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UC3707: About power sequence

Part Number: UC3707


I am evaluating UC3707 under the following conditions.

   Vc=40V  Vin=Digital input=5V  

  Input frequency =40KHz

Do I have to worry about the Vc and Vin power sequences when turning the IC power on and off?

This is because Vc is on and the IC may have been destroyed when the Vin power was turned on / off.