Programmable Charge Pump

Charge Pump is a circuit capable to scale up and down the output level compares to DC supply voltage. A buck converter (down converter) has low output voltage and boost converter (up converter) has high output voltage. In battery a operated hand held device it is frequently required to boost up and down the voltage level, charge pump uses a chain of capacitor for charging and discharging. In this work a programming feature have been enabled to scale up or down voltage level. Multiplexer based programming have limitation buck and boost converter function parallel results in high power consumption.