TPS62230: Inductor current at startup

Hello Dice,

Thank you for Reaching out. Can you please edit the part number to TPS62231, because the output voltage of TPS62230 is 2.5V. It seems you are using TPS62231.

Since the startup time is very less for this device, you can expect the high inductor current during start-up, but 900 mA looks too much, I did the measurement with TPS62231EVM (TPS62230EVM-574 USER'S GUIDE (Rev. A) (ti.com)).  but i didn't find that much inductor current. Please refer my measurements.

The inductor current during the device start up depends upon the output capacitor and load as well. I assume that it's a no- load condition. Higher the output capacitor, larger the inductor current to charge the output capacitor because the soft start time is already fixed.

Please share your schematic. with the part values.

Thank you,

Regards,

Moheddin.

Hello Dice,

As you shared your schematic privately, I checked it and did not find any concern. You also mentioned that your load at start-up is 0.08A. Can I know what the load is and are there any external capacitors across the load which are not shown in the schematic?

From the device perspective there will be no problem, since it has current limit protection, just make sure that the inductor you are using can handle the current during start up.

Thank you,

Regards,

Moheddin.