SLVSFS7A March 2021 – January 2024 TPS62901
PRODUCTION DATA
A capacitor connected between SS/TR pin and GND allows a user-programmable start-up slope of the output voltage.
An internal constant current source is provided to charge the external capacitance. A typical soft-start ramp time is given by:
where
The fastest achievable typical ramp time is 150µs, even if the external Css capacitance is lower than 680pF or the pin is open. Generally, TI does not recommend lower than 1ms soft-start time for low inrush current.
The soft-start time has variation. For more accurate configuration, the below maximum and minimum formula must be taken into consideration.
where K is the related to the value of CSS, the unit is µs. The relationship curve is shown in Figure 7-3 and Figure 7-4.