JAJSEF7G December 2014 – February 2019 TPS659037
PRODUCTION DATA.
In POWERHOLD mode, the acknowledge of the power on is achieved through a dedicated pin, POWERHOLD. Upon receipt of an ON request, the TPS659037 device initiates the power-up sequence and asserts the RESET_OUT pin high when it is in the ACTIVE state (reset released). While in the ACTIVE state, the device remains active for 8 s and then automatically shuts down. During this time-frame, to keep the device active, the host processor must assert and keep the POWERHOLD pin high. If the POWERHOLD pin is then set back to low, it is interpreted as an OFF request by the TPS659037 device.
Figure 5-21 shows the POWERHOLD mode timing diagrams.