Recommendations for small boost PSU - 9V to 33V @ 40mA - Page 1
Forum section: electronics / projects

author: Psi
author_rank: Super Contributor
timestamp: May 27, 2019, 01:12:47 am
content: Can anyone recommendation me a popular jellybean boost regulator IC for the following?The specs will be.- Boost converter- Input 8V-12V DC- Output 33V @ 40mA max- Smallish total footprint 20x20mm, all SMT parts. Needs high switching freq so smaller SMT inductors can be used.- Reduced part count preferred. Built-in switching transistor and maybe diode inside the IC. I don't mind paying a bit extra for this.- Price isn't super critical. Lets say under $4 each for the IC and it's required external parts at a build qty of 50.Ideas / IC Recommendations anyone ?Thanks a lot

author: sab
author_rank: Contributor
timestamp: June 14, 2019, 09:06:58 pm
content: I bought XL6009 based modules from Amazon. They go up to 35v and run at 400Khz. They may do what you need but are a little bigger than 2cm x 2cm.Sanjay

author: ThomasDK
author_rank: Regular Contributor
timestamp: June 14, 2019, 09:44:48 pm
content: AP3015

author: uer166
author_rank: Super Contributor
timestamp: June 14, 2019, 11:05:50 pm
content: LMR64010X:BOM of 9 parts, cost of everything <$2. Definitely fits in footprint, the TI online tool reports 50mm^2 total area.

author: D Straney
author_rank: Frequent Contributor
timestamp: June 14, 2019, 11:19:15 pm
content: I don't know a specific part off the top of my head, but luckily TI makes a wide variety of good (and cheap) regulators...Linear/Analog Devices makes good (but expensive, from what I remember!) parts.TI's got a nice parametric search on their website, if you go to "Products", "Power Management", then pick "Boost converters (integrated switch)" from the left-hand list. You can then put in your Vin range, Vout, and Iout, and it shows you 17 options:http://www.ti.com/power-management/non-isolated-dc-dc-switching-regulators/step-up-boost/boost-converters-integrated-switch/products.html#p238min=0.3;8&p238max=12;75&p634min=1.23;33&p634max=33;84&p834typ=0.18975;11.9&p212max=75.75757575757575;100Then if you wanted to you could narrow down by max. frequency, maybe synchronous boost (if you really didn't want an external diode - I don't know of any that put a Schottky on-chip), etc.The LMR64010 does turn up on this list and seems like a good option, but still a worthwhile exercise just so you have an easier time picking a part in the future!

author: mariush
author_rank: Super Contributor
timestamp: June 14, 2019, 11:40:21 pm
content: If you can guarantee input voltage below 10v, you have MIC2299 or MIC2290MIC2601orMIC2605will do up to 20v input, up to 40v output , 1.2 Mhz switching frequency ... MIC2606 if you feel you need 2 Mhz sw. freq.

author: Psi
author_rank: Super Contributor
timestamp: June 15, 2019, 04:05:39 am
content: Thanks guys!

author: soldar
author_rank: Super Contributor
timestamp: June 15, 2019, 07:35:17 am
content: Maybe you can use something commercially madehttps://www.ebay.com/itm/302508247809

author: thinkfat
author_rank: Unknown
timestamp: June 16, 2019, 09:23:08 am
content: Quote from: soldar on June 15, 2019, 07:35:17 amBut not those. Mostly because you cannot be sure if they actually meet the claimed spec, or if they are made of genuine parts. Also, waaay too big. Switching frequency likely 200khz to 400khz only.Gesendet von meinem Nokia 6.1 mit Tapatalk

author: ocset
author_rank: Super Contributor
timestamp: June 16, 2019, 03:56:49 pm
content: try linear.com or monolithic power systems