Use of renewable energy sources has been increasing day by day because of its availability in frequent manner and of low cost. These sources are coupled with the various converters to convert dc to ac, ac to dc, ac to ac and dc to dc. Renewable energy sources produces dc output voltage hence, it must be converted into ac output voltage according to various applications. Earlier developed voltage source and current source inverter gives output voltage less than and more than the input voltage but not both. Hence, extra dc-dc converter has been added in the circuit to achieve desired output. Then, Cuk and SEPIC buck-boost converters are derived. But it increases the size and cost of the circuit. An alternative to this, researcher has developed impedance source inverter which is having both voltage buck and boost capability. Again there are various modifications has been carried out by number of researchers with its benefits as well as drawbacks. In this way, this paper presents literature survey of multiple research work with its advantages and disadvantages.