SLVSCO4D July 2015 – February 2019 TPS65917-Q1
The Step-down converters, SMPS1, SMPS2, or SMPS1&2 and SMPS3, are DVS-capable and have some additional parameters for control. The slew rate of the output voltage during a voltage level change is fixed at 2.5 mV/μs. The control for two different voltage levels (roof and floor) with the NSLEEP, ENABLE1, and ENABLE2 signals is available. When the roof-floor control is not used (ROOF_FLOOR_EN = 0), the CMD bit in the SMPSx_FORCE register can select two different voltage levels.
Below are the steps for programming two difference output voltage levels (roof and floor) for the DVS-capable step-down converters:
Figure 5-13 shows the SMPS controls for DVS.