2V Supply Voltage for LPC546xx

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2V Supply Voltage for LPC546xx

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Contributor I

Hi All,

This is the first time I use LPC546xx.

My system uses USB High-Speed then I have to use USB1. I must use 2V for VDD.

The question: Can I use 3.3V for USB1_AVDD3V3, USB1_AVDDTX3V3 and 2V for VDD, VDDA, VBAT, Vrefp?

If yes, is there any note that I must consider?

Thanks in advance!

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NXP Employee
NXP Employee

Hi, 

For USB full-speed it is necessary VDD=3v min for operation while USB1_AVDD3V3 and USB1_AVDDTX3V3 are at 3.3V, for USB high-speed it is necessary VDD=1.71v min while USB1_AVDD3V3 and USB1_AVDDTX3V3 are at 3.3V.

Have a nice day!

Regards 

Soledad

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NXP Employee
NXP Employee

Hi, 

For USB full-speed it is necessary VDD=3v min for operation while USB1_AVDD3V3 and USB1_AVDDTX3V3 are at 3.3V, for USB high-speed it is necessary VDD=1.71v min while USB1_AVDD3V3 and USB1_AVDDTX3V3 are at 3.3V.

Have a nice day!

Regards 

Soledad

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Contributor I

Hi Soledad,

Thanks for your confirmation.

Best Regards,

--

TN

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