Hi,
My input is 12VDC and required output is 4.2V. The output is feed via serial resistor in order of 10-15 Ohm.
The output current is dynamic in nature and can vary in between zero to 100mA with slew rates up to 200mA/mSec.
If i use the TPS7B4254-Q1 LDO to feed this output can i use its tracking input to implement "remote sense" functionality?
What i'm trying to achieve is the ability to maintain 4.2V output despite of 10 Ohm resistor and the fact that the load current may vary from zero to 100mA, therefore the output will vary by 1V and should be compensated by razing the LDO output.
The 2 options are:
1. Connect the actual output to FB and let TPS7B4254 control loop to produce this compensation - this is the simplest solution but i'm afraid that this solution will be oscillative... what do you think about it?
2. Second option is to measure the voltage falling n the 10R resistor, add it to the 4.2V reference potential and feed the result to the ADJ input. I'm not sure if this will not become also oscillative... maybe adding delay to the feedback loop will help?
