Buck Converter IC  o/p 5V - Page 1
Forum section: electronics / projects

author: agganitk
author_rank: Newbie
timestamp: February 26, 2022, 06:51:44 am
content: HelloI am looking for Buck converter IC to drop 60V to 5V for MCU Power. Please suggest IC. I see TI has solutions but none seems to be in stock at mouser.Thanks

author: inse
author_rank: Super Contributor
timestamp: February 26, 2022, 07:28:20 am
content: LM 2575 HVT-5.0 for x00 mA7805 + zener diodes for 10mA and belowYou should have better been asking in the first place.

author: agganitk
author_rank: Newbie
timestamp: February 26, 2022, 08:45:32 am
content: thanksbut its i/p is limited 40 volt.

author: inse
author_rank: Super Contributor
timestamp: February 26, 2022, 09:01:11 am
content: 7805?That's why you should put a 24V or two 12V Zeners in series to drop the voltage.LM2575 HV is rated 60V input.

author: agganitk
author_rank: Newbie
timestamp: February 26, 2022, 09:26:38 am
content: don't want to use zenor due to current consumption.

author: tooki
author_rank: Super Contributor
timestamp: February 26, 2022, 10:34:55 am
content: If you’re going to ask others to do your research for you, at least be kind (and smart) enough to provide the absolute rock-bottom basic information required, like how much output current you need, not just input and output voltages. The more info you provide, like efficiency, output noise/ripple, etc requirements, any added features you might need (like enable input, power good output, etc) the better.

author: inse
author_rank: Super Contributor
timestamp: February 26, 2022, 11:52:47 am
content: Tell us about your concerns concerning current consumption

author: deskpro256
author_rank: Contributor
timestamp: February 28, 2022, 08:31:27 am
content: Hi, you would need to supply more information, because all others can "help" with is guessing what you need.This is the perfect time to use the parametric search and learn how to use it.DigiKey provided me with many chips and there were ones with 10's, 100's and 1000's in stock.This MAX5035 can use voltages from 7.5V to 76V on the input and have 5V ~1A on the output.https://www.digikey.lv/en/products/detail/analog-devices-inc-maxim-integrated/MAX5035DASA/1513266Haven't used it, didn't check past the first page.Do your research and hope you get the project up and running.

author: mariush
author_rank: Super Contributor
timestamp: February 28, 2022, 06:01:32 pm
content: Diodes are cheap, around 1 cent each if you buy a lot of them .... you have 0.8v or more voltage drop per diode, so you could basically put 20-30 of them in series to bring the voltage down to around 40-45v and that would open the door to a much wider range of voltage regulators.Wouldn't take more space than a to-220 regulator.Or use diode packs like BAV99 for example .. 2 diodes in series, each around 0.7v drop, so 1.5v drop per component.

author: SiliconWizard
author_rank: Super Contributor
timestamp: February 28, 2022, 06:16:51 pm
content: Yeah we don't don't much about your requirements.But a quick search (that you could probably have done yourself) got me a few results that are not TI, for instance:* RTQ6360 series (Richtek)* MAX17502Availability? Dunno. Not sure.At this point, one may as well design electronics with rubber bands.