系统芯片电源管理模块的设计

超深亚微米系统芯片具有规模大，复杂度高，系统时钟频率快的特点。传统的由外部电源直接给芯片供电的方式，由于稳定性等问题往往不能保证芯片正常工作。本文提出了在系统芯片(SOC)中加入电源管理模块，用动态方法对外部电源进行管理的设计思想，达到稳定供电，低电压检测，以及保护随机存储器(RAM)内容等目的。本文给出了电源管理模块的设计方法。电路仿真结果表明当外部电源电压从3．6V降到2．7V时，电源管理模块的输出电压变化为0．2592V。

Design of the Power Management Module Integrated in SOC

SOC (System-on-chip) is one kind of large scale and complex IC driven by high clock frequency. The traditional method of externally providing power to SOC can not guarantee its proper operation because of the unstable external power supply. Accordingly, a scheme is proposed to integrate a power resource management module into SOC to manage the external power resource dynamically as to supply SOC chip with stable power, detect the low voltage and protect the data in RAM from losing. Design methodology of power management module is also given. Circuit simulation result shows that the variation of output voltage of proposed power resource management module is within 0.2592V when external power supply changes from 3.6V to 2.7V.