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ADF4372 3.3V Operation

I have two questions:

1. What voltage is VCC_REG_OUT?

2. What changes to the circuit need to be made to change from VCC_VCO=5V to VCC_VCO=3.3V operation?



  • Hi Michael,

    We recommend using an external LDO for 3.3V operation too. For this reason, VCC_REG_OUT should be left open. All needed is connecting 3.3V supply to VCC_VCO and VCC_LDO pins for hardware side. The ALC settings should be set for 3.3V operation when programming the part.