TPS386000: In case of VDD=UVLO

Hirotaka Matsumoto

Part Number: TPS386000

Hi all

Would you mind if we ask TPS386000?

Just in case, we would like to confirm the opereation at VDD=UVLO.
In case of VDD=UVLO, in spite of SENSE conditon, Reset pin is low, right?
If our recognition is not correct, could you let us know?

Kind regards,

Hirotaka Matsumoto

over 6 years ago

0 Michael_DeSando over 6 years ago

TI__Genius 12630 points

Hirotaka,

You are correct. If VDD = or < UVLO, RESET will be low regardless of sense.

If VDD < Vpor (0.9V for this device) then RESET is undefined.

-Michael

0 Hirotaka Matsumoto over 6 years ago in reply to Michael_DeSando

Guru 27525 points

Michael san

Thank you for your reply!
Just in case, we would like to confirm one point.

If VDD < Vpor (0.9V for this device) then RESET is undefined.
->If VDD is less than Power-up reset voltage(0.9V), is RESET unstable output high or low(undefined), right?

Kind regards,

Hirotaka Matsumoto

0 Michael_DeSando over 6 years ago in reply to Hirotaka Matsumoto

TI__Genius 12630 points

Hirotaka san,

You are correct. If VDD is less than 0.9V, RESET is undefined and RESET will be low and will ramp up with VDD until the internal circuitry pulls RESET low and defines the first state when VDD = 0.9 which is RESET = low. The maximum voltage that RESET can ramp to when VDD is less than 0.9V is 0.2V as mentioned in Table 6.5 for Power-up reset voltage spec.

-Michael

Power management

Power management forum

TPS386000: In case of VDD=UVLO