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TPS62170: TPS62170 Feedback Resistor Choice

Part Number: TPS62170

Hi Team,

Recently my customer is designing the TPS62170. 

Input: 4-16V. typ: 8V

output: 3.5V, Iout max: 0.3A.

Based on the webench design, I can get below design. for the feedback resistor, it suggested: 180k & 604k.

However, according to my customers design requirement, they cannot use the 100k ohm resistor or value above 100k. 

So they'd like to check whether 20K & 68K can be used to replace the original design. 

Their design is as below. (PG function is not required).