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TLV758P: About the startup waveform

Part Number: TLV758P
Other Parts Discussed in Thread: MULTIPKGLDOEVM-823,


I test the TLV75801PDBVR on MULTIPKGLDOEVM-823 board. And I use the typical application, set input and output capacitor 0.1uF+1uF+10uF ceramic capacitors, and use R1=11K, R2=25K to set output voltage 1.8V. 

I use input 2V, 3.3V, 5.4V test load 0A, 0,25A and 0.5A, find that the output waveform of LDO have a back groove, at the same time the input voltage has reached the turn-on voltage.

I have change the input and output capacitors but the groove always exist.

Please  see the attachment for waveform.tlv758P.xlsx