XC6121A721ER-G

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Power Management (PMIC) plays a critical role in the efficient operation of electronic systems. It serves two primary purposes: providing power conditioning to supply the voltage and current needed by peripheral devices and managing the system’s power consumption by optimally distributing available supplies and consuming excess energy. Power Management Integrated Circuits (PMICs) are specialized integrated circuits that are used to manage and monitor voltage and current supplies, as well as related onboard system functions such as power sequencing, fault protection and management of over-temperature conditions. PMICs provide more powerful, optimized systems performance than basic two-chip regulator topologies by integrating multiple power management and support functions as well as features for system monitoring, optimization and protection.

The XC6121A721ER-G is an advanced device in the PMIC – Supervisors family which supports the powering of microcontrollers and provide sophisticated power-on sequence and reset control functions. This device provides robust protection against numerous faults using on-board protection mechanisms like under-voltage protection (UVP), over-voltage protection (OVP), over-current protection (OCP), over-temperature protection (OTP) and watchdog. It also has various output voltage ranges and provides accuracy to ±2.5% of the set voltage.

The XC6121A721ER-G is optimized to provide power sequencing of microcontroller and other peripheral devices by handling the step-up processes for powering the processor, RAM and other peripherals. It acts as a power supervisor for resetting microcontrollers and controller, monitor system voltage and trigger an interrupt if voltage threshold is exceeded due to an overload, short-circuit or over-temperature. It also features a pre-bias output for powering up the supply voltage but can\'t be used for pre-bias condition during turn-off.

The XC6121A721ER-G has a wide operating temperature range from -55°C to +125°C, extended battery life and is highly reliable. It is suitable for functional safety and secure application and meets the requirements of UL/IEC/EN/JIS standards.

The XC6121A721ER-G works with the help of an on-board oscillator to provide a clock signal to the Power Management Unit (PMU). The PMU has four primary functions: power sequencing, voltage accurate setting, over-voltage protection, and reset control. The PMU also includes several protection circuits such as UVP, OVP, OCP and OTP, which helps to protect the components from certain levels of fault conditions.

During power-up, the power sequencing regulates the optional Power-up Sequence (PUS), which regulates the power-up moment for the microcontroller, RAM and other peripherals. For example, when the voltage reaches 3.3V, the PUS will activate and push the RAM to power-up first, followed by the microcontroller, and other active supply peripherals afterwards. This ensures that any active peripheral is successfully powered before the microcontroller starts its operation. The voltage accurate setting of the XC6121A721ER-G is adjustable from 0.7V to 5V and provides an accuracy of ±2.5%.

The XC6121A721ER-G also features a watchdog timer, reset control and over-voltage protection. The watchdog timer is responsible for monitoring system runs and checking for any abnormal behavior. If the watchdog timer perceives any abnormal behavior in the system, it will terminate the current program and perform a reset process. By this method, the system can recover from errors caused by a system reboot. The over-voltage protection in the XC6121A721ER-G is capable of cutting off the power supply when an extraordinary level of voltage is detected, to protect the components from being damaged.

The XC6121A721ER-G is an advanced PMIC – Supervisors device, which provides power sequencing and reset control with extended battery life and high reliability. It is suitable for functional safety and secure applications and can handle different voltage requirements. It also provides multiple levels of protection to system components with its UVP, OVP, OCP and OTP protection circuits. The XC6121A721ER-G is a reliable and sophisticated device for powering microcontrollers and peripheral devices.

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