TPS55289: Select the internal LDO or external 5V in operating

Tamio Yokokura

Part Number: TPS55289

Hi, TPS55289 support team

Is it possible freely to switch between Internal LDO and External 5V by controlling the EXTVCC pin while the TPS55289 is running?

Thanks

Tamio

0 Zack Liu over 1 year ago

Hi Tamio,

It's not recommended to switch between internal LDO and external 5V while TPS55289 is running.

The VCC is power supply for the device driver circuit and control logic. A stable VCC is important for this device.

0 Tamio Yokokura over 1 year ago in reply to Zack Liu

Hi, Zack

I informed the rising sequence of VIN, ,VCC and EXTVCC to customer.

> VIN → VCC(5V)→ EN/UVLO

Thanks

Tamio

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