一、引言 集成电路技术的迅速发展,已有可能将几十万个元件集成在一个芯片上。从而为系统集成带来了希望,在一个电子系统中。除了需要工作在标准5V电压的逻辑电路之外,还经常需要输出端具有足够的电压电流驱动能力以驱动各种外部负载。以往的作法是将标准电压工作的控制电路与分立的功率元件在外部连接,这不仅削弱了集成电路的优势,而且带来体积大,成本高,噪声干扰等问题。 I. INTRODUCTION The rapid development of integrated circuit technology has made it possible to integrate hundreds of thousands of components on a single chip. Thus bringing hope for system integration in an electronic system. In addition to operating on a standard 5V voltage logic, it is often necessary for the output to have sufficient voltage-to-current drive capability to drive various external loads. In the past, the standard voltage operation of the control circuit and discrete power components in the external connection, which not only weakened the advantages of integrated circuits, but also bring bulky, costly, noise and other issues.