MAX708TESA+

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Power management integrated circuits (PMICs) are used to manage the power requirements across a variety of applications and satisfy the power needs of on-board components. To facilitate this, PMICs offer a range of voltage regulators that enable precision voltage regulation, over- or under-voltage protection, current regulation and monitoring, thermal management, and many other features. PMICs involve some type of voltage supervisor to protect the circuits from unwanted electrical transients, and to ensure reliable output voltage under even high-current conditions.

The MAX708TESA+ is a high-performance supervisor and voltage monitor that provides over- and under-voltage protection and supply voltage monitor in one device. It is designed to replace three discrete components, simplify system protection, and reduce board space, while being able to operate accurately over a wide temperature range.

The MAX708TESA+ resides on a single chip and provides several key features that enable the user to protect their PIN or system power from noise and transient threats, provide a clean supply voltage, at the same time reducing their system costs.

MAX708TESA+ Application Field

The MAX708TESA+ is a versatile voltage supervisor, suitable for a wide range of applications ranging from consumer electronics and automotive to industrial and medical. The device offers a wide range of supply voltage monitoring, over-voltage protection, and under-voltage protection for systems utilizing five- and six-wire supplies. It can also provide supply voltage monitoring and over-voltage/under-voltage protection for single-wire supplies, such as USB, Ethernet, and CANbus. The device offers an adjustable trip point voltage between 0.88V and 5.3V.

The MAX708TESA+ incorporates a low-power mode that helps to conserve power when not in use. This allows it to operate in battery-powered systems, where power consumption is an important factor. Additionally, the supervisor offers both active and active/inactive monitoring modes, allowing the user to monitor both rising and falling voltages, as well as the over- and under-voltage conditions.

MAX708TESA+ Working Principle

The MAX708TESA+ operates using the supervisor chip well-known open-drain design. This allows the device to drive a current of up to 200mA while maintaining low impedance. A resistor is connected between the open drain output of the supervisor and ground, providing a voltage drop to the load. The resistor is adjusted to set the required over- and under-voltage trip points. For example, when the voltage applied to the supervisor surpasses the threshold voltage set by the resistor, the open drain output of the supervisor is pulled low and will remain low until the voltage drops below the threshold. When the open drain output is pulled low, the corresponding over-voltage protection or under-voltage protection signal will be sent to the system.The MAX708TESA+ also includes an active monitoring pin that can be used to detect supply or output power disturbances. The active monitoring output is active-low and can be used to issues a warning or shut down the system for the duration of the power disturbance.

Conclusion

The MAX708TESA+ is a versatile voltage supervisor suitable for a variety of applications including consumer electronics and automotive, industrial, and medical. It combines over- and under-voltage protection, supply voltage monitoring, active monitoring, and low-power mode in one circuit. The open-drain design of the MAX708TESA+ ensures low impedance and the ability to drive up to 200 mA of current, while the adjustable trip point voltage offers a wide range of protections. The active monitoring output feature allows the user to detect power disturbances and take action, increasing the reliability of the system.

By combining accurate voltage supervision and over-voltage/under-voltage protection, the MAX708TESA+ allows users to protect their systems from noise and transient threats, reduce system costs, and improve the overall reliability of their design.

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