In this paper, a new full on-chip high efficiency DC-DC voltage up converter with no inductance element is presented with power efficiency more than 74%. A method in the charge pump is described to have a regulated 3.3 V from 1.5 V for output power 4 mW. For medium power class, 100-200 mW, a boost converter is designed with on-chip inductor for 1.5 V to 3.3 V conversion. A buck converter is also designed for 3.3 V to 1 V conversion with power efficiency 72%. Inductor property of bond-wire is employed in the on-chip inductors. Analysis of efficiency relations and simulation results are presented for 0.35 µm CMOS technology.