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LM27761: Fixed freq operation

Part Number: LM27761

Dear Team,

My customer also wants to use the LM27761 for sensitive analog system such as this question

Is it possible to force the device to work at fixed freq of ~2MHz even at light loads ?

Would increasing the load at the output guarantee high freq operation ?

What is roughly the load we will need ?



  • Hi Nir,

    It won't be possible to force this device into fixed frequency of 2MHz at light loads.

    Higher load current can guarantee high freq operation.

    The output impedance of the charge pump is a function of the switching frequency. The load at which the output impedance doesn't decrease anymore indicates fixed frequency operation.

    Best regards,