7809 is a positive linear voltage regulator designed to provide a stable, fixed +9V DC output from a higher, unregulated DC input voltage.

What is the typical input voltage range for the LM7809?

For optimal performance and regulation, the LM7809 typically requires an input voltage between 11V and 25V, with a minimum of 2V above the output.

Does the LM7809 require a heatsink?

Yes, a heatsink is strongly recommended, especially when the output current exceeds a few hundred milliamperes or when there is a significant voltage difference between input and output, to dissipate excess heat.

What protective features are integrated into the LM7809?

The LM7809 includes internal thermal overload protection, which shuts down the device if it gets too hot, and short-circuit current limiting to prevent damage during output shorts.

Can the LM7809 provide more than 1A of current?

While rated for up to 1A with proper heatsinking, exceeding this limit without sufficient thermal management or parallelization can lead to thermal shutdown or damage.

What external components are typically needed for an LM7809?

Generally, two capacitors are recommended: one (e.g., 0.33µF) on the input for stability and one (e.g., 0.1µF) on the output to improve transient response.

Specification	Value
Output Voltage (Vout)	+9V DC
Input Voltage Range (Vin)	11V – 25V DC
Maximum Output Current (Iout)	1A
Dropout Voltage	2V (typical)
Quiescent Current (Iq)	~8 mA
Line Regulation (typ.)	2 mV
Load Regulation (typ.)	5 mV
Operating Junction Temperature Range	0°C to +125°C
Package Type	TO-220 (3-pin)
Internal Protection	Thermal Overload, Short Circuit
Recommended Input Capacitor	0.33µF (ceramic)
Recommended Output Capacitor	0.1µF (ceramic)

Additional information

Weight	0.002 kg
Dimensions	1.52 × 1.02 × 0.46 cm
Brand	Generic
Technology	Linear Voltage Regulator
Operating Voltage	9V (Output)
Max Current	1A
Package	TO-220
Control Voltage	11V-25V (Input)