Hi to everyone,
I'm currently writing my Master's dissertation about a magnetometer that uses two LP2981 as linear regulators on it's power source.
It's all working very well, but I do need to include a Temperature Drift Compensation formula for it, as I already do have a formula working to other components on the PCB).
The problem is i've already searched in all the three datasheets i've found:
- LP2981-N Micropower 100-mA Ultralow Dropout Regulator in SOT-23 Package
- LP2981 100-mA Ultra-Low Dropout Regulators With Shutdown
- Micropower 100 mA Ultra Low-Dropout Regulator (old, from National)
And I still can't find this information. Only found a "Output Voltage vs Temperature" graphic. But maybe it doesn't help very much.
The compensation formula is pretended to work in 10°C to 40°C temperature range.
In one of these datasheet, i've found only this info: "This includes a tight initial tolerance (0.75% typical), extremely good line regulation (0.007%/V typical), and a very low output voltage temperature coefficient, making the part an ideal low-power voltage reference". But it doesn't explicity tell me how much is the temperature coefficient
Any ideas ? I do need, too, to write these information along other in my dissertation...
