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[FAQ] Why do the rails not start or stop? UCD90xxx

Sam
Expert 4175 points
Other Parts Discussed in Thread: UCD90120A, UCD9090, UCD90160A, UCD90160, UCD90320U, UCD90120, UCD9090A, UCD90124, UCD90124A, UCD90320

First, check if the EN pin output from the UCD90xxx is at the correct state. If not, it means the On/Off Config or dependency conditions are not met for the rail to start or stop. If the state is correct but the rail does not start or stop, check the POL controller.

For more FAQ please check the following document.

UCD90xxx Family Frequently Asked Questions and Answers 

UCD9090 UCD9090A UCD90120 UCD90120A UCD90124 UCD90124A UCD90160 UCD90160A UCD90320 UCD90320U