BQ25703A: vs BQ25700A or other options, and datasheet for BQ25703?

user6277674

Part Number: BQ25703A
Other Parts Discussed in Thread: BQ25700A, BQ25703, BQ24179, BQ25708

We are using the BQ25703A in a current design, but stock issues mean we are considering other options.
1 - How likely is the BQ25700A to interoperate on an I2C bus?
2 - I see some distributors advertising a BQ25703RSNR or BQ25703RSNT. Is this a related but obsolete product? If that's the case, we might be able to use that to get through the current part shortage. However, I haven't been able to find a datasheet anywhere. Did this part ever exist? If so, can anyone point me to a datasheet? Or are distributors who claim to be selling it, actually just mislabelling the BQ25703A?
3 - Are there other parts in that family, that are similar enough in performance, that we might consider them as alternatives?

Best regards,
Mylène

over 4 years ago

+1 Pengzhao Zhu over 4 years ago

TI__Genius 11385 points

Hi Mylene,

Thanks for reaching out. Regarding your questions:

1. BQ25700A is a SMBus part. Please use it in a SMBus system instead of an I2C system. The 2 protocols are similar but they are not the same.

2. They both exist. Please see the following.

This information is available in the "Packaging Information" section of the BQ25703A datasheet.

https://www.ti.com/lit/ds/symlink/bq25703a.pdf?ts=1624297457152&ref_url=https%253A%252F%252Fwww.google.com%252F#:~:text=The%20bq25703A%20is%20a%20synchronous,drop%20below%20system%20minimum%20voltage.

3. Yes, you may consider the newer BQ2571x, BQ2572x, or BQ2573x buck-boost parts. Here is a device comparison table for your reference.

Thanks and I hope this helps,

Peng

*If my answer solves your question, please press "This Resolved My Issue" on the thread.

0 user6277674 over 4 years ago in reply to Pengzhao Zhu

Prodigy 10 points

Hello Peng, Thank you for the device comparison table, I'll take a closer look.

Re #2 -- note the lack of the letter "A" in the product number of the original question. I am aware the BQ25703ARSNT and BQ25703ARSNR are different packages sizes of BQ25703A. However, some distributors are advertising BQ25703 -- no letter suffix. Is there such a part? If so, where can I find a datasheet?

Best,

Mylène

0 user6277674 over 4 years ago in reply to user6277674

Prodigy 10 points

As well -- I should have mentioned originally, we are not using the OTG feature set. If there are other, non-OTG-capable parts that we should also consider, I would very much appreciate suggestions!

Mylène

+1 Pengzhao Zhu over 4 years ago in reply to user6277674

TI__Genius 11385 points

Hi Mylene,

No, there is a not device with just BQ25703 and without the "A".

BQ24179 and BQ25708 do not have OTG. However, BQ24179 is an integrated part (lower power) and BQ25708 is SMBus based.

For the other buck-boost parts, you simply need to not enable OTG if you do not need it.

Thanks and I hope this helps,

Peng

*If my answer solves your question, please press "This Resolved My Issue" on the thread.

0 user6277674 over 4 years ago in reply to Pengzhao Zhu

Prodigy 10 points

Thank you -- much appreciated!

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BQ25703A: vs BQ25700A or other options, and datasheet for BQ25703?