The TPS79901 version of the IC is able to be used in the following application:
Vin = 5V
Vout = 1.8V
Iout = 200mA
WEBENCH is able to produce this application.
But if I use the TPS79918 (fixed version of the part), WEBENCH states that the device will not work. I do not believe that this is correct. Can you verify and explain why the fixed version will not work at the same voltages as the adjustable version?
Thanks for your help with this!
Richard Elmquist