BU4939G-TR

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In today\'s constantly evolving electronics world, PMIC is an essential component in almost any device. PMICs are responsible for managing power, providing protection, and optimizing performance in a semiconductor system. Among many varieties of PMIC, Supervisors, also known as power supervisors, are important components to ensure that the system keeps operating correctly. One such product is the BU4939G-TR, a SOT-23-3 piece power supervisor IC.

The BU4939G-TR is a low-power power supervisor IC manufactured by ROHM Semiconductor. It is specifically designed for reliable control and protection of electronic circuits. This supervisor IC integrates multiple protection functions and various operating state options, allowing for customization in a variety of applications. Some of these applications include USB ports, computer motherboards, industrial equipment, and automotive electronics.

The BU4939G-TR boasts an impressive set of features. It includes a low current consumption of 1.4uA with a 3V supply voltage; a fast response time of 1.1ms; an interruption prevention system, which stops a false activation operation in the event of a power surge or other fault event; and a wide range operation voltage range of 1.2V to 5.5V.

Underlying the BU4939G-TR is a digital reset supervisor based on a window detector system. This system is designed to provide an efficient, user-friendly reset function to the system, allowing it to accurately recognize unexpected situations and respond accordingly. The supervisor monitors the power supply voltage and compares it to a reference voltage and a window level. If the voltage height or width goes over the set values, an output is asserted.

The BU4939G-TR also offers a special power-down detection feature that is triggered when the power supply voltage decreases below a certain threshold. In this mode, the output is asserted to alert the system. This feature is especially useful in the prevention of failure or damage to the system due to a power failure.

The BU4939G-TR also features a manual reset function, allowing users to manually control the state of the output pins. This allows users to reset the system as needed, providing even greater protection. In addition, the supervisor also has analog inputs, allowing additional circuitry to be connected for further customization.

Overall, the BU4939G-TR is an excellent choice for managing power supply and protection systems. Its integrated protection and various operating state options, as well as its manual reset and analog inputs, make the BU4939G-TR the ideal supervisor for a wide range of applications, including USB ports, computer motherboards, industrial equipment, and automotive electronics.

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