MIC5321-OFYMT-TR

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MIC5321-OFYMT-TR Application Field and Working Principle

The MIC5321-OFYMT-TR is a low-dropout linear regulator designed specifically for high current step-down applications. It uses a PNP-based design and can provide up to 1.5A of current with a voltage drop less than 185mV. The regulator provides extremely low noise operation, with a typical power supply rejection ratio (PSRR) of 80dB. It also features short-circuit protection, over-temperature, and current limit protection via an active current foldback. The MIC5321-OFYMT-TR can be used in a variety of applications, ranging from battery-powered consumer electronics, to automotive power supply systems.

Working Principle

The MIC5321-OFYMT-TR is a current-regulated linear regulator, using an internal reference voltage to regulate the output voltage. The device requires an input voltage that is higher than the output voltage, plus the voltage drop of the regulator. When the load current increases, the voltage across the regulator changes, causing the regulator to adjust the internal current source to maintain regulation. As the load current decreases, the output voltage will rise resulting in less voltage drop. This helps maintain regulation while keeping the voltage across the regulator low and increasing the efficiency of the regulator.

For circuits that draw high current and require low voltage, the MIC5321-OFYMT-TR offers a wide range of options. It can be used in systems that range from 5V to 19V, with an input voltage range of 4V to 27V. The output voltage accuracy is high enough to provide a stable output voltage under fluctuating load conditions. The current limit and short-circuit protection ensure the device will not be damaged if the system draws more current than the regulator can handle. Additionally, the device features thermal shutdown protection to protect the IC from over-temperature conditions.

In conclusion, the MIC5321-OFYMT-TR is a great choice for applications that require high current and low voltage. Its high power supply rejection ratio, low voltage drop, current limit protection, and other features make it an extremely robust and reliable power supply solution.

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