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ISOW7842: For setup application

Yamuna Rasu
Prodigy 60 points
Part Number: ISOW7842

Tool/software:

Hi,

Planned to use ISOW7842DWER for input 3.3V and output 5V. Datasheet not seen any statement for this PN vs my application. Is it good to use this part for this application?

If not please confirm the exact PN.

Thanks

  • 0
    TI__Expert 7585 points

    Hi Yamuna,

    Thanks for reaching out.

    Yes, the ISOW7842 is good to use with 3.3V Input(VCC) and 5V Output(VISO) but the performance and reliability is only guaranteed for Output Load Current IISO(Out) of 40mA.

    If your application requirement is more than 40mA of Load Current from Power Converter output then Boost Operation mode can not be used.

    Regards
    Varun

  • 0 in reply to Varun Kumar
    Prodigy 60 points

    Hi Varun,

    Thanks for confirming.

    Have another query.

    1. What is the current requirement at input side for INx and Vcc (Supply) at my requirement.

    2. Max 40mA load current at Viso?

  • 0 in reply to Yamuna Rasu
    TI__Expert 7585 points

    Hi Yamuna,

    Please find my inputs below:

    Yamuna Rasu said:
    . What is the current requirement at input side for INx and Vcc (Supply) at my requirement.

    Refer Section 7.12 in Datasheet for Supply Current Values ICC(Current at VCC) and IISO(out)(Current at VISO).

    Yes, the 40mA is the additional Load current supported by the device from VISO Pin.

    Current through INx is +/-10uA. Refer IIH and IIL specs in Section 7.11.

    Regards
    Varun