A new noise-shaped switched-capacitor DC-DC converter

A DC-DC converter utilized feature of the noise shaped to reduce noise of the DC-DC converter output. The noise almost caused by the switching, and those are very difficult to filter out. As a result, those noises will decay performance of the battery. Those noises also exhibited tones in frequency domain, so employ inherent of the sigma delta controller to suppress tones. Therefore, the prototype regulator can successful suppress tones up to 60 dB in range of 0–500kHz by process TSMC 0.35μm . The output voltage can regulated scope from 1.8v to 3.3v, at the same moment the input voltage range from 4v to 3v for load current up to 200mA.

I. Introduction

THE scope of power management design is very widely, it includes increase or decrease of the power level, power converter, protected overload, and management of system power. In the other word, the goal achieved optimum efficient of power. Due to rapid growth of semiconductor process, consumer electron such as cell phone, Personal Data Access, and note book are widely used by consumer.