Probably easier to ask the guy who designed it, but first guess? The one is far more efficient at low current draw.
Mark > On Mar 22, 2016, at 11:29 PM, Rory Conaway <[email protected]> wrote: > > I got this from a buddy of mine who is working on a circuit. His basic > question is why two different regulators. If anyone can enlighten him, and > me, I’d appreciate it. > > > I'm using an existing circuit to create a custom PCB. The board I am using > as an example has a 5v and a 12v regulator, both capable of 3A to be used for > video transmitters. They both use 100uH inductors as filters which is far > larger than the specified ones for the regulators. They selected an MPS > MP1584EN for the 12V regulator and an MPS MP2303ADN for the 5V regulator. > > From looking at the specs, they are very similar in functionality. I'm > wondering why they selected 2 different regulators instead of the same one > for both sides. This is for a drone and the power source is a 4-6S LiPO > running between 13.5- 25.2V. Can you shed some light as to why they picked > different regulators for these? > > I have attached the DataSheets for both of those regulators. > > Thanx. > > - Robert Beaubien > - Sr. Software Architect > - Kool Software LLC > > “Dear Algebra, Please stop asking us to find your X. She's never coming back > and don't ask Y.” > > <MP2303ADN Datasheet.pdf><MP1584EN Datasheet.pdf>
