LTM4626 operating frequency setting

Hello,

the frequency is dependent from the voltage at Pin FREQ (page 4, sorry for bad resolution) :

So a direct connection between INTVCC and FREQ ends up with the highest possible frequency.

The sign in the formula does stand for parallel connection, your assumption is correct.

kind regards

Markus

Thanks for this answer.

On LTM4626 datasheet availables in Analog web site (rev B), I don't have this table. Is there another version of datasheet ?

And what is the maximim frequency ? 800KHz or 3MHz ?

Best regards.

Hello Victor,

sorry, but it looks like I ended up in the wrong datasheet due to a typo(LTM4628). Now I doublechecked that I look in the LTM4626 datasheet:

Maximum frequency is 3MHz, any frequency higher than nominal 600kHz has to be programmed with a resistor between FREQ and GND with the given formula, so far so good.
I do not see a reason why the resistor R12 between FREQ pin and INTVC should be equipped, the only mentioned way to change the frequency is a resistor towards GND.

My assumption would be the max frequency of 3MHz is selected when FREQ pin is pulled high.

Sorry again for the possible confusion!

kind regards

Markus

Hello Victor,

sorry, but it looks like I ended up in the wrong datasheet due to a typo(LTM4628). Now I doublechecked that I look in the LTM4626 datasheet:

Maximum frequency is 3MHz, any frequency higher than nominal 600kHz has to be programmed with a resistor between FREQ and GND with the given formula, so far so good.
I do not see a reason why the resistor R12 between FREQ pin and INTVC should be equipped, the only mentioned way to change the frequency is a resistor towards GND.

My assumption would be the max frequency of 3MHz is selected when FREQ pin is pulled high.

Sorry again for the possible confusion!

kind regards

Markus

thanks for this informations.

Best regards