TPS82740B: TPS82740B

Per Trossmark

Part Number: TPS82740B

I Intend to control VSEL3 from a MPU that is powered from TPS82740B. I don't have any pull up. Starting up after a battery change (that will accur every 10year) will put VSEL in a floating condition until the program starts. Is this acceptable. I have VSEL1 and VSEL2 connected to GND. The MPU acceptes voltages from 1.8 to 3V.

over 2 years ago

0 Varun John over 2 years ago

TI__Genius 16390 points

Hi Per,

This may be alright. Since VSEL1 and VSEL2 are grounded, the max output voltage will be 3V, if the device interprets the floating VSEL3 as high.

Best regards,

Varun

0 Per Trossmark over 2 years ago in reply to Varun John

Prodigy 20 points

Why should it interpret it as high

0 Varun John over 2 years ago in reply to Per Trossmark

TI__Genius 16390 points

Hi Per,

The device could interpret the floating VSEL3 as either a high or low. The low will result in a lower output of 2.6V and a high will result in a higher output of 3V.

Best regards,

Varun

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TPS82740B: TPS82740B