TPS55287: Please review the schematics.

Hi Kakimoto-san,

Thank you for reaching out. May I know what is the application here?

About the schematic, below is my feedback:

1.What is part number of C4001, C4019, C4020, C4021?

2.Recommend to change C4004, C4005, C4014, C4017 to 0402 package and put them close to IC,

3.Add a pull-down resistor in EN pin.

4. Make sure SCL and SDA are pulled up.

5.Changg R40000 to 0ohm.

6.Recommend to change R4009 and R4008 to 1206/0805 package for thermal disspation.

7. With output cap PN, I will help evaluate compensation parameters.

8.Follow layout guideline.5710.TPS55289 Layout Guideline.pdf

Regards,

Mulin

Dear Mulin

Thank you for your response.
The intended use of this circuit is to adjust the temperature of a heater connected to the rear stage.
Therefore, the ripple voltage is not that important.
However, this board should be as small as possible.

1. The second page of the first attached TPS55287_E2E.pdf contains the BOM list. It is described again below.
  C4001 : GRM21BR61A476ME15L
  C4019 : GRM188R61E106MA73D
  C4020 : GRM188R61E106MA73D
  C4021 : 16TQC33MYFB

2. Sorry I forgot to tell you. The chip size was stated in mm. (0603 mm = 0201 inch)
     I place it in the immediate vicinity of the package.

3-5. Understood.

6. Understood. We will accommodate as much as possible due to the need for miniaturization.

7-8. Understood.

Regards

Hi Kakimoto,

I will reply to you later today.

Hi Kakimoto,

Since there is size requirement, we have a new product TPS55285: https://www.ti.com/product/TPS55285 It is already APLed and will RTM in October. It is 2.3*3.5 package size and has less external component. Do you have interest in it?

Loop parameters looks ok to me.

Regards,

Mulin

Dear mulin

Thank you for checking my schematic.

I am interested about TPS55285.
Thank you for your suggestion.

However, for this circuit, I would like to proceed with TPS55287.
This is because the design time is short and we have already proceeded to arrange the components.

Regards,