TPS51206: 3.3V operation - What is the enable threshold for S3 and S5 pins?

Ray Uhen

Part Number: TPS51206

I am using this part with a VDD = 3.3V supply rail. The datasheet only lists characteristics for a VDD = 5V supply rail.

It lists VLH - S3 and S5 High-level voltage minimum at 1.8V. Is this value lower when operating on a 3.3V rail?

I have a 1.8V logic level signal I am hoping to use to enable the part, but cannot guarantee it will be exactly 1.8V or higher.

over 8 years ago

0 Ray Uhen over 8 years ago

Prodigy 30 points

I still am looking into this but have not found an answer and can't simulate this part on WEBENCH to find the answer either. Speaking with the TI online chat, they suggested to ask for an update on this?

Thank you.

0 Qian Chen over 8 years ago in reply to Ray Uhen

TI__Mastermind 24075 points

Hi Ray,

The actual high-level threshold of S3 and S5 is around 1.3V.
The 1.8V logic level should be fine.

Thanks
Qian

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TPS51206: 3.3V operation - What is the enable threshold for S3 and S5 pins?