topic Re: LPC54102 power rail leakage? in LPC Microcontrollers

LPC54102 power rail leakage?

StephenYeh — Tue, 09 Aug 2022 13:55:39 GMT

Hi,

Is it possible that power rail design

@ VDDA:3.3V / VDD:1.8V / VREFN: 0V / VREFP:2.5V ?

We got the issue that VDD will leakage to 2.3V.

Re: LPC54102 power rail leakage?

StephenYeh — Wed, 10 Aug 2022 00:56:31 GMT

Hi,

I check the spec.(the leakage will from VIA design(it will refer. VDD) right?

Re: LPC54102 power rail leakage?

ZhangJennie — Mon, 15 Aug 2022 07:19:04 GMT

Hi StephenYeh

This issue is linked with a internal ticket. I will keep you informed if any update.

For now, I suggest you setting VDDA equal to VDD.

Thanks,

Jun Zhang

Re: LPC54102 power rail leakage?

ZhangJennie — Thu, 08 Sep 2022 03:20:25 GMT

Hi @StephenYeh

In the limiting table, the analog input voltage should say VDDA instead of VDD. When the ADC is used, the signal levels signal levels on analog input pins must not be above the level of VDDA at any time.

Hope this helps,

Jun Zhang