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Energy is an ultimate problem facing in Wireless sensor network. Hierarchical routing protocols are the best solution for energy efficiency. In this survey paper, we present various modified type of LEACH hierarchical routing protocol. The ultimate aim of this paper is to discuss how the different LEACH protocols help to improve the life span of the sensor network. In addition, we analyze the factors how the related protocols method tackled the energy issues in WSN for developing low Power Hierarchical Protocol. Furthermore, the merits and demerits of various modified LEACH protocols have been analyzed. This literature survey is helpful to provide ideas for modifying the various LEACH protocol to develop energy efficient protocols.