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TPS2662: Questions of TPS2662

Part Number: TPS2662

Dear Team,

Please tell me how the TPS26621 efuse works.

1. When Vin inputs Vout, it will output (when SHDN ON[high])
2. If SHDN is controlled through MCU, when it is initially turned on, each channel will be powered through TPS26621 to DC/DC and output 3.3V to the MCU to start working.
When the MCU is not powered on or during the boot up process, is the control pin of the MCU high impedance? Or will it interfere with the action of the SHDN? The main reason is that the eFuse is turned off due to the SHDN malfunction due to the MCU.

Many Thanks,