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Unidentified step-down converter IC

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krykoz

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Hi everyone,
I'm repairing an Advantech' data acquisition module and I found burnt IC which I can't identify. It's step-down converter in SOP-4 package, with three external components: diode, inductor and capacitor in feedback branch. Please find photos attached. Does anybody have an idea what IC is it? Input voltage is probably up to 30 V, output 5 V fixed.
 

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Hi,

It doesn't look like an SMPS IC to me ...
Rather like an optocoupler.

But as with all other "identify this IC" threads: we need more context. Photos of the PCB, so we can see the traces and the electronic parts around.

Klaus
 

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