Hello, I would like to get clarification on the maximum total output current shown in the TPS82740B datasheet.
I am using the TPS82740B to generate Vout = 3.3V from Vin = 4.0V. I am also using the load switch to control a separate 3.3V rail.
Section 7.3 of the datasheet specs maximum Iout + Iload as follows:
Voutnom + 0.7V <= Vin <= 5.5V max = 200mA
Voutnom <= Vin <= Voutnom + 0.7V max = 100mA
Both of these are true in my case, so I don't know if my maximum is 200mA or 100mA or somewhere in-between. It seems like the spec is trying to say that if you don't have at least 0.7V of headroom then you can't source 200mA, but I don't know why there would be an abrupt drop from 200mA to 100mA. To add to the confusion, all of the efficiency curves run to 200mA (no derating for any Vin/Vout combination).
Thanks for any feedback.
- Jason