ISL78302AARGCZ

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The ISL78302AARGCZ is a linear voltage regulator integrated circuit designed for a wide variety of applications. It is designed to deliver high accuracy and excellent power supply rejection ratio (PSRR) for low voltage applications.

This regulator combines a high level of accuracy and excellent thermal stability with a programmable voltage output and current limit. The output voltage can be easily set with a single external resistor, allowing for easy and precise adjustment. The ISL78302AARGCZ also features a current limit and short-circuit protection in order to protect the system against excessive loads.

Application Field

The ISL78302AARGCZ is designed for a wide range of applications needing a low-voltage regulator. Examples include automotive applications for sensors, audio amplifiers, fuel injectors and ECUs; industrial applications for DSPs, LED drivers, regulators, and embedded systems; and consumer electronics for audio toys, MP3 players, and power management chips. It is well suited for battery-powered applications due to its low quiescent current.

Working Principle

The ISL78302AARGCZ linear voltage regulator IC consists of a voltage divider, a P-channel MOSFET, an amplifier, and a voltage output terminal. The voltage divider receives the input voltage and provides the reference voltage for the remainder of the IC. The MOSFET will be activated and controlled by the amplifier, which compares the input voltage at the reference terminal with the reference voltage generated by the voltage divider. If the difference between these two is more than a preset value, the MOSFET is activated and pulls the voltage output terminal to the reference voltage level. This ensures a stable and constant output voltage.

The current limit of the ISL78302AARGCZ is programmed with the reference voltage generated from the voltage divider and the input voltage, which is fed to the amplifier. If the current drawn from the output exceeds the programmed current limit, the amplifier will shut down the output. This prevents excessive current from damaging the circuit or the power source.

The ISL78302AARGCZ features excellent thermal stability, which ensures that the output will stay stable no matter the temperature. It also features an impressive power supply rejection ratio (PSRR), which ensures the output voltage will not be affected by any fluctuations in the power source.

In summary, the ISL78302AARGCZ is a compact and highly versatile linear voltage regulator integrated circuit, ideal for a wide range of low voltage applications. It offers excellent power supply rejection ratio and thermal stability, as well as programmable current limit and short-circuit protection, making it an excellent choice for battery-powered applications.

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