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TPS60403: About behavior when VIN=0V, VOUT=-5.0V

Tsukui Yusuke
Guru 21930 points
Part Number: TPS60403

Hi,

 

Our customer is evaluating TPS60403.

Then, “-5.0V” is applied to “VOUT of TPS60403” when VIN=0V.

According to the datasheet, absolute maximum ratings of “OUT to GND” is -5.5V to 0.3V so we understand that it has no problem in practical use.

Is my understanding correct?

 

Best Regards,

Yusuke/Japan Disty

 

  • 0
    TI__Expert 4155 points
    Yusuke,

    You are correct that this will not give the device any issues.

    I tested this out and saw that if -5V is applied to Vout when Vin is at 0V, the device will sink ~7mA of current through the Vout pin. Vin and Cfly+ were both at a constant ~0.45V, and Cfly- was at a constant -5V.

    Please let me know if this answers your question.

    Thank you,
    Nick