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Forum Index : Microcontroller and PC projects : 3.3 volts

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vk4tec

Senior Member

Joined: 24/03/2012
Location: Australia
Posts: 239

Posted: 11:06pm 19 May 2013

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Guys I am using a LM317

To go from 11 volts to 3 volts

Runs hot.

Do they make small switch mode regs ?

One guy suggested mobile phone charger to get from 12 down to 5 then go 3 volts

Andrew

Andrew Rich VK4TEC
www.tech-software.net

kiiid

Guru

Joined: 11/05/2013
Location: United Kingdom
Posts: 671

Posted: 11:38pm 19 May 2013

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Andrew,
You might want to consider some SimpleSwitcher from TI. I have used LM2595 many times and they run very well.

KonEdited by kiiid 2013-05-21

http://rittle.org

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JohnS
Guru

Joined: 18/11/2011
Location: United Kingdom
Posts: 3998

Posted: 02:03am 20 May 2013

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Could be worth a look at the schematics on the Olimex site. They use all manner of chips & voltages. All open hardware.

John

jman

Guru

Joined: 12/06/2011
Location: New Zealand
Posts: 711

Posted: 09:38am 20 May 2013

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Hi
I have used lots of these
DC-DC

Great price

Regards
John

MicroBlocks

Guru

Joined: 12/05/2012
Location: Thailand
Posts: 2209

Posted: 03:22am 22 May 2013

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What about this one:
http://ww1.microchip.com/downloads/en/DeviceDoc/22008E.pdf

They are about 1US$.

Microblocks. Build with logic.

johnbig

Newbie

Joined: 23/06/2011
Location: Australia
Posts: 21

Posted: 08:47pm 22 May 2013

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Hi Andrew. How about the 1.2 to 20 volt switching regulator at 1.5 amps in Silicon Chip Feb 2012 with no heat sink.

John Leate

hakantok
Newbie

Joined: 07/06/2013
Location: Canada
Posts: 1

Posted: 06:56am 10 Jun 2013

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The LM1117-N is a series of low dropout voltage regulators with a dropout of 1.2V at 800mA of load current. The pin-out is similar to industry standard LM317. It is available in five fixed voltages 1.8V, 2.5V, 2.85V, 3.3V, and 5V.

bga assembly Edited by hakantok 2013-06-18

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