MAX6338JUB

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Introduction

A PMIC (Power Management Integrated Circuit) is a specialized integrated circuit for power management applications, like providing voltage rail regulation, voltage sequencing and system monitoring functions, ensuring the power delivered to the systems is reliable and stable. Supervisors are an important part of PMIC feature families, which perform different functions such as monitoring the power-up and power-down states, resetting the system, and their purpose is to protect and ensure the reliability of the whole system. The MAX6338JUB is a member of MAXIM\'s single-channel supervisor component families.

MAX6338JUB Application Field and Working Principle

Overview and Features

The MAX6338JUB is designed to detect supply voltages with accuracy as small as +0.3%. This supervisor device can be used in an entire range of fielded applications, and the output signal or reset the system during start-up or when the voltage is too low. It is capable of taking either active-high or active-low reset signal, by changing an external capacitor, and can help to protect the system against over-temp and other fault conditions.

The device is available in 7-pin SOT23W packages, and its key feature includes a precision voltage monitor, internal power-on reset generator, easy-to-use single-pin push/pull reset output, and adjustable reset timeout interval.

Working Principle

The MAX6338JUB is composed of selective functional blocks, including resistors, comparators, amplifiers, and so on. Its working principle is shown as below:

When the supply voltage comes up to its prescribed level, the block will turn on its comparator, signal onto the reset output pin. After that, the input signal will be compared with the internal voltage reference, and if the voltage is higher than preset, the comparator will start to reset the reset output, and change the signal output state. This signal will then go out of the device, and be fed back to the system, reset the microprocessor, and the block will be reset again until the voltage comes down.

When the voltage drops below the specified threshold, the comparator will start to reset the output, prolonging the reset interval time, and the block will put the system back into the reset mode. During the reset period, a capacitor will be charged and discharged by the comparator, and the reset output will stay active until the capacitor is completely discharged, and then reset the system.

Therefore, the MAX6338JUB is an ideal supervisor component for voltage monitoring, power on/off reset, and provides reliable operation.

Conclusion

The MAX6338JUB is a supervisor component to protect and ensure the reliability of customer systems and products. It provides various features such as precision voltage monitor, internal power-on reset generator, easy-to-use single-pin push/pull reset output, and adjustable reset timeout interval. It\'s available in 7-pin SOT23W package and effectively taking either active-high or active-low reset signal. Overall, the MAX6338JUB is an ideal component for voltage monitoring, power on/off reset and provides reliable operation.

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