Replacement part for IC4 #fst3253

Wes AE6ZM
 

Has anyone found a source for the SOIC footprint version of IC4, the FST3253? I have a unit on the bench with overheating of the 5v regulator, and it appears that IC4 is drawing excess current. Static measurement shows ~140 ohms VCC to ground. Everything else checks OK on the 5V bus. 
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> I finally got it all together...now I can't remember where I put it<

VY 73,
Wes

AE6ZM

Sierra Vista, AZ

 

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