topic LPC4357 VBAT current consumption in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/LPC4357-VBAT-current-consumption/m-p/578068#M19758 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by michele sponchiado on Thu Jul 16 00:45:48 MST 2015</STRONG><BR /><SPAN>Hi,</SPAN><BR /><SPAN>we're using an LPC4357, and we're checking the current consumption from VBAT with powered off chip.</SPAN><BR /><SPAN>We measured 70 microAmpères before applying the patch suggested in the LPC435x errata sheet (in the paragraph 4.1).</SPAN><BR /><SPAN>Then we applied the patch, so that RTC_ALARM and SAMPLE pins are now set to inactive, and we measure now about 8 microAmpères.</SPAN><BR /><SPAN>This is considerably better, but I was expecting something less, about 4 or 5 microAmpères.</SPAN><BR /><SPAN>Are there any other tricks to reduce VBAT current consumption or this is the minimum we can attain with powered down chip?</SPAN><BR /><SPAN>Thanks!</SPAN></BODY></HTML> Wed, 15 Jun 2016 19:03:55 GMT lpcware 2016-06-15T19:03:55Z LPC4357 VBAT current consumption https://community.nxp.com/t5/LPC-Microcontrollers/LPC4357-VBAT-current-consumption/m-p/578068#M19758 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by michele sponchiado on Thu Jul 16 00:45:48 MST 2015</STRONG><BR /><SPAN>Hi,</SPAN><BR /><SPAN>we're using an LPC4357, and we're checking the current consumption from VBAT with powered off chip.</SPAN><BR /><SPAN>We measured 70 microAmpères before applying the patch suggested in the LPC435x errata sheet (in the paragraph 4.1).</SPAN><BR /><SPAN>Then we applied the patch, so that RTC_ALARM and SAMPLE pins are now set to inactive, and we measure now about 8 microAmpères.</SPAN><BR /><SPAN>This is considerably better, but I was expecting something less, about 4 or 5 microAmpères.</SPAN><BR /><SPAN>Are there any other tricks to reduce VBAT current consumption or this is the minimum we can attain with powered down chip?</SPAN><BR /><SPAN>Thanks!</SPAN></BODY></HTML> Wed, 15 Jun 2016 19:03:55 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC4357-VBAT-current-consumption/m-p/578068#M19758 lpcware 2016-06-15T19:03:55Z Re: LPC4357 VBAT current consumption https://community.nxp.com/t5/LPC-Microcontrollers/LPC4357-VBAT-current-consumption/m-p/578069#M19759 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by embd02161991 on Thu Jul 16 22:32:31 MST 2015</STRONG><BR /><SPAN>Hi Michele,</SPAN><BR /><BR /><SPAN>On the LPC43xx Rev'-' version , this is expected. On the Rev 'A' devices this errata has been fixed. </SPAN><BR /><BR /><SPAN>Thanks</SPAN><BR /><SPAN>NXP Technical Support </SPAN></BODY></HTML> Wed, 15 Jun 2016 19:03:57 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC4357-VBAT-current-consumption/m-p/578069#M19759 lpcware 2016-06-15T19:03:57Z