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electronrancher
Joined: 24 Mar 2002
Posts: 479
Helped: 34
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 18 Jul 2006 21:14 New Openschemes Project - Low current LDO |
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Hi all,
The class-AB op-amps are done, I'm running corner sims and toying around with transferring them between processes. The final schematics will probably be up on openschemes in a few days so I'm moving on to the next project - an on-chip LDO!
I'm wondering if anyone has a favorite LDO paper I should use as a starting point - I know there are tons of them out there, but it's been a while since I looked at any of them so I don't know what new features are being added.
Everyone needs an LDO or two at some time, so it's a natural choice for another free chunk of IP!
http://forum.openschemes.com/viewtopic.php?t=11
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jutek
Joined: 21 Oct 2005
Posts: 271
Helped: 5
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| 19 Jul 2006 9:33 Re: New Openschemes Project - Low current LDO |
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| electronrancher wrote: |
Hi all,
I'm wondering if anyone has a favorite LDO paper I should use as a starting point - I know there are tons of them out there, but it's been a while since I looked at any of them so I don't know what new features are being added.
Everyone needs an LDO or two at some time, so it's a natural choice for another free chunk of IP!
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hi
architecture of LDO depends on specification so write something about it.
regards
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electronrancher
Joined: 24 Mar 2002
Posts: 479
Helped: 34
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| 20 Jul 2006 6:07 New Openschemes Project - Low current LDO |
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| the spec? it's on openschemes. this project is for a low power ldo for 3.3v or lithium ion systems. you can look up any datasheet for these kinds of LDO's and find they are all very similar. try looking for LDO's for digital still cameras - these use about 5 LDO's per device, all a generic 100mA PMOS LDO.
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openschemes
Joined: 24 Jun 2006
Posts: 5
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| 25 Jul 2006 19:10 New Openschemes Project - Low current LDO |
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the articles are now posted on openschemes, thanks to jutek! the topology will be the same small (100mA-200mA) internal LDO, but it will have internal zero compensation in order to be stable with surface-mount ceramic caps.
http://www.openschemes.com/forum/viewtopic.php?t=11
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fmgay
Joined: 19 Jun 2008
Posts: 7
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| 19 Jun 2008 9:08 New Openschemes Project - Low current LDO |
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| Cann't open the webpage.
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xuedashun
Joined: 30 Aug 2005
Posts: 46
Helped: 1
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| 14 Nov 2008 6:53 New Openschemes Project - Low current LDO |
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can not open this website
phpBB : Critical Error
Could not connect to the database
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fixrouter4400
Joined: 06 Feb 2007
Posts: 179
Helped: 15
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| 14 Nov 2008 15:59 New Openschemes Project - Low current LDO |
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please re-post the right link so that we can see it or do we need to sign-up???
thanks
just went to the openschemes website and this is why we're having difficulty..
"You are now registered. However, we were unable to send the activation mail to your email account due to an internal error that had occurred on our server. We are sorry for the inconvenience, please send the webmaster an email notifying him/her of the situation."
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arghpok
Joined: 13 Feb 2007
Posts: 37
Helped: 1
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| 09 Dec 2008 16:12 Re: New Openschemes Project - Low current LDO |
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| when you say low power, how many quiescent current are you willing yo allow ? which is your max output compensation capacitor ?
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