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TMDSEVM572X: Clamping circuits

Part Number: TMDSEVM572X
Other Parts Discussed in Thread: TPS659037,

Hi,

It may be a question for PMIC (TPS659037).

I am looking at the TMDSEVM572X schematic diagram (tidria3c \ CM_A1 LM_A2a PM_A3a \ AM572xEVM_PM \ TI_AM572XEVM_REV_A3a.pdf).
What is the function of the circuit on the lower right of page 4?

Our customers seem to think that this circuit can be omitted.

Best Regards,

Kouji Nishigata