Hi,
I want to configure the output voltage by FPGA through a ADC.
LM1086 is used in the previous design. Due to the LM1086 adjustable version develops at 1.25V reference voltage, Vref, between the output and adjust terminal.
Thus, I use the ADC's output to set the adjust terminal voltage with a voltage divider.
Vout = Vadj + Vref+Iaj*R (Iadj is small can be ignored)
However, because of the Vref =1.25V. Thus, the min Vout =1.25V.
In my requirements, the min value is 0.8V.
Do you have other component that can solve this problem?
I searched many regulator, they all have a feedback voltage regulated with output.
LM1086 is the special one, that have a fixed reference voltage between Adjust and output terminal.
Thanks for your help.