ADP3330ARTZ-3-RL7

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ADP3330ARTZ-3-RL7 Application Field and Working Principle

ADP3330ARTZ-3-RL7 is a type of PMIC (Power Management IC) Voltage Regulator belonging to the linear category. It is a general-purpose voltage regulator that provides a simple, low-cost solution to provide power to ICs and industrial systems as well as consumer applications. The ADP3330ARTZ-3-RL7 is a 2-A Fixed, High-Marginality Voltage Regulator that operates from an input voltage of 1.8 V to 5 V, and provides a regulated output voltage of 3.3 V.

Features

The ADP3330ARTZ-3-RL7 features a low quiescent current, high power efficiency, and robust protection against thermal and overvoltage conditions. It has an adjustable threshold voltage of from 5% to 10% below the output voltage, which allows it to be used as either a low-dropout reguator (LDO) or a power switch. It also has an integrated power-on reset (POR) delay circuit, which ensures that the output voltage does not fall below the threshold voltage until the chip has been fully initialized.

The ADP3330ARTZ-3-RL7 is housed in a RoHS-compliant SOT-23-5 package, making it suitable for use in space-constrained applications and commercial products.

Application Fields

The ADP3330ARTZ-3-RL7 is especially well-suited for applications where the power supply is highly regulated, such as in point-of-load regulators, isolated DC/DC converters, LED lighting and driving circuits, and industrial/consumer products.

Working Principle

The ADP3330ARTZ-3-RL7 operates on a common-collector configuration, which means that the output voltage is below the input voltage by a voltage drop of between 5% and 10%, depending on the setting of the adjustable threshold voltage. This is accomplished by a PNP bipolar transistor, acting as an emitter follower, whose emitter is connected to a resistor network that is used to set the output voltage. The output voltage is compared to an internal reference, and the difference in voltage is used to drive the transistor and thus adjust the output voltage.

The ADP3330ARTZ-3-RL7 also contains two comparators that are used to ensure that the output voltage remains within a pre-defined range. The first one is an overvoltage comparator that monitors the output voltage and shuts down the device when it reaches an overload condition. The second is an over-temperature comparator that shuts down the device if the junction temperature exceeds a pre-defined threshold.

In addition, the ADP3330ARTZ-3-RL7 includes an integrated reset circuit, which ensures that the output voltage does not fall below the set threshold voltage until the chip has been fully initialized. This reset circuit is triggered by a rising input voltage and will automatically reset when the chip has stabilized. The ADP3330ARTZ-3-RL7 also offers protection against reverse current and short-circuit conditions.

Conclusion

The ADP3330ARTZ-3-RL7 is a highly efficient, low-cost solution for providing power to ICs and industrial systems. Its integrated reset circuit and robust protection features make it an excellent choice for applications where the power supply needs to be highly regulated. It is housed in a RoHS-compliant SOT-23-5 package, making it suitable for use in space-constrained applications and commercial products.

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