TPS25940: Reverse leakage current

vaibhav waman

Part Number: TPS25940

We are using this product to charge supercapacitor, during absence of input voltage to TPS25940 supercapacitor will supply power to RTC chip. So what is the reverse leakage current when output pin has 3 Volt from supercapacitor.As per datasheet there is reverse current at 18V which is in few Micro ampere.

over 6 years ago

0 Rakesh over 6 years ago

TI__Guru** 105531 points

Hi Vaibhav,

Welcome to E2E!
Thanks for reaching out!
we don't have data at 3V but I would expect much lower than at 18V. I can measure for couple of devices and provide typical value if required. Please let me know.

Best Regards,
Rakesh

0 vaibhav waman over 6 years ago in reply to Rakesh

Intellectual 320 points

Hello Rakesh,

Thank you very much.
It would be really great If I get this leakage current data for 3.3v but in absence of input voltage.
In our application we will use this product to charge supercapacitor to avoid diode voltage drop but in off state few nano ampere of lekage current also affect performance of supercapacitor.

0 Rakesh over 6 years ago in reply to vaibhav waman

TI__Guru** 105531 points

Hi Vaibhav,

My bench measurement gave leakage current of 1.2uA at 3.3V (in absence of input voltage). Is this acceptable ?

Best Regards,
Rakesh

0 vaibhav waman over 6 years ago in reply to Rakesh

Intellectual 320 points

Hello Rakesh,

Thank you very much for measurement. but for me this is higher than requirement, I am looking in between 100-300nA reverse leakage current switch.

Best Regards,

Vaibhav Waman

0 Rakesh over 6 years ago in reply to vaibhav waman

TI__Guru** 105531 points

Hi Vaibhav,

Unfortunately, this is where we stand. Please let me know if you have any more questions.

Best Regards,
Rakesh

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TPS25940: Reverse leakage current