SLVSB64I November 2011 – March 2018 TPS65217
By default, power-down sequencing follows the reverse power-up sequence. When the power-down sequence is triggered, STROBE7 occurs first, and any rail assigned to STROBE7 is shut down. After a delay time of DLY6, STROBE6 occurs, and any rail assigned to STROBE6 is shut down. The sequence continues until all strobes have occurred and all DLYx times have been executed.
In some applications, all rails may be required to shut down at the same time with no delay between rails. Set the INSTDWN bit in the SEQ6 register to bypass all delay times and shut-down all rails at the same time when the power-down sequence is triggered.
A power-down sequence is executed if one of the following events occurs:
When the device goes from the ACTIVE to the OFF state, any rail not controlled by the sequencer is shut down after the power-down sequencer is complete. When the device goes from the ACTIVE to the SLEEP state, any rail not controlled by the power-down sequencer stays in its present state.