AN 692: Power Sequencing Considerations for Cyclone® 10 GX, Arria® 10, Stratix® 10, Agilex™ 7, and Agilex™ 5 Devices

ID 683725
Date 9/26/2024
Public

1.2.2. Sequential vs. Simultaneous Power-Down

Some sequencers on the market may simultaneously bring all voltage rails down instead of powering the voltage rails down sequentially.

Take care when selecting a design for controlling the sequence during a fault condition. Non-sequential power-down controllers can violate power-down specifications. External active discharge and trimming RDISCHARGE can alleviate this problem (refer to the "Fault Tolerant Block Diagram").