Is ADP7159 (or ADP7157, .. ADM715*) REF_SENSE pin driven by external DAC acceptable?
I wanto control the voltage with a SPI/DAC.
like https://ez.analog.com/power/f/q-a/100035/lt3090-output-voltage-controlled-by-dac
ADP7159
Recommended for New Designs
The ADP7159 is an adjustable linear regulator that operates from 2.3 V to 5.5 V and provides up to 2 A of output current. Output voltages from 1.2 V to...
Datasheet
ADP7159 on Analog.com
ADM7155
Recommended for New Designs
The ADM7155 is an adjustable linear regulator that operates from 2.3 V to 5.5 V and provides up to 600 mA of load current. Output voltages from 1.2 V to...
Datasheet
ADM7155 on Analog.com
ADP7157
Recommended for New Designs
The ADP7157 is an adjustable linear regulator that operates from 2.3 V to 5.5 V and provides up to 1.2 A of output current. Output voltages from 1.2 V...
Datasheet
ADP7157 on Analog.com
Is ADP7159 (or ADP7157, .. ADM715*) REF_SENSE pin driven by external DAC acceptable?
I wanto control the voltage with a SPI/DAC.
like https://ez.analog.com/power/f/q-a/100035/lt3090-output-voltage-controlled-by-dac
Hi,
Controlling the output of ADP715x and ADM715x linear regulators using an external DAC is possible. You can control the output voltage to your desired value by adding/subtracting a margining current (IMARGIN) at the REF_SENSE pin.
VOUT = VREF_SENSE + VR_TOP ± ∆VMARGIN
Since VREF_SENSE is constant, the change in output voltage (∆VMARGIN) is dependent in IMARGIN and RTOP.
∆VMARGIN = IMARGIN x RTOP
Below are some related readings regarding this method.
https://www.analog.com/en/technical-articles/voltage-margining-made-easy.html
https://www.analog.com/media/en/technical-documentation/data-sheets/LTC7106-1.pdf
https://www.analog.com/media/en/technical-documentation/data-sheets/292012fa.pdf
Regards,
Errgy
Thank you for your reply.
If you find any problems, please point out, thank you.
Thank you for your reply.
If you find any problems, please point out, thank you.