TPS62840: Datasheet start up and shutdown waveform on P.27 Fig 50

Hello Kohei-san,

The difference you can observe, between Figure 48 and 50 is that VIN is already set and EN is then turned-on for Figure 48.

For Figure 50 VIN and EN are tied together, the system needs a longer time to set up before device start switching.

Thank you very much for your valuable feedback!

Best Regards,

Dorian

Dorian-san,

Thank you for your reply.

From your answer, I could understood several internal setup time is needed from VIN is added until internal circuit becomes operable.

Would you tell me that setup time value? Is it about 10ms?

The start-up delay by EN control is on the datasheet EC table(200us).

Best Regards,
Kohei Sasaki