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<?xml-stylesheet type="text/xsl" href="https://community.arm.com/utility/feedstylesheets/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/"><channel><title>battery powerd system</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/16008/battery-powerd-system</link><description> Hi, 
I want to project controller board powered by 2 AAA batteries. It should have power down-wake up functionality (for long battery life) and serial communication. Are there any low power supply versions with 8032 core or better use a high efficiency</description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator><item><title>RE: battery powerd system</title><link>https://community.arm.com/thread/71722?ContentTypeID=1</link><pubDate>Mon, 11 Aug 2003 17:27:39 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:2d1e9f77-80d2-4406-9b3d-eff979d2517d</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;i&gt;&amp;quot;I am sure Maxim or Linear have a simple 2.7V to 5V boost regulator that you could use if you wanted to.&amp;quot;&lt;/i&gt;&lt;br /&gt;
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I&amp;#39;m certain they do.&lt;br /&gt;
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However, if you want to go this route, you&amp;#39;d probably be better to look at one of their converters that runs from a &lt;i&gt;single&lt;/i&gt; cell. This will simplify your mechanical design, and give better overall battery utilisation.&lt;br /&gt;
You could probably use a single AA rather than two AAAs - which gives you a better energy density anyway.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: battery powerd system</title><link>https://community.arm.com/thread/71723?ContentTypeID=1</link><pubDate>Mon, 11 Aug 2003 15:41:07 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:b771a0b0-7621-4742-806e-d05dfb43bbc2</guid><dc:creator>Philip Garman</dc:creator><description>&lt;p&gt;Also check out the MAX3223.  It&amp;#39;s designed for battery power systems and has a self-shutoff and wakeup feature that powers the chip down to around 1uA when not in use.  If your system spends most of the time in idle mode, this is your best bet.&lt;br /&gt;
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If serial activity is pretty much non-stop, the auto power off\on feature isn&amp;#39;t really necessary.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: battery powerd system</title><link>https://community.arm.com/thread/40694?ContentTypeID=1</link><pubDate>Mon, 11 Aug 2003 15:37:46 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:4ac1a811-8bfa-412e-a90e-f016adc72d0d</guid><dc:creator>Philip Garman</dc:creator><description>&lt;p&gt;Take a look at Philips low power chips as well:&lt;br /&gt;
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P89LPC92x&lt;br /&gt;
P89LPC93x&lt;br /&gt;
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Priced right around $1 US in large quantity&lt;br /&gt;
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Phil&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: battery powerd system</title><link>https://community.arm.com/thread/40692?ContentTypeID=1</link><pubDate>Mon, 11 Aug 2003 11:31:34 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:b30b400e-e60a-44a8-8ba1-cf61f52f666d</guid><dc:creator>Manoj Gopalan</dc:creator><description>&lt;p&gt;Try the AT89C1051U. It will work down to 2.7V input. It also has a Idle and Power down mode. Its small (20 pin SOIC) and in Idle mode will pull 1mA and pull 20 uA!! in power down mode.(both at @3V and 12 MHz)&lt;br /&gt;
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For your serial port, try the MAX3229 series. It is a 2RX/2TX topology and it too will work down at 2.5V (and less I think) and has shut down and will pull only 0.3mA in AutoShutdown Mode. If you cannot use the UCSP package, try the MAX3323. It is quite a bit bigger and pulls about a 1mA @3V.&lt;br /&gt;
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In general, I recommend against any power supplies at all. They just burn power that could be used to directly power low voltage devices. I am sure Maxim or Linear have a simple 2.7V to 5V boost regulator that you could use if you wanted to.&lt;br /&gt;
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MG&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>