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TPS53355: Soft start time consult

Stanley Dai
Expert 5810 points
Part Number: TPS53355

Hi Team,

Customer is wondering whether our TPS53355 can support flexible soft-start adjustment, except the only four sets(0.7/1.4/2.8/5.6-ms) listed in D/S?

Best,

Stanley  

  • +1
    TI__Guru 56795 points

     

    Not without significant external circuitry. 

    The TPS53355 uses an internal DAC to ramp the reference voltage and selects between the discrete time options listed. 0.7ms, 2x 0.7ms (1.4ms), 4x 0.7ms (2.8ms) and 8x 0.7ms (5.6ms).  Each of the longer times is achieved by dividing the frequency of the clock controlling the DAC.