How much current on LC and 3.6 for 3V3 ?

[u_cap]

I want to power 1-8 sensors from the Teensy 3V3.

The 3.5 and 3.6 "welcome" cards say 250mA for 3V3 max. I don't have a card for the LC - is it the same?

Is that regardless of how hard the processor is working?

Per spec, each sensor draws a max of 7mA at 3V3. At 8 sensors, this would be less than 60mA, so I should be OK?

 

[Theremingenieur]

On the Teensy LC card, 100mA are indicated for the 3.3V output

 

[GremlinWrangler]

Teensy LC uses an on chip regulator where 3.2/4/5 use a dedicated regulator, this is why the lower available current and also means drawing to much from the LC 3.3V kills the CPU rather quickly (dedicated regulators are a bit more forgiving). 60mA should be fine but keep an eye on things if the project starts to feature creep.

 

[u_cap]

60mA should be fine but keep an eye on things if the project starts to feature creep.

Thanks - I might not even need feature creep, because the LC might be running all out if I actually use the max of 6 sensors (42mA) it can serve. Each sensor needs at least one FlexTimer Module InputCapture, with 10Mhz as max pulse rate over up to 200usec duration for each event, usually all sensors registering at almost the same times. There's an alternative mode where I might try run 3 sensors with 2x FTM each (the sensor has another output providing the envelope), but that will be less load on the LC and half the sensor current, so if I can get 6 sensors to work I'm good.

The full extent of my ambition is to add one of these:
https://www.ebay.com/itm/LSM303C-3-...r-Sensor-Module-for-Arduino-H1Z7/273132674862
https://www.ebay.com/itm/LSM303DLHC...-Axis-Magnetometer-Module-Sensor/173332592741
https://www.ebay.com/itm/GY-511-LSM...r-Accelerometer-Sensor-Module-L8/253049573715
as well as 6 sensors, but that I will just have to try - all I know is that the LSM303 datasheet lists 110uA typical at 2.5V supply, which sounds like I don't have to worry about that being the part that pushes the LC over the edge.