TL431LI-Q1: IKA clarification regarding

Abinaya C

Part Number: TL431LI-Q1

Tool/software:

Hi Team

I need some clarification.The cathode current IKA mentioned in datasheet is only the current consumed by regulator or it includes the load current.IKA_min =0.6mA for this part

4 months ago

0 Joshua Garcia 4 months ago

TI__Expert 7630 points

Hi Abinaya,

The Ika max includes the load current as when the load is off that current will go though the device. Yes the minimum current for the TL431LI-Q1 to provide proper regulation is 0.6mA.

Thanks,
Joshua

0 Abinaya C 4 months ago in reply to Joshua Garcia

Prodigy 60 points

Thanks for you response Joshua
Sorry I didnt get you.
My question is consider load current is 0.6mA,so the input resistor should designed by allowing 1.2mA (i.e. for 0.6mA cathode current for regulation and 0.6mA load current) or else input resistor designed for 0.6mA is sufficient

0 Joshua Garcia 4 months ago in reply to Abinaya C

TI__Expert 7630 points

Hi Abinaya,

Thank you for your clarification, Yes you are correct. Given a load of 0.6mA you would need to design the input(supply) resistor to provide 1.2mA of current for the TL431LI-Q1 to have proper regulation at all times.

Thanks,
Joshua

0 Abinaya C 4 months ago in reply to Joshua Garcia

Prodigy 60 points

Thanks Joshua

0 Joshua Garcia 4 months ago in reply to Abinaya C

TI__Expert 7630 points

Hi Abinaya,

Happy to help!

Thanks,
Joshua

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TL431LI-Q1: IKA clarification regarding