Looking for a LT1765 pin-compatible buck regulator with Iout>=3.5A
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Posted by MM on November 5, 2008, 10:45 pm
Please log in for more thread options Any hints will be highly appreciated. I found a few parts in SO-8 satisfying all of the electrical requirements, but none of them is even close to be pin-compatible... Thanks, /MM | |||||||||||||
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Posted by JosephKK on November 12, 2008, 10:11 pm
Please log in for more thread options Sounds like time for an adapter board with heat dissipation arrangements. | |||||||||||||
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Posted by MooseFET on November 13, 2008, 10:00 am
Please log in for more thread options > Vin=3D5V, Vout=3D1.2V, SO-8 package
ing
> > Any hints will be highly appreciated. I found a few parts in SO-8 satisfy= > all of the electrical requirements, but none of them is even close to be
> pin-compatible... Is your actual load 3.5A or is that your calculated worst case peak current? If it is the average, you are in big trouble. If it is the peak, there may be ideas to get the number below that value. without making big changes to the PCB. What sort of inductor are you using? | |||||||||||||
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Posted by MM on November 13, 2008, 6:40 pm
Please log in for more thread options Well, the regulator is supplying core voltage for an FPGA. Since I'd posted
the question I managed to drop the current to about 2.4A by changing the FPGA design . The heat problem still remains, but a quick experiment with adding a heatsink showed that this solution will work. /MM Is your actual load 3.5A or is that your calculated worst case peak current? If it is the average, you are in big trouble. If it is the peak, there may be ideas to get the number below that value. without making big changes to the PCB. What sort of inductor are you using? | |||||||||||||
>
>Any hints will be highly appreciated. I found a few parts in SO-8 satisfying
>all of the electrical requirements, but none of them is even close to be
>pin-compatible...
>
>Thanks,
>/MM
>