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TPS782: delay before entering in current limit mode

Eric Dj
Expert 4130 points
Part Number: TPS782

Team, for this design, a load of 350mA will be applied to the TPS782 for about 10ms. This is due to the fact that the load will be periodically switched off/on the LDO to save the energy & the LDO will be providing the additionnal current needed to charge the capacitor. The TPS782 is designed to enter into current limit mode for load current above 150mA. How fast is this control loop? Can we operate the device with this 350mA/10ms condition? rgds, Eric

  • 0
    TI__Guru 55940 points
    Hi Eric,

    It is not recommended to continually run an LDO into current limit. Please keep in mind that an LDO will only supply the current demanded by the load; therefore, an LDO with a higher current rating could provide more reliable solution for your application.

    Could you clarify, is the load or the LDO being periodically disabled?

    Very Respectfully,
    Ryan
  • 0 in reply to Ryan Eslinger
    TI__Expert 4130 points
    thanks Ryan. It is the load being periodically disabled. The peak current comes from the charge of the external capacitor. The customer is investigating the potential use of a higher current rated LDO. rgds, Eric
  • 0 in reply to Eric Dj
    TI__Guru 55940 points
    Hi Eric,

    From your description another LDO with a higher current rating will be better suited for your application. Please let us know if you need help selecting another LDO.

    Very Respectfully,
    Ryan