I'm trying to sum up the minimum current draw for all devices fed by a buck converter in order to determine the necessary inductance value. The max current is typically easy to find on datasheets, but I'm having trouble getting values for minimum current. For instance, the datasheet for the LTC2292 ADC specifies a max current of 95mA and a typical current draw of 78mA, but leaves the min column blank. I could play this safe and take of min current of 0A, but that heavily constrains the inductance value I can use and seems very unrealistic. Is it safe to take the typical value as the minimum current? Or, is there some other way to estimate this?
I'm seeing multiple answers to the question of how to choose an inductor for a buck converter use a 10% rule, where the current in question seems to be max current, although is not always specified. For instance, this answer explicitly states 10% of max current and this other answer also uses 10%, but does not explicitly state whether it is in reference to max current or typical current. Is it safe to use 10% of either max or typical current for choosing the inductor, rather than worrying about the actual minimum current draw?