For $8.05 in 1's in stock at Digikey you can get the 50A  IR3551

Vin <=3D 15V
0V25 <=3D Vout < 3V3

PQFN 28 package.
09.5 mm / 0.020" between pin centres.
5mm x 6mm pkg.

Synchronous output switch + *internal* Schottky. (Having it internal is a
nice touch - adding a Schottky cross a synchronous output switch relieves
timing constraints and allows you to catch the transient edges which are
'impossible' to handle perfectly with a switched rectifier.)


Datasheet

         http://www.irf.com/product-info/datasheets/data/ir3551.pdf

Pricing


http://www.digikey.com/product-detail/en/IR3551MTRPBF/IR3551MTRPBFCT-ND/433=
3402

_________________

For $7.xx /1  the 25A PQFN IR3847.

http://www.irf.com/product-info/datasheets/data/ir3847m.pdf

R
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