JAJSFU4 July 2018 TPS650861
PRODUCTION DATA.
The power-down sequence can follow the CTLx pins, or be controlled with the I2C commands. If the internal PGs are used for sequencing or if some rails need to ramp down before others a delay can be added to the deassertion low of the internal enable of the subjected rail. This delay can be independent of the power-up delay option. Thus, power-up and power-down sequences can be different or similar to match the specific application sequences required.
Refer to Figure 5-11 for an example of a power-down sequence demonstrating the delay disable of BUCK1 and BUCK2.