TPSM33625: When I connect a 15Kohm from SYNC pin to GND , what will happened.

Hi,

Since TPSM33625FRDNR is a Fixed Frequency variant, according to the below table if the SYNC pin is grounded then the device will get into Auto mode at light load.

Thanks,

Pramanik Patel

Hi TIer

The customer's synchronization frequency SYNC signal is only set after power up, that is, the SYNC signal appears after the chip enters auto mode. Will the chip switch to external sync mode at this time? Is this timing required? 

Hi,

Can you please clarify the following:

Initially the syn pin will low for some time, once the clk is ready, sync will get the clock and the buck must work with the sync clock. Right?

Thanks,

Pramanik Patel

Hi Pramanik

Yes. Are there some timing constraints? 

Hi,

One way is to delay the EN pulse to buck converter, the delay can be given such that the clk generator is ready with the clock, and then buck is enabled.

Thanks,

Pramanik Patel

Hi

OK understood. so first need have sync clock, then chip enabled will go to external sync mode?

In other words, when the chip enable has detected its operating state, will it not switch after that? This feature is not dynamic. right?