MAX6702SKA+

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PMIC - Supervisors: MAX6702SKA+ application field and working principle

Power management integrated circuits (PMICs) are critical components in most power management systems today, designed to manage the power supply to other devices and components. The MAX6702SKA+ is a PMIC supervisor IC from Maxim Integrated. It is a low-voltage, compact, and accurate circuit supervisor that helps to monitor the power supply of a system and provides system system power on/off control. This article focuses on the application field, as well as the working principle of the MAX6702SKA+ PMIC supervisor IC.

Application Field

The MAX6702SKA+ PMIC supervisor IC is mostly found in industrial, communication, computing and consumer electronics applications. It is used in applications where a quick response time and a high level of accuracy are needed, such as in monitoring the power supply of a system and providing system system power on/off control. The MAX6702SKA+ supervisor IC has a wide operating voltage range of 1.5V to 5.5V, so it can be used in microprocessors and logic circuits that require low voltage supplies. Furthermore, it is designed to work in harsh environment, with a temperature range from -40°C to +125°C.

The MAX6702SKA+ supervisor IC is also used for monitoring a voltage that must remain at a given absolute value (such as system power in a powered-on state, or leakage current in a powered-off state). It also supports manual reset input and open-drain outputs, making it suitable for reset circuitry. Additionally, it has a built-in watchdog timer that can be used for automatic system reset.

Working Principle

The MAX6702SKA+ PMIC supervisor IC is used to monitor the power supply of a system, by sensing the voltage drop across a voltage divider formed by a pair of resistors. The device can detect a power-on or power-off event, as well as a low-voltage warning signal. It is equipped with a comparator and a few logic gates that compare the voltage obtained at the voltage divider to a reference voltage (VREF). The output of the comparator will be a logic low if the voltage is greater than the reference voltage, and a logic high if the voltage is less than the reference voltage.

The MAX6702SKA+ PMIC supervisor IC also contains a watchdog timer capable of issuing a reset signal. The watch dog timer is typically used to either reset a system when an abnormality is detected (such as a locked up microprocessor), or to periodically reset the system to ensure that it is still running correctly. The reset signal is issued when the watchdog timer reaches its timeout period, i.e. when the timer’s count reaches zero.

The MAX6702SKA+ PMIC supervisor IC also supports manual reset inputs. The manual reset circuit is typically used to force a system reset when a given condition is met, such as when an abnormality is detected or an error occurs. The manual reset circuit includes a few logic gates, an output driver and a switch. When the manual reset input is triggered, the logic gates output a logic high signal, which is used to power an output driver, which in turn triggers the switch, thus resetting the system.

The MAX6702SKA+ PMIC supervisor IC is a compact and accurate circuit supervisor that can monitor the power supply of a system and provide system system power on/off control. It is suitable for applications that require a quick response time and a high level of accuracy. It can detect a power-on or power-off event, as well as a low-voltage warning signal. Its built-in watchdog timer can be used for automatic system reset. In addition, it supports manual reset input and open-drain outputs, making it suitable for reset circuitry.

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