SLVSDF3F MARCH 2017 – JANUARY 2019 TPSM846C23
The TPSM846C23 device implements the TOFF_FALL command to define the time for the output voltage to drop from regulation to 0 as shown in Figure 16. Negative current in the TPSM846C23 device can occur during the TOFF_FALL time to discharge the output voltage. The setting of the TOFF_FALL command to 0 ms causes the TPSM846C23 to bring the output voltage down to 0 as quickly as possible, which results in an effective TOFF_FALL time of 1 ms (fastest time supported). The time is factory-set to 3 ms. This feature can be disabled in the ON_OFF_CONFIG command for the turnoff controlled by the CNTL pin or bit 6 of the OPERATION register if the regulator is turned off by the OPERATION command. If the regulator is turned off by the OPERATION command, both the high-side and low-side FET drivers are turned off immediately, and the output voltage is discharged only by the load.