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LMZ31704 PH pin function

Other Parts Discussed in Thread: LMZ31704


My customer has question about LMZ31704.
Could you tell us about question?

 My customer test performance LMZ31704 in original PCB board. But LMZ31704 can't regulate output voltage.
 Actually my customer mistake all PH pin is open. So my customer connect all PH pin. Output voltage become normal.
 My customer is wondering why does it become normal. We think PH pin is only heat dissipation. Does PH pin have other function?

Best Regards,