Hello, I was finding Step-Down Regulator for low Voltage.
I was check MP2122 Chip. It can make generates an output voltage as low as 0.608V.
Can I make 0.9V output from adjusting the resistance value?
If is OK, Can you Recommend use Inductor Value?
Yes you should be able adjust the resistor value to get 0.9V. Please use to expression below to choose you resistor values.
The rule of thumb for selecting inductor value is 1.25 times the load current value.
Hope this helps, let me know if you have any other questions.