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PMP4497: Configuring for 1.8V

Part Number: PMP4497
Other Parts Discussed in Thread: TPS53632,

This design has the output voltage max at 1.2V, do you have any designs that go from 48V to 1.8V?

It looks like the TPS53632 limits the voltage to 1.2V

  • Can you also comment on why PMP4497 is limited to 1.2 V vout, even though when TPS53632 is limited to 1.52 V

  • Hello Juliana,

    at "standard" controllers min Vin is limited to Vref due to virtual short circuit at OpAmp input;
    this device got some more IP in it. Despite Vref 1.7V the 6-bit VID i/f allows Vout 500mV to 1.52V
    by resolution in 64 steps.

    BUT: another limitation needs to be considered by input voltage, switching frequency and number
    of phases - i.e. at  Fsw 1MHz max. output voltage is 1.28V !

    The spreadsheet helps to figure out the suited Fsw according to needed Vout.

    Best regards, Bernd