MAX840ISA+T

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The MAX840ISA+T is a special purpose voltage regulator designed for use in a variety of application fields. Its wide supply voltage range and low quiescent current make it suitable for embedded systems and portable applications. This article will discuss the MAX840ISA+T\'s application field, working principle and its features.

Application Field

The MAX840ISA+T is a special purpose voltage regulator and can be used in a variety of applications such as computer motherboards, desktop PCs, LCD monitors, optical storage media, and other systems. It is a low drop-out regulator and is suitable for systems with input voltages as low as 1V. It is also capable of operating with a wide range of output voltages, ranging from 0.5V to 3.2V. Furthermore, it supports output currents of up to 150mA and offers high efficiencies and low operating noise.

As mentioned before, this voltage regulator is ideal for embedded systems and portable applications. It has a wide operating temperature range of -40°C to +85°C, making it suitable for use in harsh environments. Furthermore, it is available in an ultra-small surface mount package, making it well-suited for applications that require an extremely small footprint.

Working Principle

The MAX840ISA+T is a three-terminal adjustable linear voltage regulator which provides a regulated output voltage from an unregulated input voltage. It features an integrated shunt resistor which provides improved line and load regulation of the output voltage, even when the input voltage varies considerably.

The shunt regulator provides a low quiescent current operation, ensuring a low overall system power consumption. Furthermore, the voltage regulator\'s peak output current can be set by a single external resistor and is adjustable over a wide range. Additionally, the device includes an enable pin which allows the output voltage to be disabled without changing the regulator\'s settings.

Features

The MAX840ISA+T is a highly efficient device, providing up to 92% efficiency. Furthermore, its low dropout voltage of 250mV provides improved line and load regulation even when there is considerable variation in input voltage.

The device is equipped with an input overvoltage protection, which helps protect the device from excessive input voltage and minimizes power loss in the event of an overvoltage condition. The device also features an output short-circuit protection and an output undervoltage protection which helps protect the device from excessive output current.

Moreover, the device supports a wide operating temperature range of -40°C to +85°C, making it suitable for use in most applications. It is also available in an ultra-small surface mount package, providing an ideal solution for applications that require a small footprint.

Conclusion

The MAX840ISA+T is a highly efficient, three-terminal adjustable linear voltage regulator which provides a wide range of input and output voltages, support for up to 150mA output current, and low quiescent current operation. It is suitable for use in a variety of application fields such as computer motherboards, desktop PCs, LCD monitors, optical storage media and other systems. Its wide operating temperature range and ultra-small surface mount package make it ideal for use in embedded systems and portable applications.

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