MAX6444US44L+T

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The MAX6444US44L+T is classified as a part of the PMIC – Supervisors family of integrated circuits, designed to monitor overvoltage or undervoltage conditions in systems containing multiple power supplies. This device is capable of supervising up to four voltage rails, providing a guaranteed-accurate trip point along with a power-on reset (POR) system for each monitored supply.This easily-settable part provides advanced features, including adjustable switching levels of 1.63V-3.6V and a fixed hysteresis of 400mV, allowing application-flexible parameter setting. It has a low quiescent current of only 25μA during normal operation, making this device energy efficient while keeping low levels of power consumption.The MAX6444US44L+T receives up to four separate supply voltages, and with its intelligent design, it monitors them individually to detect undervoltage and overvoltage conditions. It has dedicated POR/UVLO outputs for each supply rail as well, so that it can provide an active reset for protection against a fault in one supply but not affect another.A big benefit of this PMIC’s design is that it offers both inrush current surge protection and short-circuit protection. This allows the system designer to limit its combined power consumption if an output load experiences a short circuit, since the device applies a low-impedance across the load to limit its current draw.Additionally, the MAX6444US44L+T is highly configurable with a flexible control input structure and a superset of options to adjust the trip level and threshold voltage on a per-rail basis. This allows the user to adjust the device’s behavior depending on their application need and conforming to the system design, while maintaining a safe, consistent and accurate protection system.Finally, the MAX6444US44L+T also provides an open-drain shutdown (SDWN) output, allowing designers to use additional features such as power-on sequencing, power-off sequencing, and delayed power-on sequencing. This output can be triggered by an overvoltage or undervoltage condition, and is capable of latching or resetting in accordance with a predetermined timeout value.To summarize, the MAX6444US44L+T is a powerful and flexible PMIC – Supervisors device, offering a range of user-defined configuration options, and a feature set specifically tailored for monitoring multiple power supplies. This device ensures a safe, reliable and consistent protection system by providing accurate and adjustable trip points, current limiting and power-on reset capability, as well as an open-drain shutdown output for system control and power switching.

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