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In our application,under Power OFF Condition,we will be using static situation of RAM supply of some 20 bytes(LSE is not running at all and no RTC crystal is used)and all other Peripherals will be in the OFF Condition.For this condition we need IDD_VBAT.

NRAVI.11
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‎2021-10-21 06:37 AM

Part Number: STM32F091VB

Part Family: STM32F091xx

Query Description:

From the datasheet of STM32F091VB, the current IDD_VBAT through the VBAT Pin is noted as below

0693W00000FDJStQAP.pngThe data in the above table is given in the condition where LSE and RTC in ON.

In our application, under Power OFF Condition, we will be using static situation of RAM supply of some 20 bytes (LSE is not running at all and no RTC crystal is used) and all other Peripherals will also be in the OFF Condition. For the above mentioned Condition, we need the IDD_VBAT data corresponds to Vbat of 2.8V at 25deg Cel and 85deg Cel for our Power Hold Up time calculation.

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