1. An apparatus comprising: a charge pump circuit, comprising a pump stage configured to at least one of source or sink current to an output node of the pump stage, the pump stage including at least one of: a pullup field-effect transistor (FET), including a drain, a source, and a gate, wherein the drain and source are concurrently switched by separate switches respectively associated with the drain and source to switch the pullup FET between current conducting and non-conducting states with respect to the output node of the pump stage; or a pulldown FET, including a drain, a source, and a gate, wherein the drain and source are concurrently switched by separate switches respectively associated with the drain and source to switch the pulldown FET between current conducting and non-conducting states with respect to the output node of the pump stage.