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LM5145: Switching frequency becomes very high when No.2 pin and No.3 pin are shorted.

Part Number: LM5145

 Hello guy,

 One of my customers is evaluating their own power supply which uses LM5145 for their new products.

 They did adjacent pin short test as one of their power supply reliablity test.

 They found LM5145 frequency became very high when No.2 pin and No.3 pin of the device are shorted.

  Is this phenomenon reasonable?

 Your reply would be appreciated.

 Best regards,

 Kazuya.