An on-chip ripple compensation circuit for constant on-time(COT)Buck converter was designed in a0.18μm BCD technology.The disadvantages of using electrolytic capacitor as output capacitor and off-chip ripple compensation circuit were analyzed. A novel ripple compensation circuit was designed to overcome these shortcomings.Cadence and Hspice softwares were used for the circuit design and simulation.Under the typical operating conditions of chip system,the simulation results indicated that the ripple of outpu...