Tutorial: Fundamentals of Power Management Systems: Constraints and Solutions

Power management systems are partitioned across fine-grained power domains to meet low-power requirements and efficient power-distribution requirements. This tutorial provides an overview of the power-management systems for scalable power domains in modern microcontrollers, including the standby controller subsystem, system startup, power- and clock-generation infrastructure, component monitoring, and power-management integrated-circuit (PMIC) interface. Additionally, concepts are presented to ensure reliable system start-up behavior under demanding power-sequencing conditions.