LM25119: EN2 PIN

Joshua Li

Part Number: LM25119

Tool/software:

Hi TI ,

I would like to Know about LM25119 EN2 PIN,

According to SPEC ,

It Seems to pull up 50k ohm Internally ,

When I used an oscilloscope to measure, I obtained 4.5V.

May I know more information about how 4.5V comes from?

Best Regards,

Joshua.Li

0 Mahmoud Harmouch 15 days ago

Hello,

it is from the internal regulated voltage that supplies the internal circuitry.

Regards

0 Joshua Li 15 days ago in reply to Mahmoud Harmouch

Hi Sir ,

Thanks for your reply.

To synchronize the voltage rising time for the dual channel, I added 0.1uF on EN2 to delay 5ms.

After the first power on, I discovered that the RC DEALY was invalid.

So I added 200k ohm to help with discharge.

Can you help us check if there are any risks associated with adding 200kOhm to GND?

Best Regards,

Joshua.Li

0 Mahmoud Harmouch 14 days ago in reply to Joshua Li

Hello,

there is no issue adding 200K pull down.

Regards

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