MC79M15BDT

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The MC79M15BDT is a very useful utility device, specifically in the field of Linear Voltage Regulators (PMICs). Utilizing advanced circuitry, discrete components, and detailed specifications for its design, it offers numerous applications for professionals who require advanced power regulation. In this article, we discuss the application field and working principle of the MC79M15BDT.

Introduction

The MC79M15BDT is a three terminal adjustable Linear Voltage Regulator. It can operate over a wide input voltage range from 3.3 V to 25 V, and its output voltage can be adjusted between 1.5 V and 20 V. As such, it is excellent for applications that require a precision and high current power-supply.

Applications

The MC79M15BDT is an ideal voltage regulator for numerous applications, especially in automotive and industrial systems. Its wide input voltage range and output stability make it suitable for electric vehicles, HVAC systems, electric meters, and more. Additionally, its small size and current capacity make it well suited for compact applications such as portable electronics, electric toys and medical equipment.

The MC79M15BDT also has built in protection features, such as error trapping and current limiting. These add an extra layer of safety and make it suitable for use in sensitive systems. Therefor, it is often used in mission-critical systems requiring reliable, high accuracy power regulation.

Design Benefits & Working Principle

The MC79M15BDT also offers a number of design benefits. It requires only four external components for operation and is adjustable with an external resistor, allowing designers to tailor the output voltage to their specific needs. It has low dropout voltage and only requires 300 mV of input voltage above the set output voltage to function effectively. Additionally, the regulator has over current protection and thermal shutdown, which prevents damage to components and extends the device’s lifetime.

Internally, the MC79M15BDT features an error amplifier, an oscillator, a control circuit, a P-channel MOSFET, and a current sense circuit. The oscillator determines the PWM switching frequency, which is typically between 200 kHz and 400 kHz. The error amplifier then compares the output voltage to a reference voltage and adjusts the duty cycle of the PWM accordingly. The duty cycle is then passed to the drive stage, which controls the current through the output.

The current sense circuit monitors the current that flows through the output and sends the signal to the control circuit. Based on the current levels, the control circuit will adjust the duty cycle accordingly. If the current flow is too high, the control circuit will activate the reduce duty cycle. Additionally, the current flow is limited by the P-channel MOSFET, to ensure that it does not exceed the maximum current specified for the device.

Overall, the MC79M15BDT is an excellent choice for a wide range of voltage regulation applications. Its combination of robust features, high performance, and design flexibility make it an ideal choice for advanced operation and high reliability.

Conclusion

In conclusion, the MC79M15BDT is an excellent choice for high performance, high reliability voltage regulation. Its wide input voltage range, adjustable output voltage, and built in protection features make it suitable for a variety of applications, such as automotive, industrial, portable electronics, and mission-critical systems. Furthermore, its slim design and P-channel MOSFET ensure current limitations and safety, which is invaluable for sensitive systems. In short, the MC79M15BDT is a great choice for both professional and hobbyist applications requiring precision power regulation.

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