LPC4357 VBAT current consumption

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by michele sponchiado on Thu Jul 16 00:45:48 MST 2015
we're using an LPC4357, and we're checking the current consumption from VBAT with powered off chip.
We measured 70 microAmpères before applying the patch suggested in the LPC435x errata sheet (in the paragraph 4.1).
Then we applied the patch, so that RTC_ALARM and SAMPLE pins are now set to inactive, and we measure now about 8 microAmpères.
This is considerably better, but I was expecting something less, about 4 or 5 microAmpères.
Are there any other tricks to reduce VBAT current consumption or this is the minimum we can attain with powered down chip?