MC79M05BDT

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MC79M05BDT Application Field and Working Principle
The MC79M05BDT is a three-terminal negative voltage regulator designed for use in various applications. The device is a monolithic integrated circuit, featuring low dropout and low quiescent current, great for use in a wide range of applications. Its applications include microprocessor-based systems, industrial computers, automotive and automotive-related equipment, as well as other applications where power supply stability is needed.

The MC79M05BDT is a fixed voltage regulator with an output voltage of -5V. It has a total output current of 100mA, with an input voltage of at least 2V higher than its output voltage. It also features a low dropout of 300mV at 100mA of load current. The maximum junction temperature is 125°C, with an operating temperature range of -40°C to +125°C.

The MC79M05BDT features an internal current limiting and thermal shutdown, ensuring safe operations and providing over-temperature protection. It also has an output voltage tolerance of ±2%. The device is available in a PDIP-8, SOP-8, and TO-220 package.

The working principle of the MC79M05BDT is based on the concept of an adjustable current source. The output voltage is determined by the two resistors connected to the amplifier, connected to the adjustment terminal. By varying the current through the resistors, the voltage across them can be adjusted, thus resulting in the above mentioned output voltage. To maintain the stability of the output voltage, loop compensation circuitry is used. The voltage reference circuit consists of an unstable NPN transistor, which is operated at a very low current and is also temperature compensated.

The MC79M05BDT utilizes three main components in its working principle. The first is the voltage reference circuit, which comprises of an NPN transistor, operated at a very low current and temperature compensated. The second is the amplifier, which amplifies the input signal and is connected to the adjust terminal, used to vary the current through the resistor and determine the output voltage. The third is the loop compensation circuitry, which is used to maintain output stability by limiting the bandwidth and reducing the loop gain.

The MC79M05BDT is an effective and efficient three-terminal negative voltage regulator, featuring low dropout, low quiescent current, an adjustable current source, and is available in multiple packages. Its built-in features include an internal current limiting and thermal shutdown, ensuring safe operation and providing over-temperature protection. This device is great for a wide range of application, such as microprocessor-based systems, industrial computers, automotive and automotive-related equipment, as well as other applications where power supply stability is needed.

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