APPLICATION NOTE 146

DC-DC Switch-Mode Power-Supply Controller Drives Regulated Charge Pump


Abstract: Inductor-based switch-mode power supplies can take significant design effort and increase size, especially for generating negative supply currents for op amps or LCD bias. This application note describes how a switch-mode power-supply controller such as the MAX774 and a diode-capacitor network can generate modest negative supply currents without the use of inductors.