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How much current "LCD step-up converter" of STM32L053 consumes?

Question asked by kim.young_gil on Dec 17, 2015
Latest reply on Mar 4, 2016 by kim.young_gil
Hello..

  I have a question that How much current  "LCD step-up converter" of STM32L053 consumes.

  I tested two cases that VLCD power is supplied from internal or external VLCD power.
  In Our H/W board, the internal power source for LCD consumed more 10 uA than the external LCD power source.
  I know that  if VLCD is supplied from internal source,  the internal step-up converter is used.
  And then I wondered that How much current  "LCD step-up converter" of STM32L053 consumes.
  Searching the data sheet, reference manual, googling.... but I have not found it.

Our product have longer sleep time(in STOP mode) than working time,  and during sleep time, our product have to display LCD. 
So, it is important that I can reduce 10 uA in our product.

Could you kelp me know the following
- 10 uA is the current of "LCD step-up converter"?
- The internal power source of LCD uses the current more than the external power source.
- What is the method that I can reduce the current consumption of the internal power source of LCD?

Best Regards 
Young, Kim

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