| Titre : | Design of digital tri-mode adaptive-output buck–boost power converter for power-efficient integrated systems |
| Auteurs : | Luo, Feng, Auteur ; Ma, Dongsheng, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | IEEE transactions on industrial electronics (Vol. 57 N° 6, Juin 2010) |
| Article en page(s) : | pp. 2151 - 2160 |
| Note générale : | Génie électrique |
| Langues : | Anglais |
| Index. décimale : | 621.38 (Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X) |
| Tags : | Automatic substrate switching circuit (ASSC) Buck-boost converter Digital control Dynamic voltage scaling (DVS) Power-efficient system |
| Résumé : | An integrated buck-boost converter with a tri-mode digital control is presented. It employs an adaptive step-up/down voltage conversion to enable a wide range of output voltage. This is beneficial to the ever-increasing electronic systems that employ dynamic voltage scaling (DVS) techniques for power-efficient operations. Three control modes are employed in the converter to operate jointly and seamlessly for performance optimization during the periods of start-up, steady state, and dynamic voltage/load transient states. To avoid latch-up problem and minimize leakage current, an automatic substrate switching circuit (ASSC) is introduced. The design was fabricated in a 0.35-¿m digital CMOS N-well process, with a die area of 1.3 mm2. It precisely regulates an adaptively adjustable power output from 0.9 to 3.0 V. The maximum efficiency is 96.5%, which is measured at 0.9-V output and 45-mW load power. The efficiency remains above 50% over the entire 800-mW power range. The converter responds to a 45-mA load step transient change within 600 ns. The DVS tracking speed is 37 ¿s/V for a 1-V step-down change and is 150 ¿s/V for a 1-V step-up change. With a line regulation of 20.4 mV/V, the converter functions robustly when the input power source frequently varies between 1.6 and 3.3 V. The ASSC consumes only 88- ¿W static power. |
| DEWEY : | 621.38 |
| ISSN : | 0278-0046 |
| En ligne : | http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5289976 |
