MAX6465XR22+T

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Power supply monitoring and control is a must for many embedded systems. The MAX6465XR22+T from Maxim Integrated is a simple, low-cost power supervisor IC that offers protection and control of two rails with adjustable fault thresholds. It is ideal for embedded systems that need to feed a wide range of voltages from a single supply.

Overview of MAX6465XR22+T

The MAX6465XR22+T power supervisor is a low-cost, ultra-low-power (2µA quiescent current) solution for supervising dual supply rails. It offers adjustable fault thresholds and includes two independent delay timers that are programmable to accurately handle the reset timing. The device provides protection against under voltage, over voltage and over temperature. It can monitor a single voltage source with two adjustable thresholds, or it can monitor two independent voltages with each having independently adjustable thresholds.

Application Field

The MAX6465XR22+T power supervisor is ideal for a variety of embedded system applications. It is suitable for many military, aerospace, medical and industrial applications. It is also suitable for FPGA and DSP applications that require dedicated voltage regulation and fault protection.

Working Principle

The MAX6465XR22+T has two adjustable monitor pins, with each having its own adjustable threshold voltage. The two monitor pins are typically connected to an external power supply through two voltage dividers. The voltage of the power supply is monitored by each of the monitor pins. If the power supply voltage exceeds its preset threshold, the supervisor will issue a reset signal, which will force the system to shut down.

The reset signal is triggered when the voltage drops below the lower threshold or when it exceeds the upper threshold. The delay timer can be used to set the time period between the trigger event and the reset signal. The reset signal is a low-active signal, which means it is active low—it is activated when the voltage drops below the lower threshold or exceeds the upper threshold, and de-activated when it returns to its normal range.

The MAX6465XR22+T also offers protection against high temperature. If the monitored voltage exceeds a preset temperature, the supervisor will issue a reset signal and force the system to shut down. The supervisor features an adjustable over-temperature threshold.

Conclusion

The MAX6465XR22+T power supervisor offers a reliable and low-cost solution for monitoring and controlling two supply rails with adjustable fault thresholds. It is ideal for embedded systems that require dedicated voltage regulation and fault protection. It is suitable for many military, aerospace, medical and industrial applications, as well as for FPGA and DSP applications.

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