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UCD90160A: 12V cannot be shut down

Part Number: UCD90160A

Hi all,

In the design, customer set SHUT_12V_B to 12V output high enable and controls DC-DC power-on. SOCPL_SHUT_12V_REQ_3V3 is 12V power-on trigger signal, "high" is enable.

When verifying on the Demo board, when SOCPL_SHUT_12V_REQ_3V3 is high. After 12V enable is turned on, if SOCPL_SHUT_12V_REQ_3V3 is set low again, it is found that the 12V enable signal is always on and cannot be turned off to power off 12V.