4A2D LDO Specs

Unless I misunderstand your question I'm not sure you will find anything better than the manufacturers data sheet.

Entering 4A2D into

reveals it to be a Torex XC6204A23ADR regulator. HTH

piglet

And yes, I did misunderstand!

Thanks, that is just what I needed.

Warren

03C8-schematic.pdf R

Using:

If I assume a XC6204A, B Series part and the circuit shown as "Typical Appl ication Circuit", then when no input is provided to VIN and CE is likewise grounded by discharged CIN, then the internals of the LDO are shutdown/disa bled.

However, looking at the block diagram, if someone were to supply +3.3V at t he VOUT end, then some current would flow internally through the voltage di vider from VOUT to VSS, through R2 and R1 (I'm ignoring the zeners and othe r internal leakages).

Is there a way to determine the voltage divider current flow (or R1 + R2) f rom the datasheet?

If I had the separate part, I would simply measure Rtotal from VOUT to VSS on the bench. But even if I had an isolated part, I would have trouble hand ling it, let alone seeing the pins. It would likely skate across the bench and onto the floor for the cats to play with.

The only reason I care about this is for STM32 experiments operating with +

3.3V supplied directly (i.e. not using the regulator) in the lowest current configurations. I want to know how much of a factor the unused regulator w ill be. I suspect that the current will be in the 1 uA range but this reall y depends upon internal Rtotal at VOUT.

The datasheet does list Istby, but this does not take into account V being applied at VOUT.

Warren, ve3wwg

address is compromised?

RL

Might be. It worked the first day that Piglet responded. The next day I went back and it misbehaved. Or perhaps the bills haven't been paid?

Warren

That domain name is for sale.

--
Never piss off an Engineer! 

They don't get mad. 

They don't get even. 

They go for over unity! ;-)