ISL9011AIRFJZ

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The ISL9011AIRFJZ is an integrated monolithic regulator that provides necessary resistive isolation and linear regulation for power supplies for fixed voltage and current. It is a family of integrated voltage regulators designed to meet the needs of an ever-increasing range of electronic applications. It is designed to alleviate cost and size constraints associated with similar regulator solutions. It has highly regulated output voltage, low current consumption, accurate current limiting, thermal shutdown, and short-circuit protection features.

Application Field: ISL9011AIRFJZ integrates ultra-low voltage 2/3/4 pin package regulators with high performance, adjustable output current limiting for battery operated system applications such as cellular phones, PDAs, and digital still cameras. It integrates internal transistor, resistors, and capacitors into a single package, providing smaller form factor and cost reduction. Its thermal shutdown feature protects against overtemperature conditions and overvoltages. Its internal filter capacitor also minimizes EMI and reduces system noise.

Working Principle: The ISL9011AIRFJZ has a unique 3-phase regulation principle, which uses a low voltage buck scheme to provide linear regulation. Specifically, it includes an error amplifier that produces an error signal proportional to the difference between the output voltage of the regulator circuit and the reference voltage. This error signal is then fed to a output stage thus modulating the output. The output stage modulates the output in order to produce the desired voltage or current at the output. Furthermore, a feedback loop is used to process feedback from the output, ensuring that the output is stable.

The ISL9011AIRFJZ is designed to provide a high efficiency, stable, and reliable voltage regulation with an ultra-low current consumption. It can work on both low and high input voltages and its output current limiting feature ensures protection from sudden out-of-range loads. Moreover, it ensures superb line and load transient by reducing output impedance down to 0.1 ohm. The advantages of the ISL9011AIRFJZ make it the ideal choice for a variety of system applications requiring highly regulated low voltage and current supply.

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