This book introduces power management integrated circuits (IC) design techniques to build green electronics. It offers insights on how the efficiency boosting techniques for power management IC designs work toward society´s quest for higher energy efficiency.This book will introduce various power management integrated circuits (IC) design techniques to build future energy-efficient "green" electronics. The goal is to achieve high efficiency, which is essential to meet consumers´ growing need for longer battery lives. The focus is to study topologies amiable for full on-chip implementation (few external components) in the mainstream CMOS technology, which will reduce the physical size and the manufacturing cost of the devices.Part I: Green Electronics and Power Management.- Green Electronics.- System Power Management.- Part II: Power Management IC Design.- Linear Regulators.- Switching Converters.- Conclusion.