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Problems Simulating Boost configuration of LTC7872

Thread Summary

The user encountered issues simulating the Boost configuration of the EVAL-LTC7872-AZ in LTSpice, despite the Buck function working correctly. The problem was resolved by updating to the latest LTC7872 model, which was modified to fix boost operation issues. The user had grounded the BUCK pin and was using a 14V input to boost to 48V, but the simulation was running extremely slowly due to charging a 100μF capacitor.
AI Generated Content
Category: Hardware
Product Number: LTC7872

Hello, I simulate with LT-Spice the circuit of EVAL-LTC7872-AZ, the Buck-function is working without problems. But the Boost configuration is not working. It is not possile to boost from 14V to 48V. The values are the same as in the Eval Board. It seems that the model in LTSpice is not working well for a Boost configuration. You may have a reference Boost LT-Spice Design with the LTC7872?   Thank you and best regards Dani

Edit Notes

Fixed title, added keyword
[edited by: MStokowski at 7:40 PM (GMT -5) on 13 Nov 2025]
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