MAX6882ETE+

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A supervisor integrated circuit (SUP), such as MAX6882ETE+, provides circuit monitoring and system power regulation at lower voltages than traditional linear regulators and switches. With the advent of digital technology and the increasing demand for higher performance, the use of supervisors and power management integrated circuits (PMICs) has become a common practice. This article will discuss the application field and the working principle of MAX6882ETE+.

Application Field of MAX6882ETE+

The MAX6882ETE+ is a high-performance supervisor with a versatile, full-featured reset circuit. It fits in a tiny 8-pin WSON package, and features a wide power supply input range from 2.2V to 5.5V, making it suitable for any low-voltage regulated power supply. The versatile reset circuit can be used to monitor a variety of signals, including power supplies, adjustable reset thresholds, and separate manual reset input. This makes the MAX6882ETE+ suitable for applications in a variety of industries, including computer, industrial and instrumentation systems. The reset circuit is also configurable to automatically recover from reset conditions or to preserve power during loss of system activity.

The reset circuit in the MAX6882ETE+ has an active-low reset output (RESET) and an open-drain open collector output (WDI). The active-low reset output is monitored by a host processor or controller to reset the system when necessary. The open-drain/open collector WDI output is used to enable/disable an external watchdog timer if the processor or controller fails to respond to RESET.

In addition to reset circuitry, the MAX6882ETE+ features power-on-reset and manual reset input pins, a 0.5V reference, an on-chip voltage detector, and two selectable power-fail comparators. This wide range of features makes the device suitable for a variety of applications, from automotive systems to industrial robots.

Working Principle of MAX6882ETE+

The MAX6882ETE+ is a highly-integrated supervisor IC. The device\'s reset circuit is a multi-purpose supervisor that monitors the voltage levels of three system voltages and delivers a reset signal if any of these levels deviate from the selected threshold values. The MAX6882ETE+ monitors two supply lines, an adjustable logarithmic reset treshold (VRT) and a separate manual reset input (MR). The voltage detector (VDS) also monitors the system voltage and delivers an active-low reset signal if the voltage deviates from its programmed threshold. The MAX6882ETE+ can also generate a pulse-width modulated (PWM) reset signal, which is activated in response to undervoltage conditions.

The MAX6882ETE+ integrates two power-fail comparators that provide two independent comparators with dual selectable active-low voltage trip points. The two power-fail comparators can be configured to either monitor the system power inputs or provide an error signal when either of the two power lines exceed the preset trip point. The power-fail comparators are particularly useful in multi-rail power supply systems where the status of a voltage rail depends on the status of another.

The MAX6882ETE+ integrates a 0.5V reference voltage that can be used to provide a stable reference voltage for analog circuits. The on-chip voltage detector (VDS) monitors the supply voltage and is used to detect undervoltage and overvoltage conditions. It can be used to trigger an active-low reset signal or to generate a pulse-width modulated (PWM) reset signal.

The MAX6882ETE+ includes a manual reset input (MR) that can be used to reset the IC and system activity. The MR pin is an open-drain/open collector input and it can be used to detect a rising edge of an external signal. The MR pin can be used to manually reset the system or to activate the watchdog timer if the system fails to respond to reset.

The MAX6882ETE+ features a wide range of features that make it suitable for a variety of applications. The reset circuitry is highly configurable and can be used to monitor a variety of signals, and the two power-fail comparators provide error signals when any of the two power lines exceed their preset trip point. In addition, the on-chip voltage detector can be used to detect undervoltage and overvoltage conditions, while the manual reset input can be used to activate the watchdog timer if the system fails to respond to reset. These features make the MAX6882ETE+ the supervisor of choice for low-power applications.

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