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RT1052 DCDC_OUT voltage abnormal

Question asked by Li Ping on Apr 22, 2020
Latest reply on Apr 28, 2020 by Kerry Zhou

RT1052 will not output DCDC_OUT voltage normally , DCDC_3V3 voltage is stable 2ms then output DCDC_OUT voltage but it wll  drop to zero quickly, however the normal IC will output DCDC_OUT voltage after DCDC_3V3 voltage 3ms and keep 1.1V. For failed board, it always happen issue at the first power on. What may cause the problem?