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LMZ14203: Need to know the Material type whether it is made of plastic or ceramic

Part Number: LMZ14203

I am in need of finding a material type of this DC-DC converter. When I strived to find a material type, I got confused and decided to ask in this forum. Also, I need to know the IPC standards followed for this DC-DC converter design and operation. My Requirement is this IC should come under the IPC 'Level 1' rating.  Where can I find all these info? Thanks in Advance!