LT3094
Recommended for New Designs
The LT3094 is a high performance low dropout negative linear regulator featuring ADI’s ultralow noise and ultrahigh PSRR architecture for powering noise...
Datasheet
LT3094 on Analog.com
LT3042
Recommended for New Designs
The LT3042 is a high performance low dropout linear regulator featuring LTC’s ultralow noise and ultrahigh PSRR architecture for powering noise sensitive...
Datasheet
LT3042 on Analog.com
LT3045
Recommended for New Designs
The LT3045 is a high performance low dropout linear regulator featuring LTC’s ultralow noise and ultrahigh PSRR architecture for powering noise sensitive...
Datasheet
LT3045 on Analog.com
The LT3042, LT3045... (all positive LDOs of that family) note that some fraction (1:400 or 1:500, depending on max current) of the output current is sourced from the ILIM pin.
Given that the LT3094 is from the same family and the block diagram looks similar e.g. to the LT3042 block diagram, I'd expect it to sink a fraction of the output current (probably 1:500) at its ILIM pin.
Is there any indication the the LT3094's ILIM pin can not be used as a current monitor?
Also, do I understand it correctly that exceeding the output current limit will result in a decreased output voltage for resistive loads (so that the current limit is met) and not in a shutdown and restart after some delay? Although it seems like this is true from the block diagram, there is no written documentation about that behaviour which I can find.
Thanks!
You're correct. When the part hits the current limit, the output voltage will drop for resistive loads.
ILIM cannot be used to as a current monitor. The internal circuitry is different from LT3042.
The above answer conflicts with other LT3094 sources from Analog.
This article mentions "In other cases, such as the LT3094 and LT3045, there is an ILIM pin that functions as a current limit and may be used as an output current monitor."
The DC2624A board is an example implementation of LT3094 and it also says "Current monitoring is also achieved by sensing the ILIM pin voltage."
Using LTSpice, I cannot get this to work. If the LT3094 does not support current monitoring through the ILIM pin, then all of the Analog datasheets and dev boards for this part need to be corrected.
The above answer conflicts with other LT3094 sources from Analog.
This article mentions "In other cases, such as the LT3094 and LT3045, there is an ILIM pin that functions as a current limit and may be used as an output current monitor."
The DC2624A board is an example implementation of LT3094 and it also says "Current monitoring is also achieved by sensing the ILIM pin voltage."
Using LTSpice, I cannot get this to work. If the LT3094 does not support current monitoring through the ILIM pin, then all of the Analog datasheets and dev boards for this part need to be corrected.