Low-power, Low Voltage Peak Current Mode The Boost Converter Is The Stability Of Research And Design

With the system on chip integration of digital processing unit increasing, such as the DSP, ARM into a single chip, there are higher requirement on load capacity and efficiency of power supply unit. In the development of battery-powered portable electronic devices such as mobile phones, MP4, EBOOK, GPS and other low-power products, if the power system design is unreasonable, it will affect the entire system architecture, product feature set, the software design and power allocation framework. In most cases, portable products are battery-powered, internal (ie, battery back-end) power management with DC/DC and the LDO implemented in two ways, each with advantages and disadvantages. Normal status, DC_ DC module can provide a stable voltage to the system and maintain its high conversion efficiency, low heat. LDO module has low quiescent current, low noise, high PSRR (power supply ripple rejection ratio)Modeling is the foundation of system analysis, the performance of DC-DC system model affect some system parameters in deep, such as respond time-, stability and so on. Voltage Mode,Peaking Current Mode and Average Current Mode are used widely in DC-DC Converter with each characteristics. This thesis takes Boost topology as an example, focusing on how to realize a steady and high efficient DC-DC Converter.Each losses source of DC-DC Converter is studied and measurements are proposed in this dissertation in order to improve the efficiency. New digital controllers according to different loads are proposed to do this job.A Boost,Peak Current Mode DC-DC Converter operate is designed based on Tower 0.18μstandard CMOS process. According to Hspice simulation result, the system operation stably, with other performance required.