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LM22670: LM22670 variable Vout

Joseph Giardina
Prodigy 20 points
Part Number: LM22670
Other Parts Discussed in Thread: LM10011, LM10010

Has anyone variably adjusted the Vout of the LM22670 using a programmable digital pot IC?

I was wondering if the high impedance indicated on the data sheet for the FB pin would prohibit the use of a digital pot to replace RFBB

  • 0
    TI__Mastermind 23835 points
    Hi,

    I think the high impedance on that pin is because of the input impedance of the error amplifier inside the IC. I would doubt that your digital potentiometer impedance is in that range. But in order to change output voltage normally we use LM10010 or LM10011

    Thanks