L7805CDT

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The L7805CDT is a member of STMicroelectronics\' wide range of linear voltage regulators. Developed as an inexpensive and easy-to-use solution for regulating voltage it is used in a variety of applications, from powering microcontrollers, to simple to moderate analogue circuits. Its working principle is fairly simple, and it is comprised of basic components.

The L7805CDT operates on the fundamental principle of using a voltage reference. This voltage reference can be derived from several potential sources, including Zener diodes, batteries or pots. A negative feedback loop is created using this reference as the point at which the output voltage should be tracked. As the output reaches the reference voltage, the feedback loop automatically adjusts the drive current in the voltage regulator so that the output voltage remains the same. This process forms the basis on which linear voltage regulation works.

The application fields of the L7805CDT linear voltage regulator is wide and varied; due to its low cost, approximate efficiency rating of 85%, and output possibilities of both positive and negative voltages. This makes it ideal for a range of digital and analogue applications, inlcuding microcontrollers, computing, telephone systems, and even digital audio and video equipment. This versatile component is able to accept input voltages between 6 volts and 25 volts and can provide output voltage ranges between 0.7 volts and 5 volts.

The L7805CDT is an incredibly efficient component and its components are incredibly simple. The operational amplifier can be enabled in the linear voltage regulator with a single 5 volt power supply, and the component itself need on involve an input and output pin, an enable pin, and a bypass capacitor (in some cases). The component also includes an internal compensation network, which provides fast response time and overload protection. Furthermore, the input/output impedance of the component, is also very small, making it suitable for high frequency applications.

The L7805CDT linear voltage regulator can offer some impressive efficiencies, due to its design. The component itself will draw between 150uA and 200uA of current while in operation, depending on the input and output voltages. Coupled with this low amount of power draw, there is a very low amount of external components typically required in order to bring the voltage into regulation.

The L7805CDT linear voltage regulator is a powerful little component that can offer a vast array of applications and can provide some impressive power savings. Its internal structure includes a voltage reference, operational amplifier, and an output circuit, confining the bulk of the components involved in the switching process to a single package. The cost-performance ratio of the component is good, and its versatility makes it a good choice when building voltage regulation circuits.

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