SLVSDE7C November 2016 – September 2020 TPS22976
A capacitor to GND on the CT pins sets the slew rate for each channel. To ensure desired performance, a capacitor with a minimum voltage rating of 25 V must be used on either CT pins. An approximate formula for the relationship between CT and slew rate is shown in Equation 4, and this is valid for TPS22976 and TPS22976N. The TPS22976A has a faster rise time and is represented by Equation 5.
Rise time can be calculated by multiplying the input voltage by the slew rate. Table 10-2 shows rise time values measured on a typical device. Rise times shown below are only valid for the power-up sequence where VIN and VBIAS are already in steady state condition, and the ON pin is asserted high.
|CT (pF)||RISE TIME (µs) 10% - 90%, CL = 0.1 µF, CIN = 1 µF, RL = 10 Ω(1)|
|5 V||3.3 V||1.8 V||1.5 V||1.2 V||1.05 V||0.6 V|