TPS1H000-Q1: R(ser) for 3.3V MCU

Hazel Sun

Expert 6535 points

Part Number: TPS1H000-Q1

Hi team,

as DS said, Rser=10K for 5V MCU, how about 3.3 MCU? what value do you recommend? thanks

over 2 years ago

0 Elizabeth Higgins over 2 years ago

TI__Genius 16035 points

Hi Hazel,

If the MCU is 3.3V based, we recommend a 4.7-kOhm resistor.

Best Regards,

Elizabeth

0 user6283026 over 2 years ago in reply to Elizabeth Higgins

Prodigy 50 points

Hi Elizabeth

Now the MCU is 3.3V, but I use 10K and do not change 4.7K, will there be any problems or risks?

thanks!

Qingzhi Li

0 Elizabeth Higgins over 2 years ago in reply to user6283026

TI__Genius 16035 points

Hi Qingzhi,

Our recommendation for a 3.3V MCU is at least 4.7kohms,

If the TPS1H000 control pins see voltages greater than VIH and lower than VIL, the device will act as expected. Therefore, the protection resistors are meant to reduce current into the GPIO pins during a reverse current event.

Best Regards,

Elizabeth

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TPS1H000-Q1: R(ser) for 3.3V MCU