DC-DC Converter ICs are devices designed to convert a source of DC (direct current) from one voltage to another. These type of devices are commonly used in portable electronic devices or any other devices that are powered from the battery instead of the external power source. The battery of the device supply power with its own voltage that might not be suitable for all internal circuits. DC-DC converter ICs ensure that required voltage is delivered to each circuit due to its own requirements. Converter ICs can both increase or decrease the voltage within the system, by storing the input energy temporarily and then releasing that to the output at a different level. DC-DC converter ICs also regulate the output voltage and maximise the energy harvest.