I would like to use the HMC980 active bias controller to power an LNA that requires a drain voltage of +4.5V, and a gate voltage between -4.5V and -5V. That gate voltage is below the -4V absolute minimum spec of the HMC980. Furthermore, the AN-1363 application note states (pg10) "It is recommended to configure the HMC980LP4E for VNEG values greater than -3.5V".
I've read other questions on the engineer zone that discuss using an external Op-Amp to create voltages higher than -2.5V. Can a similar approach be taken to safely generate more negative voltages that would be suitable for my application?