| Summary: | 碩士 === 國立臺北科技大學 === 電子工程系 === 106 === The thesis proposes two converters. The first proposed converter is a hysteretic-current-controlled buck converter with OTA-C integral circuit. This proposed OTA-C integral circuit senses the inductor current. To eliminate the spike form the buck converter switches and omit a sample and hold circuit. The hysteretic-current-controlled has a fast transient response. The proposed is implemented with TSMC 0.35um CMOS 2P4M process, and the chip area is 2.1456 mm2. The input voltage range is 3V to 3.6V. When the output voltage is 2.5 V and the output current is 300 mA, the circuit has the highest efficiency of 90.2%.
The second proposed converter is a hysteretic-voltage-controlled buck converter with pseudo-current-sensing techniques. This proposed hysteretic-voltage-controlled can be easily implemented. Which has higher efficiency and faster transient time than hysteretic-current-controlled. The pseudo-current-sensing is able to achieve less power lose and faster transient response than OTA-C integral circuit. The circuit is implemented with TSMC 0.35um CMOS 2P4M process, and the chip area is 2.1456 mm2. The input voltage range is 3V to 3.6V. When the output voltage is 2.5V and the output current is 200 mA, the circuit has the highest efficiency of 91.5%.
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