On 9/6/06, Brendan Moran <annirack@shaw.ca> wrote:
> I want to make a multiphase SMPS with a variable output voltage from 2V
> to 10V.  The current through this supply would be 4A-20A. (it's attached
> to a passive load).  The load, however, doesn't like ripple current, so
> I thought that a two-phase SMPS would be a good idea.  Even some of the
> 4-phase SMPSes look nice until I see that they only go up to 3.3V
>

What is the requirement for the ripple current? I think there is no reason
why you can not use a single phase Synchronous Buck converter
for your application. You can always use higher value output capacitors
(more capacitors in parallel, but check if the ESR and stability) and higher
\value to reduce the ripple current if you do not need very fast response
time. What is your load?

Those multi-phase PWM controller are often designed for motherboard
VRM application. In those cases, response time is quite fast.

Regards,
Xiaofan
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