In the datasheet, Figure 10-58. "Schematic for Output Voltage Tracking", an application circuit is provided for tracking a second supply voltage from a main supply voltage using the SS/TR pin and resistive voltage divider. My question is how would one track a third supply, in addition to the second supply, from the main supply? My concern stems from the p.16 datasheet statement, "The SS/TR pin must not be connected to the SS/TR pin of other devices".
In my design, I use three different part variations of TPS6281x-Q1 family, all in fixed PWM mode. The main D3.3V output drives two other converters' inputs (creating D1.1V and A1.15V supplies) and I am trying to optimize my ramp up/down timing as much as possible. Currently, I am not using any tracking method beyond tying the main D3.3V converter's Power good signal to drive the second and third converters' EN input pins and all SS/TR pins connect a C=4700pF to ground. Below is my current connection diagram.
