I am performing a design with the LMR34206-Q1 with the following requirements:
- Input voltage: 8,6V to 18V. Up to 42V in transient
- Output voltage: 5V
- Max. Output current: approx. 250mA
I hope you could clarify some design concepts:
- K: what exactly this ripple factor referring to?
- When using the equation to select the inductor, it uses Maximum output current. Do I need to consider as well minimum current? The inductor value coming from the equation would be bigger then...
- My results are giving me so far.
- Condition with equation 4: 0.66uH min
- Condition with equation 3: 3.58uH min with K = 0.4 and Vin max = 18V
- Are we safe as long as the inductor value >3.58uH? I selected 10uH
- My results are giving me so far.
- For selecting the output capacitance:
- What means AVout? Is this the maximum variation of the output voltage we target independently of the consumption?
- What means AIout? Is this the maximum difference in current we can have at the output?