Hello
I am trying to design a 48Vin-30Vout-10Aout current-limited
(programmable from microprocessor) step-down DC-DC converter.
To do this I am looking for a current mode synchronous buck
controller. The only one I found is a Linear LT1339: it can
easily handle voltages up to 60V and directly drive the two
mosfets. Nevertheless it has some drawbacks: mainly it is
not born to be current-programmable, therefore I am not sure
I will be able to set the current limit from the micro; then
it needs 12V to be supplied; and finally it seems to be quite
old and very expensive (about 7$ + vat !!).
Can anyone confirm this is a good choice anyway? ...or maybe
suggest me an effective alternative? Perhaps a lower voltage
IC connected to an high voltage mos-driver (like a IRF2110
from International Rectifier)?

Thanks everybody for supporting.
Davide


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