I have some doubt regarding the Iout(max) calculation of TPS63060 regulator. Following I refer to SLVSA92B datasheet.
BOOST mode
VIN=2.5V, VOUT=8V
In this condition, using equations 1 and 2 and the figure 7 we can get the following results:
Isw=3.1A (from figure 7)
Efficiency=0.8 (used as an assumption as suggested by the datasheet)
D = (8-2.5)/8 = 0.6875 (from equation 1)
Iout(max) = 3.1*0.8*(1-0.6875) = 0.775A (from equation 2)
However, looking at the figure 9 (red line) it seems that the maximum output current that the device can deliver in this condition is 0.35A more or less.
Why from equation 1 and 2 the results are different from the data of figure 9?
BUCK mode
In buck mode, equation 4 suggests that Iout(max) is equal to the Isw get from figure 7.
For example, at VIN = 6.5V and VOUT = 2.5V, equation 4 returns a maximum output current of 2.05A
However, from figure 9 (black line) the Iout(max) seems to be 2.7A in this condition. Why there is that difference?
Thank you in advance for the support.
Daniele