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TSU6721YFPR switching off with a power bank

Chris Hamilton
Intellectual 270 points
Other Parts Discussed in Thread: TPS62086, TSU6721

Hi, I have tried several cheap Chinese power banks and they seem to power the TSU6721YFPR just fine.  I have a fancy one however, and after about 30 seconds the power bank powers off.  Is this a negotiation problem or something I did in managing pins?

My blog about the circuit.

In order to utilize the BGA TSU6721 (and it is necessary to utilize the TSU6721 to get OTG + BCD1.2 and have the USB data lines lay out on a single layer), I shorted the MCPC output lines to near by necessary lines.  SCL connects to C3, SDA connects to MIC, S_R, and S_L, IDBP connects to RxD.  OUT actually does drive the a SMPS (TPS62086) producing 3.3V VDD.  Is there any reason the pin shorting could trigger a properly designed power bank to shutdown?  Could the TSU6721 be throwing an error that shutsdown 30s in or negotiate a power down for some reason?

Thanks,
Chris Hamilton