MAX5903ABEUT+T

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PMIC - Hot Swap Controllers

The MAX5903ABEUT+T from Maxim Integrated is a Hot Swap Controller IC with integrated FET and analog monitoring. Its versatile operating range of 4.5V to 18V makes it suitable for a wide range of applications. The IC is specifically designed for systems and components where overtemperature protection and low power consumption is required. The MAX5903ABEUT+T can work with both pre-charging and post-charging circuits, depending on the specific application.

The main features of the MAX5903ABEUT+T include the following: a 0V to 18V operating voltage range, 2% voltage accuracy, a low quiescent current of 2.1mA, and a 1.5A maximum current. The integrated FET reduces overall costs, board complexity, and package size. Additionally, the IC integrates comprehensive temperature and current monitoring, providing additional protection for the system.

Working Principle

The MAX5903ABEUT+T works according to the following principle. When the power supply voltage across the FET rises to the target voltage, an enable signal is sent from the IC to the FET, turning it on. The FET then connects the load to the power supply and begins to carry a current. This current is monitored and limited to the set current limit. If the current falls below the set limit, the FET is turned off, disconnecting the load from the power supply. The internal monitoring circuit provides a margin for the FET so it does not operate at the specified current limit.

The MAX5903ABEUT+T also provides overtemperature protection. When the temperature of the FET exceeds the maximum specified temperature, the IC will shut down the FET and provide visual indication of the occurrence. The IC also features a soft-start mode, adjustable deadtime, and overvoltage protection.

Applications

The MAX5903ABEUT+T can be used in a variety of applications, including smart phones and tablets, industrial systems, telecom, server and enterprise computing, and renewable energy systems. The integrated FET and comprehensive temperature and current monitoring make it suitable for power-sensitive applications, where low power consumption and high efficiency are required. It can also be used in hot-swappable applications, where the system power supplies need to be brought online quickly and safely.

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