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Original question:

SN6501: Low no-load current for isolated 5V supply

ISOW7844: Load current

Deepa Sivan
Prodigy 20 points
Part Number: ISOW7844
Other Parts Discussed in Thread: ISOW7721

We require a digital isolator with integrated dc-dc converter with a load current of 200-300mA. Will ISOW7844 do the job?

Does ISOW784x 5 V to 3.3 V require a minimum load of 130mA?

  • +1
    TI__Guru 51510 points

    Hi Deepa,

    Thank you for reaching out.

    ISOW7844 doesn't support a load current of 200-300mA and it can only support an output current of 130mA. The datasheet states that the minimum load current we guarantee is 130mA which means that any current >130mA is not guarantee and hence, you should consider using the device for currents upto 130mA for reliable guaranteed operation.

    ISOW78xx family is our first-generation device. We now have the second-generation family, ISOW77xx, which we recommend you to use. The device ISOW7721 (2-channels) is unique from rest of the family and supports connection of multiple outputs together to achieve higher output current capability as shown below. With about 3 device outputs connected together, you will be able to support an output current of 200-300mA. Let me know if you have any questions, thanks.


    Regards,
    Koteshwar Rao