XC6122E441MR-G

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PMIC (Power Management Integrated Circuit) offers power regulating functionalities on personal and portable electronic devices. Supervisors are one type of PMIC components that monitor and supervise two inputs, Voltage and Clock. They are used to detect any abnormalities in the voltage and clock, and trigger system reset to avoid system crash due to a malfunctioned voltage or clock. The XC6122E441MR-G is one type of supervisor, aiming to support all kinds of single-supply, clock-generation and power reset devices.

Applications

The XC6122E441MR-G is a total power Reset Supervisor from Toshiba Semiconductor, providing ultra-low current consumption of 18µA (at VCC=3.0 V) and reliable reset protection features. It is suitable for mobile phones, digital cameras, pocket PCs, personal digital assistants and other electronic devices that require a reliable power supply. This product is highly recommended when an ultra-low power consumption, a higher reset voltage accuracy, a reset voltage variation, a shorter reset voltage delay and a shorter reset release time are required.

This device has a wide operating voltage range of second power-supply from 0.6 V to 8 V, so it is capable of behaving properly even when the supply voltage changes. The XC6122E441MR-G also offers an active-low RESET output that features a guaranteed reset voltage accuracy of ±2% (max). This makes it suitable as a supervisor circuit of devices that require an ultra-low power consumption and precision reset operation.

Working principle

The XC6122E441MR-G is an active-low reset supervisor, meaning it is triggered when its secondary power supply input voltage drops below the predefined threshold. This threshold value is determined by the external resistor (RST) and capacitor (CST). When the voltage drops under the set threshold, this device\'s reset-output will go low, triggering a system reset to avoid any further damage to the system.

This device is designed to provide a reset operation even at ultra-low supply voltage and its RESET output is guaranteed accurate to within ±2%. This guarantee means it is considered perfect for applications with high-precision requirements. The tested voltage delay time of this device was found to be 15ms (VCC to RESET response time) and the reset release time was just 0.4 ms.

This device is equipped with a Voltage Detector circuit that monitors the VCC level during a brown-out event, when the system power supply is abnormally low. This Voltage Detector helps to reduce the system reset time by accurately detecting the VCC level even in the case of a rapid voltage change. The integrated Voltage Detector also offers an adjustable voltage detect delay time and adjustable Reset Release Time functions.

The XC6122E441MR-G is recommended for use in mobile phones, digital cameras, pocket PCs, and other electronic devices where an ultra-low power consumption and precision reset operation are of utmost importance. This device is designed to provide an accurate and reliable reset operation, even in low voltage conditions.

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