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TPS63802: Start-up question

Driscoll Tsai
Expert 1590 points
Part Number: TPS63802

Hi Sir,

In DS, the Input Voltage Range: 1.3 V to 5.5 V (>1.8 V for Device Start-up), it seems can't start-up at 1,6V, but want to double confirm.

Could TPS63802 could star-up at 1.6V (due to the battery min is 1.6V)?

(output is 1.8V; 10mA)

thanks~

Regards,

Driscoll

  • 0
    TI__Expert 7925 points
    Hi Driscoll,

    The UVLO prevents the device to start up if the input voltage is lower than 1.7 V typical. Once started, the device can operate down to 1.25 V typical, please refer to "Undervoltage lockout threshold" data in the table in Section 7.5 of the datasheet. 1.6 V is on the edge, do it is not guaranteed that the device will start at that voltage.

    What kind of battery do you use? If the device is turned on only once (when the battery is full and the voltage is >1.8 V) it will operate down to 1.2 V as the battery get discharged if it always remains connected to the battery.

    Best regards,
    Milos
  • 0 in reply to Milos
    Expert 1590 points

    Hi Sir,

    This application is for mouse. So the battery voltage may low to 1.6V and need to start-up.

    Do you has any commend?

    thanks~

    Regards,

    Driscoll

  • 0 in reply to Driscoll Tsai
    TI__Expert 7925 points
    Hi Driscoll,

    Sorry, currently we do not have a device for which we can guarantee startup at 1.6 V.

    Best regards,
    Milos