How can the charge pump IC minimize power consumption?
Using pulse frequency modulation (PFM) the IC pumps only when charge must be delivered to maintain output regulation. When the output is above the target regulation voltage, the IC idles and consumes minimal supply current because the charge stored in the output capacitor supplies the load current. As this capacitor discharges and the output voltage falls below the target regulation voltage, the charge pump activates, and delivers charge to the output. This charge supplies the load current and boosts the voltage on the output capacitor.
