In one embodiment, an implantable pulse generator comprises: pulse generating circuitry for generating pulses and delivering the pulses to outputs of the implantable pulse generator; a controller; wherein the pulse generating circuitry comprises a voltage multiplier for multiplying a battery voltage, the voltage multiplier including multiple outputs, wherein a first output of the multiple outputs provides a voltage that is programmably selectable from a plurality of voltages including non-integer multiples of the battery voltage, wherein a second output of the multiple outputs provides a voltage that is a fixed multiple of the battery voltage; wherein the controller controls the pulse generator circuitry to generate a first pulse for stimulation of the patient using a first output of the multiple outputs and controls the pulse generator circuitry to generate a second pulse to discharge output capacitors of residual charge from the first pulse using a second output of the multiple outputs.