MAX6738XKLD3+T

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MAX6738XKLD3+T is a PMIC (Power Management Integrated Circuit) designed by Maxim Integrated. It is a member of the company\'s family of Supervisors, and its application field and working principle are discussed in the following article.

The MAX6738XKLD3+T is best suited for small, low-power and cost-sensitive embedded systems such as personal medical devices, wearables, energy meters, and small appliances. It is capable of monitoring voltage rails, alerts and reset/shutdown circuitry to protect these systems from voltage transients and other disruptions. This PMIC has a 3V operating range, making it suitable for battery-powered designs.

This supervisor chip contains a wide range of Voltage Monitoring (VMON) thresholds and logic: Input (VIN) and Output (VOUT) for monitoring VCC, VDD and VDDR, as well as GPIO for monitoring GPIO-controlled voltage rails. Additionally, the circuit has a Window Watchdog (WWD) function that can be used to monitor two separate voltage levels to detect the window of the supply voltage, allowing the system to recover from fault conditions and reset the system. The circuit also has an overtemperature alert and reset that is available with a thermal sensor input in a QFN package, allowing the system to detect and reset itself in the event of high temperature.

The MAX6738XKLD3+T is designed to be low on power consumption. It can operate with as low as 0.15µA active mode current at 3V, and with as low as 0.01µA standby mode current at 3V. This is made possible by incorporating Maxim\'s industry-leading low-power-management technologies and algorithms. It also has a variety of power-saving features like an adjustable sleep timer and wake-up timer for powering up and down the circuits.

The MAX6738XKLD3+T is also designed with a wide range of features to ensure reliability and robustness. It has two general-purpose Inputs/Outputs, along with two dedicated Inputs to detect voltage signals and thresholds, allowing it to be set up to detect specific power losses to prevent a system crash. It also provides an adjustable debounce time to eliminate false trip-conditions due to noise. The circuit also features power-on reset and power-on delay to start the system at a known condition. Furthermore, the built-in delay feature allows the reset signal to stay active for a few milliseconds after the power is restored, preventing a false restart due to noise or system glitches.

The MAX6738XKLD3+T is a simple yet powerful PMIC for cost-sensitive applications. It offers robust voltage monitoring, alert and reset/shutdown circuitry to ensure system stability, and has a low-power consumption. It also has a wide range of features to ensure reliability and robustness, and can be configured to suit the needs of the application.

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