TS5A3359: TS5A3359 INO(pwroff) and INO(off) leakage current

Kevin Zeng

Intellectual 1520 points

Part Number: TS5A3359
Other Parts Discussed in Thread: TS5A3159,

Hi team,

I noticed that INO(pwroff) leakage current is much larger than INO(off) leakage current, why is that?

INO(off) means NO and COM is off, and the INO(pwroff) means ts3a3359 not power supply, right?

Another question，

Why is the maximum leakage current written in the 5V measurement parameters in the TS5A3159 specification, but not in the 3V3 measurement parameters?

5V power supply parameter

3V3 power supply parameter

over 3 years ago

+1 Tyler McGuire over 3 years ago

TI__Expert 3515 points

Hi Kevin,

For the first question (TS5A3359), you are correct. INO(off) is when the switch is off and the INO(pwroff) is when the device is powered off. The increased leakage is from the powered off protection feature's architecture.

For the second question (TS5A3159), this is an older device and the engineers at the time may have been limited by measurement capability at the production site. We would expect that the leakage at 3.3V is lower than 5V so this could be why only a typical is listed.

Thanks,
Tyler

0 Kevin Zeng over 3 years ago in reply to Tyler McGuire

TI__Intellectual 1520 points

Hi Tyler,

Thanks for answer.

Could you explain how this principles or how it works?

The increased leakage is from the powered off protection feature's architecture.

+1 Tyler McGuire over 3 years ago in reply to Kevin Zeng

TI__Expert 3515 points

Hi Kevin,

We have more information on the feature in this app note:Eliminate power sequencing with powered-off protection signal switches and this TI Precision Labs video: Simplify power sequencing with powered-off protection

Thanks,
Tyler

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TS5A3359: TS5A3359 INO(pwroff) and INO(off) leakage current