TPS40322: EN control of TPS40322

Shenhua Zhang

Part Number: TPS40322

Customer wants to control sequence through EN pin.

For TPS40322, we can pull EN to GND to disable IC, and float to enable, but we cannot pull EN to 3.3V to enable IC, right?

over 4 years ago

0 Qian Chen over 4 years ago

TI__Mastermind 24075 points

Hi Shenhua,

That's right. We can not pull EN to 3.3V to enable IC.

Customer can also use UVLO pin to turn on/off the part.

Thanks

Qian

0 user5951090 over 3 years ago in reply to Qian Chen

Prodigy 90 points

Hi Qian,

I want to add pull down resistor at EN pin to ensure the TPS40322 stays disabled, can you suggest resistor value? or any other method to to ensure TPS40322 stays disabled?

0 Qian Chen over 3 years ago in reply to user5951090

TI__Mastermind 24075 points

Hello,

I suggest to use a small FET to pull EN pin low to ensure the part stay disabled.

By releasing EN pin, the rail will start up.

Thanks

Qian

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TPS40322: EN control of TPS40322