TPS566231: EN pin pull down resistor

Shoo Saga

Part Number: TPS566231

Hi team,

The EN pin is connected to weak pull up resistor.

What value pull down resistor is recommended to connect to make sure disable the device?

Regards,

Shoo

0 Calan Elaya 6 months ago

Hi Shoo,

You can follow the User Guide Schematic and have a 20kOhm pull down resistor.

Users Guide Page 12

If this answers your question please click "This resolved my issue" button.

Thank you,

Calan

0 Shoo Saga 6 months ago in reply to Calan Elaya

Hi Calan,

It seems that this 20kohm resistor is for voltage devider of Vin.

but below 20kohm is recommended value?

My customer want to make sure EN line is low after MCU get EN low.

Regards,

Shoo

+1 Calan Elaya 6 months ago in reply to Shoo Saga

Hi Shoo,

The 20kOhm resistor will act as a pull down resistor.

Main thing is make sure the voltage is below the V_EN threshold when EN is pulled low. This will ensure EN is low.

If this helps solve your question, please click "This resolved my issue"

Thank you,

Calan

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