A power tree around the controller

Separate the MCU core, analog supplies, communication interfaces and always-on functions. Their sequencing and fault dependencies should be explicit rather than inferred from the schematic.

  • Map rail tolerances to the controller requirements
  • Coordinate power-good, reset and watchdog functions
  • Budget standby consumption across the whole module

Design priorities

Translate system requirements into a rail inventory, state diagram and fault-response plan. Identify dependencies between loads so that power transitions do not create unintended operating states.

  • Rail requirements and load profiles
  • Supply states, sequencing and reset relationships
  • Fault detection, containment and recovery

Engineering review inputs

Bring supply limits, load requirements and environmental constraints to the design discussion. Any compliance or validation target must be tied to a defined test method and an approved system requirement.

  • System block diagram and interface requirements
  • Operating environment and thermal constraints
  • Validation scope and acceptance criteria