While working on my first voltage regulator circuit I got stuck at calculating the inductor value... The IC is LM5143A-Q1 from Texas Instruments, and according to the datasheet, the formulas for calculating the required inductance are these:
I'm not sure what I_L(peak), I_OUT, and ∆I_L mean, nor how we can find them... I assume I_OUT is the maximum output current that it will need to provide, but don't know what the other two are. How can we find the 3 variables mentioned above? Are there any formulas?
At mouser, most inductors only include values like max DC current/resistance and saturation current (other than their actual inductance). If it helps, the other factors in the L_O Equation are known. V_OUT = 7.4V, V_IN =50V, F_SW (Swithcing frequency) = 100kHz
Also, what do they mean by "choose a buck inductance such that the inductor ripple current, ΔI_L, is between 30% to 50% of the maximum DC output current at nominal input voltage"?