ANALOG DEVICES ADM8828 handbook

The ADM8828/ADM8829 is a charge-pump voltage inverter that can be used to generate a negative supply from a positive input. Input voltages ranging from +1.5 V to +5.5 V can be inverted into a negative –1.5 V to –5.5 V output supply. This inverting scheme is ideal for generating a negative rail in single power-supply systems.