TPS62130A: PG Leakage with Vin powered down

Steve Widener

Part Number: TPS62130A

Is there any significant leakage into the TPS62130A when VIn is powered down (0V) and voltage (say 3.3V) is applied to the PG pin?

over 4 years ago

0 Amod Vaze over 4 years ago

TI__Mastermind 26760 points

Steve,

Are you looking at leakage current into PG pin when VIN=0V? Datasheet lists a 1nA typical and 400nA max leakage current into PG pin with VPG=1.8V.

Thanks,

Amod

0 Steve Widener over 4 years ago in reply to Amod Vaze

TI__Genius 11010 points

Yes, when Vin = 0

The datasheet doesn't call out a current when Vin = 0 that I could find.

0 Amod Vaze over 4 years ago in reply to Steve Widener

TI__Mastermind 26760 points

Steve,

This is probably not characterized as I couldn’t locate it in the internal systems. I can test on an EVM to find out a typical value. I’ll pull up the PG pin separately to a 3.3V external supply for this test to measure the current into PG pin. Is this something you’d be interested in?

Thanks,

Amod

0 Steve Widener over 4 years ago in reply to Amod Vaze

TI__Genius 11010 points

Amod,

Yes - that would be useful data

0 Amod Vaze over 4 years ago in reply to Steve Widener

TI__Mastermind 26760 points

Steve,

I tested this on an EVM and observe around 328nA PG pin current without any VIN applied and pull-up voltage of 3.3V. The current resolution was an issue on the DMM so I measured the RPG resistor and the drop across it to estimate the current. Let me know if you want any more information regarding this.

Thanks,

Amod

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TPS62130A: PG Leakage with Vin powered down