Q: TPS62290 feedback divider R1 and R2 by 687520
In order to set Vout = 1.5V the datasheet recommends to use R2=180k and R1=270k. Is it possible to use R2=120k and R1=180k?
Are there any disadvantages, except higher current thru the divider, to expect?
A: TPS62290 feedback divider R1 and R2 by 1090425
This is ok but will give slightly lower efficiency at very very light loads where the divider current becomes a significant portion of the load current. I would recommend optimizing the Cff per this app note: http://www.ti.com/lit/an/slva289/slva289.pdf You can start with a 33 or 47 pF.
There is also the newer TPS62060 which might give a smaller solution size and better high load efficiency.
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