The Linear Voltage Regulator “L7805CV” is a versatile integrated circuit designed to provide a stable and regulated +5V output voltage. Whether you are working on a microcontroller project or building digital logic circuits, the L7805CV can be an essential component in your power supply design. In this blog, we will explore the features, advantages, disadvantages, and more about the L7805CV, giving you a comprehensive guide.
What is L7805CV?
L7805CV is a linear voltage regulator IC (integrated circuit) that provides a constant regulated output voltage of +5V. It is part of the 78xx series of voltage regulators, specifically designed to regulate and maintain a stable voltage output.
What is L7805CV used for?
L7805CV is commonly used for voltage regulation in electronic circuits. It is particularly useful when a stable +5V power supply is required, such as in microcontrollers, digital logic circuits, and various low-power electronic devices.
Features
Features of L7805CV include:
- Regulated Output Voltage: L7805CV ensures a constant output voltage of +5V.
- Wide Input Voltage Range: It can handle input voltages ranging from 7V to 35V, making it suitable for various power supply applications.
- Low Dropout Voltage: The dropout voltage is the minimum voltage difference between the input and output at which the regulator can maintain a stable output. L7805CV has a low dropout voltage, allowing it to regulate effectively even with small input-output voltage differences.
- Internal Thermal Overload Protection: It includes built-in protection mechanisms to prevent damage from excessive heat or current, ensuring the safe operation of the IC.
- Short Circuit Protection: L7805CV has built-in circuitry to protect against short circuits, safeguarding both the regulator and the connected circuitry.
- High Current Capability: It can deliver a maximum output current of up to 1.5A, making it suitable for powering a range of electronic components.
Advantages and Disadvantage
Advantages of L7805CV:
- Easy to use and implement in various electronic circuits.
- Provides a stable and regulated +5V output voltage.
- Wide input voltage range allows for flexibility in power supply options.
- Internal protection features ensure safe operation and prevent damage from thermal overload and short circuits.
- High current capability makes it suitable for powering a variety of components.
Disadvantages of L7805CV:
- Linear voltage regulators, like L7805CV, dissipate excess energy as heat. This can be inefficient in applications where power dissipation is a concern.
- Limited output voltage options, as L7805CV provides a fixed +5V output.
L7805CV ECAD Model
PCB symbol and Footprint
Datasheet
You can click here to learn more details about the linear voltage regulator!
Compare L7805CV With Other Models
L7805CV vs LM317
The L7805CV is a fixed output voltage regulator that delivers a constant +5V output. It is mainly used when a stable +5V power supply is required in various applications. On the other hand, the LM317 is an adjustable voltage regulator capable of generating variable output voltages based on external resistors connected to its adjustment pin. This flexibility makes the LM317 ideal for designs requiring different output voltage levels.
L7805CV vs LM7805
The LM7805 is very similar to the L7805CV as it also provides a fixed +5V output voltage. In fact, the primary difference lies in the package type. The L7805CV comes in a TO-220 package, which is commonly used for higher power applications, while the LM7805 is available in the TO-220 and TO-92 packages.
Functionally, both ICs perform the same task of regulating voltage, so the choice between them depends on factors such as space constraints and power requirements.
L7805CV vs L7905
The L7805CV and L7905 are known as a complementary pair since they are designed to work together. The L7805CV regulates positive voltage (+5V output), while the L7905 regulates negative voltage (-5V output). These regulators are frequently employed in dual power supply configurations where both positive and negative voltages are needed simultaneously. This pairing ensures symmetric regulation and stability in the circuit.
L7805CV vs L7806
The L7806 is very similar to the L7805CV, but with one significant difference: the output voltage. While the L7805CV provides a +5V output, the L7806 delivers a regulated +6V output. This slight variation in output voltage can be crucial in applications that require specific voltage levels.
FAQs
What is the maximum input voltage of L7805CV?
The L7805CV has a maximum input voltage rating of 35V. It is important to note that the input voltage should not exceed this value to prevent damage to the regulator.
What is the temperature of L7805CV?
The L7805CV has an operating temperature range from 0°C to 125°C. It is recommended to stay within this temperature range for proper and reliable operation.
Conclusion
L7805CV linear voltage regulator is a reliable and widely used component for achieving a stable +5V output voltage in electronic circuits. Its easy implementation, internal protection mechanisms, and high current capability make it a preferred choice for many low-power applications. However, it’s important to consider the limitations, such as heat dissipation and fixed output voltage, when incorporating the L7805CV into your designs.
