Current Mode Control Integrated Circuit with High Accuracy Current Sensing Circuit for Buck Converter

摘要

A current mode control integrated circuit with accuracy current sensing circuit (CSC) for buck converter is presented in this the proposed accurate integrated current sensed inductor with the internal ramp be used for DC-DC converter feedback proposed CSC doesn't need an op amp to implement, and has been fabricated with a standard 0.35μm CMOS process. Simulation result show that the switching converter can be operated up to 1MHZ. The supply is suitable for signal cell lithium-ion battery supply power efficiency is over 85% for supply voltage from 2.5v to 5V and output current is 200mA. The performance of the proposed circuit is the good compared to the other circuits.