LM5176-Q1: Significant leakage on PGOOD

Aiswarya Sasikumar

Part Number: LM5176-Q1
Other Parts Discussed in Thread: LM5176

Tool/software:

The leakage at PGOOD is 0.1mA, which is significant when it's about reducing the standby. Knowing this is a worst case value, please give a supporting graph to estimate the applicable value.

2 months ago

0 Stefan Schauer 2 months ago

TI__Guru 58521 points

Hi Aiswarya,

i will check if we have data for that and come back till end of the week.

Best regards,

Stefan

0 Stefan Schauer 2 months ago in reply to Stefan Schauer

TI__Guru 58521 points

Hi Aiswarya,

I have found some measurement data which show a distribution over temperature.

So typically the current is much lower but has some drift on high temperature.

Best regards,

Stefan

0 Aiswarya Sasikumar 2 months ago in reply to Stefan Schauer

Prodigy 50 points

Hi Stefan, I didn't quite catch what the x-axis data is. I'm looking for the current at 25, and 110 degC, let me know if u have any specific data on this.

0 Stefan Schauer 2 months ago in reply to Aiswarya Sasikumar

TI__Guru 58521 points

Hi Aiswarya,

x Axis is the the measured leakage. y-Axis is the amount of devices where this leakage as been measured.
Colour and pattern marks the Temperature. BIAS was 8.5V.

Best regards,

Stefan

0 Aiswarya Sasikumar 2 months ago in reply to Stefan Schauer

Prodigy 50 points

Bias voltage we r applying even if the IC is not functional? If the regulator is not enabled, wouldn't the bias be much less.

0 Aiswarya Sasikumar 2 months ago in reply to Aiswarya Sasikumar

Prodigy 50 points

And with number of devices, the average is considered?

0 Stefan Schauer 2 months ago in reply to Aiswarya Sasikumar

TI__Guru 58521 points

Hi Aiswarya,

the BIAS voltage in this context is the voltage applied on PGOOD (so the BIAS voltage of that Pin) - not the voltage on the BIAS pin of the LM5176.
Sorry for the confusion.

I do not understand what you would like to ask with that statement: "And with number of devices, the average is considered?"

Can you add more details.

Best regards,

Stefan

+1 Aiswarya Sasikumar 2 months ago in reply to Stefan Schauer

Prodigy 50 points

Stefan, I see I've made a mistake in the conversion, although I don't usually :) The 100nA get converted to 0.1uA not mA as I have incorrectly mentioned at the starting of this chain. Forgive me for taking up ur time, yes,I got to know better about the parameter and that helps. Thank u for assisting.

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LM5176-Q1: Significant leakage on PGOOD