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LTM4648 Sync capability

Hi,

I have seen in the LTM4648 datasheet that the range of frequency sync is from:

Oscillator and Phase-Locked Loop

SYNC Capture Range

250

650

kHz

 

But in another section of the datasheet is written:

"For switching noise-sensitive ap­plications, it can be externally synchronized from 350kHz to 650kHz"

Please confirm what is the sync frequency input range.