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TPS63900: Issue with the Operation at Low Voltage <2.4V with max. 60mA current

Part Number: TPS63900

Hi TI Team,

We have used TPS63900DSKR Buck-boost convertor for one of our Lowest power 1S2P LiMnO2 battery operated product.

Our input requirements is 1.8V to 3.25V and used TPS63900DSKR Buck-boost convert which convert it to 3.3V for system Power.

We have received the board and testing with High Voltage(3V) to Low voltage(1.8V) with <60mA current but after 2.4V, output voltage 3.3V is going to drop to 0.5V.

So, Can you please verify the attached Schematic and Layout image and help us to solve this issue?

Looking for your support to solve this issue.

Thanks & Regards,

Nilav Choksi