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ADP6107 Vin >Vout behavior


I have a customer that would like to know  what happens when Vin is higher than Vout. Some regs turn the high FET ON so it passes DC through… some turn off and block DC?



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  • Fil,

    Could you elaborate on the VIN > VOUT behavior on the LTC3528? The datasheet indicates "Note that the efficiency is much lower in this mode, and the maximum output current capability will be less. Refer to the Typical Performance Characteristics" 

    I see one chart ("Maximum Output Current vs VIN") that I can use to estimate the output current when VIN >VOUT, but I can't see how to estimate the efficiency hit. Do you have more info on this, or is it possible to simulate in LTSpice?