TPS61288: Maximum current limit when device is disable

Hi Mike,

The maximum current depends on thermal performance of customer's board. When used in this way, the power consumption is VD*Iout, VD is voltage drop of high-side MOS, Iout is output current. I do not have a EVM at hand, otherwise I can test the VD for you. When you know the VD and set Iout, you can test the thermal resistance of your board. For example, if VD is 0.5V, Iout is 2A, the temperature will rise about 33.6° after about 30mins on EVM. Once you know the thermal resistance, you can calculate the maximum current capability according to the temperature rise the system allows.

By the way, may I know why customer want to use 61288 like this?

Hi Yichen,

Thanks for your reply, the do not intend to boost the Vout voltage when they don’t need it, but still need to maintain a certain voltage at the output. 

Best regards,

Mike

Hi Mike,

We have low Vin Boost like TPS61022 that support pass-through function. It seems that we can develop this function in MV boost since I get another similar question. Thanks for your information. Is early reply clear for you?