The question of linear vs. switching regulators in portable products

Armstrong, Tony
August 2006
Portable Design;Aug2006, Vol. 12 Issue 8, p23
The article presents a comparison between linear regulators and switching regulators, which are used in portable products such as cellular telephones. Switching regulators are more efficient than linear regulators. It uses low-resistance switches and magnetic storage element that reduces power lost in data conversion. A compromise between a linear regulator and conventional switching regulator is the on-chip charge pump. With charge pumps, the external storage element functions as capacitors and not inductors. Having no inductor alleviates any potential electromagnetic interference concerns that could interfere with sensitive response frequency receivers or Bluetooth chipsets.


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