Thanks guys. I appreciate it. Rory
From: Af [mailto:[email protected]] On Behalf Of Chris Fabien Sent: Wednesday, March 23, 2016 6:17 AM To: [email protected] Subject: Re: [AFMUG] Circuit design The one has a much higher switching frequency which means it can possibly provide "cleaner" power when used with appropriate filtering. On Wed, Mar 23, 2016 at 7:06 AM, Mark Radabaugh <[email protected]<mailto:[email protected]>> wrote: 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]<mailto:[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>
