TPS386000: /WDO power up behavior

Kazuki Itoh

Genius 9175 points

Part Number: TPS386000

Hello team,

I have a question about the TPS386000 WDO output behavior at power up.
Does /WDO just follow VCC?

Or, /WDO keep low until the VCC exceeds +0.9V (power-up reset voltage), and then go to high-Z?

Regards,

Itoh

over 3 years ago

0 Ben C over 3 years ago

TI__Mastermind 29575 points

Hi Itoh-san,

/WDO is at a high-impedance state when VCC < 900mV. Since the /WDO in the TPS386000 is an open drain output that can be tied to a resistor to VCC, /WDO will follow VCC. Once VCC > 900mV, the /RESET pin can toggle and the WDI timer begins.

Ben

0 Kazuki Itoh over 3 years ago in reply to Ben C

TI__Genius 9175 points

Hi Ben-san,

Thank you so much!

Regards,

Itoh

0 Ben C over 3 years ago in reply to Kazuki Itoh

TI__Mastermind 29575 points

Hi Itoh-san,

Glad to be of help!

Ben

Power management

Power management forum

TPS386000: /WDO power up behavior