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TPS2121EVM-023: About TPS2121 standby current

Part Number: TPS2121EVM-023
Other Parts Discussed in Thread: TPS2115A

Hello Sir,

Our design is INx USB 5V, INy Li-battery 3.8(typ)

May I know how to enter standby to see standby current 25uA ?

Many thanks !

  • Hi Terry, 

    Thanks for reaching out on E2E!

    The standby current is specified as the leakage current that enters the input pin that isn't powering the device. For example, the leakage current entering IN2 when IN1 is powering the output of the device. 

    You can measure this value by connecting a power supply to the secondary rail and measuring the leakage current. If you're looking for a device with a lower leakage current, the TPS2215A could also work for this 5V application.


    Arthur Huang

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    Please click "This resolved my issue" button if this post answers your question.

  • Hello Arthur,

    So this chip normal Iq is 300uA (400uA max),right?

    Do you mean tps2115a ?

    We'll check spec and many tks!

  • Hi Terry, 

    Correct, that is the normal quiescent current of the device. 

    Sorry, I meant the TPs2115A.

    Let me know if you have any questions!



  • Hello Arthur,

    Got it and many thanks your help !