Hello All!
I was wondering what would be the most optimum approach to manage multiple outputs in a linear power supply.
For example, I have a single Li-Ion battery, and I need two different output voltages, say 1V8 and 3V3. I opt for a linear power supply to minimise noise in the system. Now, what would be a better approach to this?
1. Should I extract both the voltages directly from the battery?
2. Or should I extract only 3V3 from the battery, and extract 1V8 from the 3V3 output?
3. Or is there any better approach?
The basis of my question is, in a linear power supply, the greater the difference between the input and the output voltages, the more power is dissipated in the regulator/PMIC itself.
To me, both the approaches (1. and 2.) do not hold any significant difference in terms of power savings.
Any suggestions and/or inputs are appreciated.
Thanks in advance,
Abbas.
I was wondering what would be the most optimum approach to manage multiple outputs in a linear power supply.
For example, I have a single Li-Ion battery, and I need two different output voltages, say 1V8 and 3V3. I opt for a linear power supply to minimise noise in the system. Now, what would be a better approach to this?
1. Should I extract both the voltages directly from the battery?
2. Or should I extract only 3V3 from the battery, and extract 1V8 from the 3V3 output?
3. Or is there any better approach?
The basis of my question is, in a linear power supply, the greater the difference between the input and the output voltages, the more power is dissipated in the regulator/PMIC itself.
To me, both the approaches (1. and 2.) do not hold any significant difference in terms of power savings.
Any suggestions and/or inputs are appreciated.
Thanks in advance,
Abbas.