Basic DC-DC converter ICs selection guide

DC to DC Converter Introduction: In many applications, it is required to convert a fixed-voltage DC source into a variable voltage DC source. Such a circuit which converts DC current from one voltage level to another is called a DC to DC Converter. To match the loads to the power supply, to isolate primary and secondary circuits and to simplify power supply systems, the DC to DC converters are very much needed. The DC to DC converter can step up or step down DC voltage level such that the varying operating voltage levels of different components within the same device can be met. For an example, the switch mode converters used in cellphones and laptops are powered with rechargeable batteries. The individual components such as display, memories, USB drives, etc., within these devices require different operating voltage and current levels. The individual operating needs are met by using the DC to DC converters that converts unregulated DC input voltage into controlled DC output at desired voltage level. Stable regulated output voltage can be achieved through different types of conversion methods such as electronic, linear, switched mode, magnetic, capacitive, etc. The DC to DC Converter can be termed as a DC equivalent to an AC transformer with a continuously variable turn ratio. These converters range from tiny packaged parts with no external componen...