ADP7159..ADM7155 REF_SENSE pin

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 (I_MARGIN) at the REF_SENSE pin.

V_OUT = V_{REF_SENSE} + V_{R_TOP} ± ∆V_MARGIN

Since V_{REF_SENSE} is constant, the change in output voltage (∆V_MARGIN) is dependent in I_MARGIN and R_TOP.

∆V_MARGIN = I_MARGIN x R_TOP

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

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 (I_MARGIN) at the REF_SENSE pin.

V_OUT = V_{REF_SENSE} + V_{R_TOP} ± ∆V_MARGIN

Since V_{REF_SENSE} is constant, the change in output voltage (∆V_MARGIN) is dependent in I_MARGIN and R_TOP.

∆V_MARGIN = I_MARGIN x R_TOP

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.

ltspice_ADP7159_EZone_2020_0220.zip