ISL9021IRU4Z-T

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The ISL9021IRU4Z-T is a three-terminal, adjustable, low-dropout voltage regulator which operates with a supply voltage ranging from 4.5V to 28V. Designed to deliver a minimum 3.2mA of output current, the ISL9021IRU4Z-T features an adjustable output voltage range of 0.8V to 1.15V. This device is offered in two versions, one with an enable control pin, making it ideal for applications that need to turn off the output. The ISL9021IRU4Z-T also features excellent thermal resistance and guaranteed current limit, making it an ideal linear voltage regulator for automotive, industrial, and portable applications.

ISL9021IRU4Z-T is mainly used in automotive, industrial, and portable applications. It is designed to deliver a constant voltage output and is ideal for applications requiring low dropout voltage and improved thermal performance. Auto manufacturers have embraced the device due to its excellent performance, long battery life, and wide operating environment.

The ISL9021IRU4Z-T is a low-dropout monolithic regulator that works with a high input voltage and a low output voltage. It provides low output voltage ripple, and low transient response time. The device features current-limiting and over-temperature protection. It has fast turn-on time and excellent thermal resistance. The device also features thermal shut-down, output voltage accuracy, and an adjustable output voltage range.

The working principle of the ISL9021IRU4Z-T is based on the open-loop voltage regulating technology. This is how it works: voltage supplied to the device is stepped down to the desired output voltage by the action of a precision feedback circuit. This circuit is made up of two resistors, one of which is used to set the output voltage. The voltage reference provided by the Precision Adjustable Reference is compared against the voltage developed across the output voltage setting resistor and error amplifier amplifies the difference between them. The amplifier then provides a dynamic control signal to a power switch. This power switch, together with a series pass element, decreases or increases the available output current by turning off or on the switch in response to the control signal.

Because of its wide input and output voltage range, its low dropout voltage, and its excellent thermal performance, the ISL9021IRU4Z-T is ideal for any application requiring linear voltage regulation. It provides superior performance to DeoxIT or SiC components, and it is easier to use due to its adjustable reference design.

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