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电感器在完成基于功率模块的解决方案中的作用
电子元件制造商在整合开关DC-DC变换器的离散元件，取得了巨大的进步（‘regulator”）为一个模块。然而，有些人还没有完全完成这项工作。电感是调节器拓扑的一个关键部分，通常需要作为外部元件来添加。
这是因为线圈不容易缩小到其他部件的小型化。尽管如此，一批选定的硅供应商已经面临挑战，一些新的设计，使电感器“从冷”，现在可用。
本文介绍了电感器的作用，并考虑了为什么难以将其包括在模块化封装中。本文将引导来看看电源模块制造商如线性技术，Intersil，三角洲已经解决的问题，在其最新的电源包（PSIP）设计。
Not quite total integraTIon
IntegraTIng the consTItuent parts of switching regulator makes a lot of sense. TIme-to-market， overall cost （design time plus components）， size constraints， reliability， and low noise are among the advantages of a modular versus a discrete regulator design （see previous Power TechZone article）
Manufacturers such as Fairchild， Maxim， and Texas Instruments have reacted to market demand by introducing a slew of modular power supplies that make it comparatively easy for a designer to add a regulator to his or her latest product.
However， devices such as Fairchild’s FAN8303 buck regulator （Figure 1） or Maxim’s MAX8625A buck regulator are not totally integrated. The inductor （Figure 2）， a component that has stubbornly disobeyed Moore’s Law and remained bulky， is not included in the package. The designer is left to chose a device， find space for it on the board， and connect it to the power supply module. Often that is not a problem， but there are other occasions when this is far from ideal.
