Cutomer is seeing LTM4681 for VINT of AMD Versal HBM. They found leakage voltage ~160mV appears from Vout even RUN pin is GND. Why such leakage voltage happens? Is this expected behavior of micro module covering very high current? Vin=12V.
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LTM4681
Recommended for New Designs
The LTM4681 is a quad 31.25A or single 125A stepdown μModule® (power module) DC/DC regulator featuring remote configurability and telemetry-monitoring...
Datasheet
LTM4681 on Analog.com
Cutomer is seeing LTM4681 for VINT of AMD Versal HBM. They found leakage voltage ~160mV appears from Vout even RUN pin is GND. Why such leakage voltage happens? Is this expected behavior of micro module covering very high current? Vin=12V.
iulia - Moved from FPGA Reference Designs to Power Management. Post date updated from Wednesday, September 18, 2024 5:36 AM UTC to Wednesday, September 18, 2024 5:53 AM UTC to reflect the move.
Hello
I'm experiencing the same issue with my evaluation board.
Could this be due to current leaking from the LTM4681's internal circuitry through the FET's body diode or other means, causing voltage buildup in the capacitor?
Or is this due to current leakage from the evaluation board's peripheral circuitry?
I'd like to know if the LTM4681 is the cause.
Also, I think I can set this to 0V by adding a resistor of about 1 kΩ to the optional bleeder resistors R175 or R176. Is this correct?

I'd appreciate a reply.
Best Regards,
Knj