MAX6345TUT+T

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Power management integrated circuits (PMICs) are the heart of any modern portable device. They are responsible for withstanding environmental conditions, controlling the voltage and current of components, and optimizing the device’s battery life. Supervisors are one of many types of PMICs, responsible for detecting power-related events, such as brown-out detection, over-current detection and over-voltage protection. In this article, we will discuss one such supervisor, the MAX6345TUT+T and its application fields and working principle.

The MAX6345TUT+T is a low-power supervisor used for monitoring single-supply rail voltages. It is well-suited for use in battery powered applications, providing protection against under-voltage, over-voltage and over-current occurrences. The IC is housed in the ultra-low-profile 6-pin SOT-23 package, making it ideal for applications with space restrictions. It offers user selectable under-voltage lockout threshold values of 1.68V, 1.86V, 2.04V, 2.22V and 2.40V and over-voltage lockout values of 3.00V, 3.18V, 3.36V and 3.54V.

The MAX6345TUT+T features adjustable output under-voltage lockout (UVLO) and over-voltage lockout (OVLO) thresholds. The device allows three different reset timeout counters: a power-on reset timeout counter with a period of 10ms, a power reset timeout counter with an adjustable period of 50ms to 1.5s and a temperature reset timeout counter with a period of 10ms. These reset counters ensure that abnormal power or temperature conditions are detected and recovered.

In addition to its voltage and current protection features, the MAX6345TUT+T also offers supply current monitoring. It offers an accurate current-sensing comparator with a 2.8mV reference voltage and a programmable threshold value up to 25.5mV. The monitored output is available as a logic output, which can be used to trigger an output pin or a reset pulse.

The MAX6345TUT+T is well-suited for use in battery powered systems such as portable medical devices, consumer products and industrial systems. It offers protection against over-voltage, under-voltage and over-current conditions and provides a reset output to inform the system of a fault condition. The device also monitors power supply current, allowing the system to adjust its power draw as necessary.

The working principle of the MAX6345TUT+T involves monitoring input voltage and current levels and generating a reset signal if they surpass a pre-determined threshold level. The IC is configured using an external resistor divider network. This network is used to connect the device\'s input and reference pins and to set the voltage and current trip points. The reset pulse is then generated whenever the input voltage or current surpasses the specified trip point.

The MAX6345TUT+T is an efficient and reliable power supervisor for low-power and battery powered systems. It offers user-selectable reset timeout counters, adjustable under-voltage lockout (UVLO) and over-voltage lockout (OVLO) thresholds and supply current monitoring, ensuring that the system is protected against over-voltage, under-voltage and over-current conditions. The device’s ultra-low-profile 6-pin SOT-23 package makes it ideal for space-restricted applications.

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