SLUSCT1B June 2017 – January 2019 TPS53681
PRODUCTION DATA.
The TPS53681 device operates from 3.3-V supply at the V3P3 pin (pin 39) and the 12-V supply from the VIN_CSNIN pin (pin 38). TI recommends the following power-up and power-down sequence in order for the controller to monitor the complete power-up and power-down procedure, fault protection and fault recording. The device provides pre-start up overvoltage protection when the controller and the power stage are enabled before the 12-V input is applied.
The recommended power-up sequence is:
The recommended power-down sequence is: