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TPS22965-Q1: 3.3V operation

Part Number: TPS22965-Q1

Hi,

We got a question from customer about TPS22965-Q1.
Could you help us?

[Question]
They consider to use the IC at 3.3V power supply. But there is not any data in datasheet. Could you provide below data?

 - Condition -
 Vin=Vbias=3.3V

 - Data -
 Ron@1.8A
 ton
 toff
 tr
 tf
 td

Best Regards,
tateo

9 Replies

  • Hi Tateo,

    I will take these measurements and will get back to you by next week.

    Thanks,

    Alek Kaknevicius


    To find the latest information on Power Switches, visit www.ti.com/powerswitch

  • In reply to Aleksandras_Kaknevicius:

    Thank you for your support. I look forward to your feedback.

    Best Regards,

    tateo

  • In reply to Aleksandras_Kaknevicius:

    Hi, We got additional question from customer. Could you help us?

    - How much is the recommended maximum output capacitor value? They are concerned about exceeding Tj rating by discharge current.
    In case of TPS22918-Q1, external resistor Rext is required in Cout>200uF.

    Best Regards,
    tateo

  • Hi Tateo,

    Please find the requested data below. This was taken without a CT capacitor.

    VBIAS=VIN=3.3V, IOUT=1.8A

    RON 19.7mΩ
    tON 248us
    tOFF 7us
    tR 243us
    tF 4.5us
    tD 150us

    Let me know if you have any questions.

    Thanks,

    Alek Kaknevicius


    To find the latest information on Power Switches, visit www.ti.com/powerswitch

  • In reply to tateo yamashiro:

    Hi Tateo,

    Could you help provide some information on the application for us to determine whether or not this would be feasible? We would need:

    • Input voltage (3.3V?)
    • Output current (1.8V?)
    • Temperature range
    • Desired output capacitance
    • QOD resistance, if a specific resistance is needed

    The maximum capacitance will vary depending on the above information. Since 1.8A is already close to the maximum current for the device, it may be difficult to support a large output capacitance. In the case, the TPS22965-Q1 would be the safer choice.

    Thanks,

    Alek Kaknevicius


    To find the latest information on Power Switches, visit www.ti.com/powerswitch

  • In reply to Aleksandras_Kaknevicius:

    Thank you for your support.
    And sorry for confusing you. They want to know the recommended maximum output capacitor of TPS22965-Q1. I'd appreciate it if you could answer this question.

    Best Regards,
    tateo

  • In reply to tateo yamashiro:

    Hi, I'm sorry I didn't make it clear enough. Their condition is under the below.

    Vin=3.3V
    Iout=1.8A
    Ta=95C max
    Desired output capacitor=242uF

    They would like to make sure the recommended maximum output capacitor of TPS22965-Q1. They are thinking output capacitor range is limited by Rpd.

    Best Regards,
    tateo

  • In reply to tateo yamashiro:

    Hi Tateo,

    Thank you for the clarification. The output capacitance of 242uF should not cause any issues for this application.

    Thanks,

    Alek Kaknevicius


    To find the latest information on Power Switches, visit www.ti.com/powerswitch

  • In reply to Aleksandras_Kaknevicius:

    Hi, Thank you for your support. We understand 242uF should be ok for their application. And they want to know the recommended maximum output capacitor value. Is there reference value?

    Best Regards,
    tateo

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