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TPS7B4253-Q1: Output current limitation of TPS7B4253-Q1

Masami Michino
Genius 5070 points
Part Number: TPS7B4253-Q1

Dear, All

Customers have questions about TPS7B4253-Q1 'output current limitation'.

Target device: TPS7B4253-Q1
Question contents: The 'Output current limitation' on P5 of the data sheet has the following description.
Min 301 mA
Typ 450 mA
Max 520 mA
The conditions are VIN = 13.5V, VADJ = 5V, OUT short to GND, Tj = -40 to 150 deg.

How is the above value changed when VADJ = 13.5V?

* Especially customers care about Min value.


Thanks, Masami M.

  • 0
    TI__Expert 6965 points
    Hi Masami,

    When you raise the ADJ to 13.5V are you also raising the input voltage? If you do not raise the input voltage the LDO will be in dropout. It is common when LDOs are in dropout the current limit will be higher than the specified value. Could you give a little more information on the use case?

    Regards,
    Mark
  • 0 in reply to Mark Sellers
    Genius 5070 points


    Hi, Mark-san,

    I confirmed with the customer.
    They are considering using this device for the following purposes.
    a. Outputs almost the same voltage as the input voltage (voltage of Vdrop may be lowered).
    b. When the output is shorted to GND, protect it so that it does not flow more than a certain constant current.
    c. Secure output current of 300 mA or more.
    Therefore, connect Vin and Vadj and connect Vout and Vf.
    Please tell me 'Output current limitation' under this condition.

    Thanks, Masami M.