At datasheet of TPS54240-Q1 is mentioned(32 page), An input voltage ripple is 206mV under Ioutmax = 2.5A, Cin = 4.4uF, Fsw = 300KHz.
Vin ripple = (Ioutmax x0.25) / Cin x Fsw (Equation 39)
But i can't get a answer of 206 mV, I got a result, 470 mV. Please let me know if I make a mistake.
Please comment on this.