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Sync ADP5054 switching frequency to clock ranging from 500 KHz to 880 KHz?

Question asked by Lionelwallace Employee on Oct 1, 2015
Latest reply on Oct 8, 2015 by Lionelwallace

Regarding the ADP5054.

 

We have to be able to Sync to an external clock with a range of 500kHz to 880kHz. Per page 16 of the datasheet.

 

Note that the internal switching frequency set by the RT pin must be programmed to a value that is close to the external clock value for successful synchronization; the suggested frequency difference is less than ±15% in typical applications.”

 

Depending on what “typical applications” means, it looks like I can not sync over such a large range.  I can not find any more in depth info on this.  What I have to do is power up without a Sync input and then dynamically change over to our pulse rate once the “mission” starts.  Can I use this part over this range?    Looks like I would need to set around 680 kHz and sync over a +/-30% range.  

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