MAX821SUS+T

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Power management integrated circuits (PMICs) play a central role in modern system designs, providing power for many combinations of digital and analog functions. PMICs provide the ability to efficiently manage and manipulate power supplied from a variety of sources. In this article, we will be discussing one particular PMIC, the MAX821SUS+T, and its application field and working principle.

The MAX821SUS+T is a low-power supervisor IC designed to optimize digital and analog power supplies in battery-powered applications. It ensures proper logic power on/off control and reset timing by automatically monitoring the status of critical logic supplies. With its flexible power management, the MAX821SUS+T helps extend battery life, reduce cost and improve system reliability.

The MAX821SUS+T is well-suited for a wide range of applications, including portable medical, industrial, communication and consumer electronics. It can be used in applications where ultra-low power is needed, in systems where backup power is at a minimum, and in designs where CPU efficiency and accuracy is essential. The supervisor’s low power and wide input voltage range make it ideal for use in automotive, aviation and marine applications. Specifically, it is designed to operate over a temperature range of -40°C to +85°C with a temperature coefficient of 0.02%/°C.

The MAX821SUS+T is a feature-rich supervisory IC with a simple configuration. It features an internal manual reset input, toggle timer, power fail indicator, power skip, watchdog timer, self-tracking input voltage range and an adjustable reset output. It also features a low voltage reset output, automatic fast power on and selectable reset output delays.

The MAX821SUS+T operates in three basic states: pre-reset, reset, and power-on. In a normal system, the MAX821SUS+T will enter the pre-reset mode when power is applied. Once the voltage on the 3.3V rail is high enough, the MAX821SUS+T will transition to the reset mode and issue a reset pulse to the logic supply. As the logic supply ramps up, the MAX821SUS+T will switch to the power-on mode and begin controlling the power to the logic supply.

The MAX821SUS+T is an ideal solution for applications that require reliable power supply control. Its low voltage reset output and adjustable delays make it well-suited for demanding digital and analog circuit designs. Its wide input voltage range, temperature coefficient and low power consumption make it an optimal choice for battery-powered applications, such as portable medical, industrial and consumer electronics.

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