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TPS650250: EN_DCDC1 logic low could not shut down VDCDC1 .

Part Number: TPS650250

Hi Sir

The customer uses VINDCDC1 to input 5V and output 3.3V. When the EN pin is logic lowered, there is still output at 3.3V.May I ask why?

we change another IC in this board ,this phenomenon still excit .

tps650250 Schemetic and test wavefrom.docx