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Power Tip 41: Powering DDR memory

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satfscale
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re: Power Tip 41: Powering DDR memory
satfscale   11/18/2011 6:01:54 AM
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Good article Robert.

Vsklovsky
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re: Power Tip 41: Powering DDR memory
Vsklovsky   11/17/2011 3:34:07 PM
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Termination with parallel RC circuits eliminate the need of addtional power supply for power saving and could be more efficient. In comparative analysis of linear vs switch supply some assumption were taken w/o specifc considreaations that cause not correct and full results depending on implementation: - use switcher suplly with high switching frequency: loo bandwidth would be significabtluy higher; high frequency transient peak cuurent would be handle by power supply output and bypass capacitors - application data processing by DDR equalizes average current drain during interval times - linear supply has to be used for voltage input comparable with output voltage (few hundreds mV above as LDO) in order to receive efficiency 70-80% but not 50% and low dissipation; if you need 1.5V output use 1.8V input from switch regulator but not 3.0 V directly for 3.0A load!! Generally, Not satisfied with this kind of tips. Vladimir Sklovsky Vlaidmir Sklovsky

tonytone
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re: Power Tip 41: Powering DDR memory
tonytone   11/15/2011 6:16:11 AM
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ENPIRION has switching solutions for Vtt without giving up on footprint. Please contact me if interested. We have 2A, 5A and 8A switching solutions. tchen@enpirion.com

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