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TPS51518: Soft-Start Waveforms

Sam Ting
Expert 3120 points
Part Number: TPS51518

Hi Team,

Could you please comment the Soft-Start waveforms are normal or not? Thanks!
The output voltage level setting are-
VID 00, V0 = 0.85V
VID 01, V1 = 0.90V
VID 10, V2 = 0.95V
VID 11, V3 = 1.00V

However, we found there are "two stages" on ramp-up. The output voltage increases to 0.85V (V0) initially, then goes to the setting level, V1, V2 or V3 by FCCM. Is it the expected behavior?

VID 00

VID 01

VID 10

VID 11

Best regards,
Sam Ting