ISL62771IRTZ-T

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The ISL62771IRTZ-T is a monolithic Buck switching regulator, primarily intended for automotive applications. It uses an integrated user-programmable integrated-sense FET (Sense FET) to accurately regulate output voltage and current in high current, high differential voltage applications. It is designed to provide low output voltage noise performance while providing very fast transient response, making it ideal for use in high powered, high frequency power systems such as those found in automotive automobiles. This device can be used in a variety of applications, including automotive audio/video, lighting, power management, and powertrain.

Features

The ISL62771IRTZ-T is available in a small 3.5x3.5mm Power QFN package. It has an integrated sense FET which enables it to accurately regulate output voltage and current in low input-voltage, high-current, and high-differential voltage applications. This device is equipped with a wide input voltage range of 6V to 50V for automotive applications and it operates in a very wide temperature range (- 40°C to +125°C). It features 2.5MHz switching frequency, allowing for high efficiency and low output noise. It also features built-in thermal shutdown and over/under voltage protection. The device is also compatible with industry standard I2C serial interface.

Working Principle

The ISL62771IRTZ-T is a advanced load switch regulator which provides an efficient way of regulating the output voltage and current in applications that require a high current, high differential voltage supply. The device operates in step-down (buck) mode, drawing power from the higher input voltage and regulating the output to any desired level lower than the input voltage. The buck regulator employs a synchronous rectification system using an internal sense FET on the low side to achieve high efficiency. A PWM modulated control loop regulates the output voltage and the switching frequency is determined by the control loop itself. The fast transient response of the regulator is made possible by the sense FET and the low input voltage range of 6V to 50V makes it suitable for automotive applications.

Applications

The ISL62771IRTZ-T is suitable for a wide range of applications in automotive industry. It is ideal for use in automotive audio/video, lighting, power management, and powertrain systems. It is also suitable for use in battery powered devices such as laptops and tablets. It can also be used in consumer electronics such as televisions, DVD players, and portable audio devices.

Conclusion

The ISL62771IRTZ-T is a specialized Buck switching regulator from Intersil Corporation, designed primarily for automotive applications. It comes with a wide input voltage range and operates over a wide temperature range, thus making it suitable for automotive applications. It also features an integrated sense FET that helps in providing fast transient response and high efficiency. This device is suitable for a wide range of automotive, consumer electronics, and battery powered applications.

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