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ATL431LI: For Li battery in 3.3V out application

Intellectual 1130 points

Replies: 2

Views: 76

Part Number: ATL431LI

Hi team,

I want to use ATL431LI to achieve a li battery in(3.7 to 4.2V) 3.3V out application, the load is BQ32000.

Does this circuit work? What is the min dropout voltage of this circuit?

  • Hi Jeff,

    It is possible to use a ATL431LI to do this conversation. You will need to size the bias resistor based on worst case conditions.
    The one issue is that this is very power hungry which is a concern in battery applications.
    Is there a reason you do not want to use a low power LDO or a device like the REF3333?

    -Marcoo

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    If you feel your thread is resolved, please selected Answered.

    If you are using the TL431, check out the new TL431LI and its low Iq counterpart ATL431LI for improved system performance in a p2p package.

    Check out: Designing with the improved TL431LI for how to calculate worst case error on all '431 devices.

    Check out: Designing with the ATL431LI in Flyback Converters for tips and tricks on how to lower standby Iq to meet DoE and CoC regulations.

  • In reply to Marcoo Z:

    Hi Marcoo, just want to try a low cost solution.

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