MAX6388XS19D7-T

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Power management integrated circuits (PMICs) provide a broad range of power management services including voltage regulation, power sequencing, thermal monitoring, current limit control, and more. Supervisors are a particular type of PMIC designed to protect devices from over/under voltage and other faults. The MAX6388XS19D7-T is one such supervisor IC from Maxim Integrated, designed to provide high-accuracy monitoring and protection for high-reliability applications. This article will discuss the application field and working principle of the MAX6388XS19D7-T.

Applications

The MAX6388XS19D7-T is designed for applications in the aerospace, automotive, communication, consumer, computing, data storage, medical, industrial, and military/aerospace markets, which require high-accuracy, low-power, and highly reliable supply monitoring and protection. As a supervisor IC, it provides programmable over- and undervoltage protection (VOBP / VOAP), cycle-by-cycle current limiting (CLIP), and thermal protection (THRM). It also features a low-power sleep mode, which helps to conserve power during idle periods.

The MAX6388XS19D7-T is designed for use in environments with a temperature range of -55°C to +150°C. It is available in the small, low-profile (1mm x 0.7mm) TDFN-2 package, which makes it suitable for space-constrained applications.

Working Principle

The MAX6388XS19D7-T is a low-power supervisor IC that combines over voltage (VOBP), under voltage (VOAP), over temperature (THRM), and cycle-by-cycle current limiting (CLIP) protection into a single device. It can monitor inputs from 0.5V to 5.5V with an accuracy of ±1%.

The VOBP and VOAP channels protect the device against over- and under voltage conditions, with programmable trip voltages from 0.5 to 5.5V. The device is designed to be inactive when the input voltage is within the normal operating range. When the input voltage rises above or falls below the programmed trip voltage, the supervisor IC trips and asserts a reset signal. A manual reset input can also be used, to reset the device without needing an external reset generator.

The temperature-sensing circuit of the MAX6388XS19D7-T uses an external thermistor or other temperature-sensing device to monitor the device\'s temperature. The device can be programmed to trip at a programmable trip temperature, or to impose a maximum thermal load on the device to prevent overheating.

The MAX6388XS19D7-T is designed to be dormant and consume very low power (less than 500nA) when in sleep mode. The device automatically wakes up and starts monitoring again when the input voltage exceeds the comparator threshold. This feature makes the device ideal for applications with long idle times.

Conclusion

The MAX6388XS19D7-T is a high-accuracy, low-power supervisor IC designed for the aerospace, automotive, communication, consumer, computing, data storage, medical, industrial, and military/aerospace markets. It provides programmable over- and undervoltage protection (VOBP / VOAP), cycle-by-cycle current limiting (CLIP), and thermal protection (THRM), and features a low-power sleep mode. The device is available in the small, low-profile TDFN-2 package and is specified to operate over a wide temperature range of -55°C to +150°C. This makes it an excellent choice for high-reliability applications in space-constrained environments.

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