The idea to put this small module together only came after the completion of a much more comprehensive project.
During the initial POC phase of the project, I got so frustrated with inadequate Voltage regulator modules, that I decided to make this section of the design open source to anyone that might need it.
Some specifications:
- Max Input voltage: 6.5V
- Max Continuous Current: 2A
- Output Voltage: ADJUSTABLE via R1 and R2 resistors
**Attached is also the ISL91107 datasheet for full Electrical Specifications
To calculate the resistor values for the output voltage, use the following formula:
V-OUT = 0.8 * (1 + R1/R2)
i.e: If you would like to have an output voltage of 5V, you would need the following:
V-OUT = 0.8 * (1 + 120k/23k) : (V-OUT will be ±4.97V)
You can adjust the values of R1 and R2 to meet your requirement. I found it helpful to use more resistors with lower tolerances (i.e 1% or 0.1%).
A take-away for me here was the quality of the capacitors. Even though the 1210 capacitors are more costly, their performance is unrivalled and I would urge you to invest them. In our case, this was the key to being able to power a Cellular µC of a Li-SOCl₂ battery.
Included in this post is the full Altium Project file. I hope you can find it helpful :)
~ Friedl.
ps: This was my first project in Altium designer, please feel free to let me know of there are any problems.
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