LM5069: Minimum capacitor value for TIMER pin

franziskus

Expert 8339 points

Part Number: LM5069

Team,

can you state the minimum capacitor value that can be placed on the TIMER pin (Ctimer)?

Thanks

over 5 years ago

0 Rakesh over 5 years ago

TI__Guru** 105661 points

Hi,

You can leave TIMER pin OPEN to set minimum possible fault time.

Best Regards, Rakesh

0 franziskus over 5 years ago in reply to Rakesh

TI__Expert 8339 points

Thanks for your reply Rakesh!

My customer is using a 470pF cap. They used this value to limit the impact on the power-up time (470pF = 500usec).
In our example we use 150nF (150nF = 100msec).

I cannot find a minimum specification value anywhere for the cap.
Is 470pF ok to use?

Thanks

0 Rakesh over 5 years ago in reply to franziskus

TI__Guru** 105661 points

Hi,

Yes, it is ok to use 470pF as timer capacitor.

Best Regards, Rakesh

0 franziskus over 5 years ago in reply to Rakesh

TI__Expert 8339 points

Thanks Rakesh!

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LM5069: Minimum capacitor value for TIMER pin