Power categories in ASIC design (Design Compiler)
Switching power:
- The power needed to charge and discharge the capacitance of the gate during activity.  It will roughly scale with frequency. This includes the "shoot through" current.

Internal power:
- power that is consumed by circuits that have bias circuits or that discharge , for example- dynamic elements (which is separate from leakage power even if it is similar in nature).
- This also includes IR drops from power rail routing.