MAX1589AEZT075+T

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The MAX1589AEZT+T is a versatile linear voltage regulator that is part of Maxim Integrated\'s family of PMIC (Power Management Integrated Circuits). This device offers a range of features that make it suitable for a variety of applications.

The device is designed with a wide input voltage range of 1.2V to 5.5V and an output voltage range from 0.8V to 5.5V, it offers a maximum output current of 0.75A and a quiescent current of 6.4μA. It also features a low dropout of 150mV at 0.5A and 200mV at 0.75A. This makes the device suitable for low power/low current applications.

The device has an adjustable output voltage option which allows the user to customize the output voltage. Other features include an output voltage soft-start, overvoltage protection, and thermal shutdown. The MAX1589AEZT+T package is the tiny 3mm x 3mm TDFN package which can be used in space-constrained applications.

The device has excellent line and load regulation of ±0.1% and a minimum load current of 500μA. The device also has a high PSRR (Power Supply Rejection Ratio) of 60dB which allows the usage of noisy power supplies in the circuit.

The MAX1589AEZT+T is ideally suited for a variety of applications such as to provide power for microcontrollers and DSPs, portable and battery-powered systems, home automation and industrial control systems. It is also suitable for charging applications of lithium-ion batteries.

Working Principle

The MAX1589AEZT+T linear voltage regulatoruses a basic linear regulation principle to regulate the input voltage. It consists of an error amplifier, a control circuit and an output stage, where the error amplifier compares the output voltage with a voltage reference, and a control circuit converts the amplified difference into a drive voltage which is then applied to the output stage.

The output stage consists of a series element, usually a MOSFET, whose amount of conduction is controlled by the drive voltage, which in turn regulates the output voltage. The conduction of the series element is controlled such that the output voltage is kept close to the reference voltage, thus providing a regulated voltage.

The MAX1589AEZT+T device also includes an overvoltage protection circuit that prevents the output voltage from exceeding a predetermined voltage level, thus protecting the device and the system from damage.

Conclusion

The MAX1589AEZT+T is a wide input range linear voltage regulator. It is suited for low power/low current applications and includes features such as adjustable output voltage, overvoltage protection, and thermal shutdown. This makes it suitable for a variety of applications such as power supplies for microcontrollers and DSPs, portable and battery-powered systems, home automation and industrial control systems, and charging of lithium-ion batteries.

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