TPS53353: Frequency setting resistor

T Kishi

Part Number: TPS53353

My Customer has question.

The customer will set the frequency to 650kHz.
Therefore, we would like to know the accuracy of the frequency setting resistor.
If possible, I would like to set with the E24 series (820 kΩ).
Please tell me how much error is allowed.

Regard

T Kishi

over 6 years ago

0 JohnTucker over 6 years ago

TI__Guru**** 191445 points

T Kishi,

Let me see if there is tolerance data available. It will be tomorrow before I can answer.

0 JohnTucker over 6 years ago in reply to JohnTucker

TI__Guru**** 191445 points

T Kishi,

TPS53K POL controllers and converters use a DAC (pin strap) to set the switching frequency. For this particular product, I have a calculator that shows me 820k (5% tolerance) will give a reasonable margin to the next threshold and is acceptable in place of the 866k Ohm recommended value.

0 T Kishi over 6 years ago in reply to JohnTucker

Genius 4425 points

Hi John

I understoodd that it is good to use 820 kΩ.
Thank you for confirmation.

Regard
T Kishi

Power management

Power management forum

TPS53353: Frequency setting resistor