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Introduction to ISL9021AIRUJZ-T7A

The ISL9021AIRUJZ-T7A is a high performance power conversion and step-down, integrated DC to DC regulator with a wide operating temperature range from -40°C to 85°C. The ISL9021AIRUJZ-T7A operates over a wide input voltage range of 6V to 22V with adjustable output voltage range of 0.6V to 17V with an accuracy of ± 1.25%. It delivers up to 0.8A of continuous output current at up to 3A of peak load current.

ISL9021AIRUJZ-T7A Application Field

The ISL9021AIRUJZ-T7A is suitable for a wide variety of applications including battery powered devices, industrial and automotive equipment, wireless receivers and modems, portable medical instruments, and GPS systems. It is ideal for space-constrained, cost-sensitive, high-performance power systems. Additionally, the ISL9021AIRUJZ-T7A provides a highly integrated solution with minimal external components, saving designers time and effort in component selection, board layout, and board-level testing.

ISL9021AIRUJZ-T7A Working Principle

The ISL9021AIRUJZ-T7A uses a constant-on-time (COT) architecture to regulate the output voltage. A comparator inside the IC compares the output voltage with a feedback signal. A voltage control oscillator uses this signal to control the switching frequency of an internal MOSFET. The resulting signal is then used to regulate the output voltage. The MOSFET controls the amount of current flowing through the inductor, which is connected to the input voltage. This causes the output voltage to increase or decrease according to the demand and the operation of the IC.

Conclusion

The ISL9021AIRUJZ-T7A is an efficient and reliable step-down, integrated DC to DC regulator ideal for a variety of power systems. Its wide input voltage range, adjustable output voltage range and high efficiency make it ideal for cost-sensitive, space-constrained, high-performance power designs. Its unique constant-on time architecture enables the IC to accurately regulate the output voltage, using a MOSFET to control the amount of current flowing through the inductor.

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