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Q&A LTC6948 non-simultaneous 3.3V and 5V

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LTC6948 non-simultaneous 3.3V and 5V

tpairon on Aug 17, 2021

Hi,

Is it mandatory to power up the PLL LTC6948 with 3V3 and 5V at the same time?

In other words, can we reset one of the supply while the other is still on?

Thanks,

Thomas

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+1 ChrisPearson

on Aug 23, 2021 3:28 PM 3 months ago
Its not mandatory. As a best practice, I usually recommend powering up the lower voltage supplies first, and then powering down higher voltage supplies first - for any part. The LTC6948 datasheet's absolute maximum table allows for powering up either supply first.
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+1 ChrisPearson

on Aug 23, 2021 3:28 PM 3 months ago
Its not mandatory. As a best practice, I usually recommend powering up the lower voltage supplies first, and then powering down higher voltage supplies first - for any part. The LTC6948 datasheet's absolute maximum table allows for powering up either supply first.
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