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TPS62110 Vout variation in ext. sync operation

Genius 4220 points
Other Parts Discussed in Thread: TPS62110, TPS62140, TPS62160

Hi,

I found the phenomenon in TPS62110 as follows,

When I change the operation mode from fixed PWM to ext clock sync(1MHz) during normal operations,

The vout slightly changed as attached waveforms. sometimes rose, sometimes dropped.

Does this phenomenon are associated with the internal circuit that  improves load transient response?

(I saw another questions in E2E and found that the circuit has a finite number of digital steps available to set the output voltage.)

Thanks,

Go

TPS62110 Vout variation.ppt