LP5036: Are there internal protection diodes around OUTx ?

Russell Wetherley1

Part Number: LP5036

Hello E2E,

As the title suggests, are there protections diodes from the OUTx pins to Vcc? Anything from OUTx to GND? Is there any cause of leakage that we need to be concerned about outside of the spec'd 1uA max from the datasheet?

Regards,

Russell

over 6 years ago

0 Kenneth Du over 6 years ago

TI__Genius 14295 points

Hi, Russell,

Let me take a look at this and reply you on Monday.

Thanks.
Regards,
Kenneth

0 Kenneth Du over 6 years ago in reply to Kenneth Du

TI__Genius 14295 points

Hi, Russell,

There're no diodes from OUTx to Vcc and there're ESD protection diodes for each OUT.

The total leakage for each OUT can be found in 7.5 Electrical Characteristics in datasheet.

When you test the 1uA shutdown supply current, please make sure the Vcc and Vled are seperated and there're no pull up resistors for extra consumption.

Please help to click "Resolve" if the problem is solved.

Thanks.

Regards,

Kenneth

0 Russell Wetherley1 over 6 years ago in reply to Kenneth Du

TI__Expert 4255 points

Kenneth,
Can you clarify that first sentence? "There're no diodes from OUTx to Vcc and there're ESD protection diodes for each OUT." That seems a bit contradictory. Can you perhaps share a quick sketch or block diagram?

Thanks!

Russell

0 Kenneth Du over 6 years ago in reply to Russell Wetherley1

TI__Genius 14295 points

Hi, Russel,

First, there's no connection from OUT to Vcc.

Second, the OUT equivalent schematic is as following:

Please help to click "Resolve" if the problem is solved.

Thanks.

Regards,

Kenneth

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LP5036: Are there internal protection diodes around OUTx ?