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TPS63700: Ouput -9 V have start up issue

Part Number: TPS63700

Dears

We have find that with large output capacitor(1000uF), sometimes the device can not start up in low temperature, we think this might related loop compensation, so we would like to know if this device have some simulation model? or is there some internal error amplifier parameters? then we can have some calculation.  thanks

Jun Shen

  • Hi Jun,

    Unfortunately, we do not have a simulation model for this device, as it is a quite old one. 

    Could you please post the scope plots during startup showing the output voltage, VIN pin voltage, and IN pin voltage? Can you also try reducing the value of the resistor between IN and VIN pins to 10 Ω or 0 Ω?

    Best regards,
    Milos

  • Hi Jun,

    Since we switched to internal messages, I will close this thread.

    Regards,
    Milos