L7805CV vs. L7905CV
What's the Difference?
The L7805CV and L7905CV are both voltage regulators that provide a fixed output voltage of +5V and -5V, respectively. They are commonly used in electronic circuits to regulate the voltage and ensure a stable power supply. The main difference between the two is their output voltage polarity, with the L7805CV providing a positive voltage output and the L7905CV providing a negative voltage output. Both regulators have a maximum output current of 1A and are available in the same TO-220 package, making them easy to use in a variety of applications.
Comparison
| Attribute | L7805CV | L7905CV |
|---|---|---|
| Output Voltage | 5V | -5V |
| Maximum Output Current | 1.5A | 1.5A |
| Input Voltage Range | 7V to 35V | -35V to -7V |
| Package Type | TO-220 | TO-220 |
Further Detail
Introduction
When it comes to voltage regulation, the L7805CV and L7905CV are two popular choices for engineers and hobbyists alike. These voltage regulators are commonly used in electronic circuits to provide a stable voltage output, regardless of fluctuations in the input voltage. While both regulators serve the same basic function, there are some key differences between the two that may make one more suitable for a particular application than the other.
Output Voltage
One of the most obvious differences between the L7805CV and L7905CV is their output voltages. The L7805CV is a positive voltage regulator that provides a fixed output voltage of +5V, making it ideal for applications that require a stable 5V power supply. On the other hand, the L7905CV is a negative voltage regulator that provides a fixed output voltage of -5V. This makes it suitable for applications that require a stable negative voltage supply.
Current Rating
Another important factor to consider when choosing between the L7805CV and L7905CV is their current ratings. The L7805CV has a maximum output current of 1A, while the L7905CV has a maximum output current of -1A. This means that the L7805CV is better suited for applications that require higher current outputs, while the L7905CV is more suitable for low-power applications.
Package Type
Both the L7805CV and L7905CV come in a TO-220 package, which is a popular choice for voltage regulators due to its ease of use and heat dissipation capabilities. However, the pinout of the two regulators is different, so it is important to pay attention to the datasheets when designing a circuit with either of these components. The L7805CV has a standard pinout configuration, while the L7905CV has a reversed pinout configuration.
Temperature Range
One key difference between the L7805CV and L7905CV is their temperature ranges. The L7805CV has a wider operating temperature range of -40°C to 125°C, making it suitable for a variety of environments and applications. On the other hand, the L7905CV has a narrower operating temperature range of -40°C to 85°C, which may limit its use in certain high-temperature applications.
Voltage Dropout
When it comes to voltage dropout, the L7805CV and L7905CV also differ slightly. The L7805CV has a typical dropout voltage of 2V, meaning that the input voltage must be at least 2V higher than the desired output voltage for the regulator to operate properly. The L7905CV, on the other hand, has a typical dropout voltage of 1.5V, making it slightly more efficient in terms of power consumption.
Conclusion
In conclusion, the L7805CV and L7905CV are both reliable voltage regulators that serve similar purposes but have some key differences that may make one more suitable for a particular application than the other. The L7805CV is ideal for applications that require a stable +5V output voltage and higher current ratings, while the L7905CV is better suited for applications that require a stable -5V output voltage and lower power consumption. Ultimately, the choice between the two regulators will depend on the specific requirements of the circuit being designed.
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