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Buck Regulators与集成输出跟踪确保适当的启动/关闭电源轨

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  • 上传时间:2021-09-26
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  • 标      签: 电源轨 电子系统 集成

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Buck Regulators与集成输出跟踪确保适当的启动/关闭电源轨   今天的电子系统板需要多个电源轨电源板上的各种半导体器件和模块。这些包括ICS,如微处理器,FPGAs,存储器和其他组件。通常情况下,非隔离点的负载(DC)降压稳压器或DC / DC转换器用于生成所需的电压为这些设备。随着工艺尺寸更小的趋势,许多这些设备需要多个电压。例如,一个微处理器可能需要1.2 V或更少的核心和2.5 V或更高的电压为I / OS。而转换器的输入电源电压可能是3.3 V或5 V,同时提供这些多个电压,系统设计人员还必须确保电压是在适当的顺序在上电和断电阶段。如果电源线的顺序不正确,可能会导致过多的电流牵引或短路,导致设备故障,并最终系统板,太。   因此,为了避免任何潜在的风险,在系统板上的电源线的测序是至关重要的。有三种不同类型的测序技术,即顺序、比例,同时。在应用三种排序技术中的任何一种之前,用户应该对每一种方法有一个基本的了解,并且知道何时使用一个与另一个方法。应用笔记¹(an04-008),由GE的临界功率产生和题为“多模块排序准则,”提供了帮助,简要论述三测序技术。      TradiTIonally, designers have been building separate on-board circuits to handle this voltage sequencing problem. It is cumbersome, uses more components and board space and is costly and TIme consuming. Lately, however, several power supply makers have been incorporaTIng these techniques on-chip or within the module to make the task easier for system designers, GE CriTIcal Power introduced sequencing called EZ-SEQUENCE in power modules such as TLynx and Austin Mega TLynx. It helps users implement any of the three types of sequencing mentioned above2.   Now, suppliers like Analog Devices, Intersil, and Texas Instruments, to name three, are integrating the power sequencing technique in new generation of integrated buck converters to make the system designer’s task easier. This article will explore these new buck regulators with integrated sequencing in more detail. What is more, to demonstrate this capability, we will also provide some design examples.
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