TIDEP-01033 的：The output of the chip TPS6285020MDRLR is only 0.6 volts.

Hi

Can you please repost the query in English?

Thanks

I'm really sorry for posting in Chinese . I'll restate my question in English. I'm attempting to replicate the PCB described in the TIDEP - 01033 technical support document. However, during the debugging process, I found that the output voltage of the chip TPS6285020MDRLR is only 0.6 volts. I'm not sure how to solve this problem.

Hi,

TPS628502MDRLR is a fixed output 1.8V DC regulator. Can you please share the circuit schematic, input and output voltage waveforms? Also, is this behaviour across all boards?

Regards

Ankit

Thank you, I made the PCB according to the circuit diagram in the TIDEP-01033 technical document

Yes, it can also appear on other circuit boards in my batch. Some circuit boards only have TPS628502 circuit without load, and the same applies

Hi,

The schematic looks right. Can you please share the input and output voltage waveforms. I will pass this to PMIC/DC regulator team for better support.

Regards

Ankit

Hi Xiong,

Can you check the reel label for the material you procured to make sure it is the fixed version TPS6285020MDRLR. 

Since you see the output at 0.6V, it looks more like the adjustable TPS628502DRLR.

Best regards,

Varun

Okay, Figure 1 shows the enable pins and Figure 2 shows the output pins. Thank you for your help

Hi Xiong,

The device seems to be regulating at the correct switching frequency to 0.6V. Can you send me a picture of the reel label?

Best regards,

Varun

Sorry, I'm not sure if this is what you're looking for

Thanks. It looks like you have the wrong part number. To get 1.8V, you need to have the TPS6285020MDRLR part number and not the TPS628502DRLR. 

0.6V output is expected with the TPS628502DRLR part you have when VOUT is connected directly to FB.

Can you please order the TPS6285020MDRLR part on TI.com or request your field/sales contact for samples?

Best regards,

Varun

Thank you for your answer. I didn't notice the difference between the two chips, so I have already ordered the signal chip you mentioned