Hi,

I am currently working with the TPS53681 IC in a design related to LS2088A. I have got a reference design from TI website. Upon going through the datasheet of the PWM TPS53681 I have found that TI has recommended a power on sequence and power down sequence for the power rails 3.3V, 5V, 12V and enable. As per my design I may not meet this power sequences because I am deriving the 5V and 3.3V from the 12V power rail. So as per my design the power rails reach the IC in the Controller and power stage in the order mentioned below.

1. 12V

2. 5V

3. 3.3V

then enable signal will be released.

As per my design measuring of the input current is not required.

So please let me know whether the sequence is acceptable or need to follow the one recommended in the datasheet.