XC6121F528MR-G

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Power management integrated circuits (PMICs) are essential components for regulating and controlling power for micro-processors, memory devices and other integrated circuits. Supervisors, a type of PMIC, are responsible for monitoring a single power rail and providing system reset, ensuring the reliability and availability of the component. XC6121F528MR-G is part of these power management integrated circuits. It is a single-channel voltage monitor and reset generator with an active-low system reset output, ideal for monitoring a power supply used for micro-processors, memory and other integrated circuits.

The XC6121F528MR-G IC is housed in a 8-pin SOIC-8N package, and requires a voltage supply of 3.0V ± 10%, typically used in the power supply reset circuits of microcontrollers, memories, FPGA and CPLD. It has a monitoring threshold range of 2.99V to 4.26V, and it has the ability to source current up to 40mA for reset signalling.

In addition, the XC6121F528MR-G provides an active-low output which pulls-low in response to an error event. It allows the user to configure the reset threshold voltage using external resistors, and also control the reset timing with a timeout function and external capacitor.

In terms of practical application, the XC6121F528MR-G is typically used in embedded systems and system on chips, where the power-on reset, monitors the operating supply voltage, and provides reset signalling to good operating conditions. It is also used in micro-controllers, DSPs, and various types of ASICs for reset or for powering down functions.

The working principle of the XC6121F528MR-G involves using an internal voltage regulator to compare the operating supply voltage against the preset threshold voltage. The difference between the two voltages is amplified by an internal error amplifier which drives the reset output. To maintain the preset reset threshold over temperature variation and process variation, the XC6121F528MR-G features an automatic threshold control circuit which adjusts the reference voltage in accordance with the temperature and process variation.

In addition, by attaching an external capacitor to the reset pin, the reset timeout period is determined. If the system fails to enter into operating condition within the specified timeout period, then the reset output is activated and the system is reset to a known-good state. This ensures that the system is ready for use after reset.

To conclude, the XC6121F528MR-G is a single channel voltage monitor and reset generator ideal for power management control in various embedded systems. It provides a preset threshold voltage for monitoring the operating supply voltage and reset signalling when the operating voltage falls below the preset threshold voltage. The XC6121F528MR-G is also capable of adjusting the reference threshold voltage with temperature and process variation, and controlling reset timeout with an external capacitor. As a result, it can be used for reliable power management control in various embedded systems and system on chips.

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