Design of DC-DC voltage boosted regulator

• Main Authors: Shu-Ting Chung, 鐘淑婷
• Other Authors: Hong-Chin Lin
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/99715493263364512385

碩士 === 國立中興大學 === 電機工程學系所 === 94 === This content of this thesis is to present a charge pump circuit which applied to non-volatile memories with a new proposed regulator. The complete circuit includes a voltage-controlled oscillator, a four-phase generator, a high-amplitude generator, a charge pumping circuit and the new proposed voltage regulator circuit. According to prior literatures, we know that it is required a voltage regulator to control the voltage produced by charge pumping circuit for applications in non-volatile memory. In this thesis, unlike the most popular regulator using comparator to switch the oscillator on or off to regulate the charge pumping circuit, the proposed regulator circuit dynamically adjusts the frequency of oscillator circuit so that the charge pumping circuit can generate the desired constant voltage. This new simple circuit reduces ripples at the output. The DC-DC voltage boosted regulator circuit can generate the output voltages of 7V~9V according to the different reference voltages with the oscillation frequency up to 16MHz, while the output ripple of this circuit is less than 260mV.