TPS650864: PVINx for TPS6508640

na na78

Guru 16770 points

Part Number: TPS650864

I have question for PVINx of TPS6508640.

Typically, PVINx should be connected to V5ANA.

While in TPS6508640 example, PVIN3-5 is supplied from BUCK1 (3.3V).

Regarding to TPS6508640 design, PVIN3, 4, 5 can be supplied from BUCK1?

BestRegards

0 Kevin LaRosa over 5 years ago

As long as V5ANA is supplied from BUCK1.

0 na na78 over 5 years ago in reply to Kevin LaRosa

Guru 16770 points

Hi Kevin

Thank you for your reply.

>As long as V5ANA is supplied from BUCK1.

If V5ANA is supplied from BUCK1, PVIN3-5 can be connected to BUCK1 like Figure 6-3. Is it correct?
(V5ANA = BUCK1 (3.3V) = PVIN3-5 can be allowed?)

In chapter 7.4 Do's and Don'ts, the following is mentioned.

- Do not connect the V5ANA power input to a different source other than PVINx. A mismatch here
causes reference circuits to regulate incorrectly.

Figure 6-3 shows BUCK1 is supplied to the peripherals.
Is it possible to supplying BUCK1 out to V5ANA and PVIN3-5 in the case of Figure 6-3?

BestRegards

0 Kevin LaRosa over 5 years ago in reply to na na78

Yes. Please follow the datasheet.

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