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MC7809BT from ON,ON Semiconductor

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MC7809BT

Manufacturer: ON, MOT, MOTO

1A, 9V, Positive Voltage Regulator

Partnumber Manufacturer Quantity Availability
MC7809BT ON, MOT, MOTO 197 In Stock

Description and Introduction

1A, 9V, Positive Voltage Regulator # **MC7809BT: A Reliable 9V Voltage Regulator for Your Electronic Projects**  

When it comes to stable and efficient voltage regulation, the **MC7809BT** stands out as a dependable choice for engineers, hobbyists, and professionals alike. This linear voltage regulator is designed to deliver a fixed **9V DC output** with high accuracy, making it an essential component in a wide range of electronic applications.  

## **Key Features of the MC7809BT**  

The MC7809BT is part of the **78xx series** of voltage regulators, known for their robustness and ease of use. Here are some of its standout features:  

- **Fixed 9V Output:** Provides a stable 9V DC output, eliminating the need for additional circuitry to maintain voltage consistency.  
- **High Current Capacity:** Capable of delivering up to **1A of continuous current**, making it suitable for powering medium-load circuits.  
- **Thermal Overload Protection:** Built-in safeguards prevent damage from excessive heat, ensuring long-term reliability.  
- **Short-Circuit Protection:** Automatically limits current in case of a short circuit, protecting both the regulator and connected components.  
- **Wide Input Voltage Range:** Operates efficiently with input voltages ranging from **11V to 35V**, accommodating various power supply conditions.  
- **Low Dropout Voltage:** Ensures stable performance even when the input voltage is only slightly higher than the output.  

## **Applications of the MC7809BT**  

Thanks to its versatility, the MC7809BT is widely used in both industrial and consumer electronics. Some common applications include:  

- **Power Supplies:** Ideal for converting higher DC voltages to a stable 9V output in benchtop power supplies and battery chargers.  
- **Embedded Systems:** Provides reliable power to microcontrollers, sensors, and other low-voltage digital circuits.  
- **Audio Equipment:** Ensures consistent voltage for amplifiers, mixers, and other audio devices that require clean power.  
- **Automotive Electronics:** Used in vehicle systems where stable voltage regulation is crucial despite fluctuating input from the battery.  
- **DIY Projects:** A favorite among hobbyists for powering breadboard circuits, LED displays, and small robotics projects.  

## **Why Choose the MC7809BT?**  

The MC7809BT is a tried-and-tested solution for voltage regulation, offering a balance of performance, durability, and cost-effectiveness. Its **TO-220 package** allows for easy mounting on heat sinks when handling higher currents, ensuring optimal thermal management.  

For engineers and designers seeking a no-fuss, high-performance voltage regulator, the MC7809BT delivers consistent results with minimal external components required. Whether in prototyping or production, this component remains a reliable workhorse for maintaining steady power in electronic systems.  

If your project demands a stable 9V supply, the MC7809BT is a proven choice that won’t disappoint. Its combination of protection features, efficiency, and ease of integration makes it a staple in power management solutions across industries.

Application Scenarios & Design Considerations

1A, 9V, Positive Voltage Regulator

Alternative Part Number

  • L7809CV --: Widely available 9V positive linear regulator in TO-220, pin-compatible with MC7809BT and a common drop-in replacement.
  • LM7809CT --: Standard 9V fixed linear regulator in TO-220 with equivalent electrical characteristics and pinout.
  • UA7809CKCS --: 9V positive voltage regulator in TO-220 package, functionally equivalent to the MC7809BT with similar current and thermal ratings.
  • KA7809 --: Equivalent 9V positive voltage regulator in TO-220, same pin configuration and electrical characteristics.

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