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LM4040-N: Minimum operating current

Guru 19475 points
Part Number: LM4040-N
Other Parts Discussed in Thread: LM4040, LM2903

I think that condition of LM4040 operate(output) is reach 60μA current, but LM4040DIM3-2.5 was not operate even if current flow 174μA by external resister. 

Please let me know about condition of LM4040 operate and correction point of below schematic.

※Pattern 1・・・R119: 20kΩ, R120: 100kΩ ⇒ LM4040 is not output (174μA)

 Pattern 2・・・R119: 10kΩ, R120: 39kΩ ⇒ LM4040 is normal output (427μA) 

By the way, IC101 is LM2903.

Best regards,

Satoshi