ADP6107 Vin >Vout behavior

Hi Anita, Just so we are on the same page we are talking about the ADP1607.

I didn't see anything in the datasheet that talks about what happens to the current when Vin > Vout in normal operation.

I will reach out to the product line and get back to you.

Thanks

Charly

Hi Anita, Just so we are on the same page we are talking about the ADP1607.

I didn't see anything in the datasheet that talks about what happens to the current when Vin > Vout in normal operation.

I will reach out to the product line and get back to you.

Thanks

Charly

Hi Charley,

Thanks for reply. Yep, that is correct.

Anita

Hi Anita, Charly,

It will behave as the waveforms below but you will see that at some load conditions it will behave in pass through mode, no switching, sync FET fully on. If pass through is not desired, please consider LTC3528.

Thanks very much for quick response. Much appreciated, and passed on to customer.

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?

Thanks,

Kevin

Hi Kevin,

I'm not sure if we have data readily available. I would recommended that you connect to a local ADI FAE to give you a better answer or get a demo board to try in bench. It is hard to estimate efficiency on LTSpice, but it lets you see how the functionality works.