科研之友
微信
新浪微博
Facebook
分享链接
摘要
This letter presents a buck converter for the dynamic voltage scaling systems where the supply voltage is dynamically adjusted to the minimum value required by the applications. A voltage controlled delay line based PWM controller is designed to simplify the structure for the purpose of energy saving. In order to speed up the transient response, the pseudo-continuous conduction mode and the pulse division technique are used. When the switching frequency f is 800 kHz and the input voltage is 3.3V, the output voltage of the converter is dynamically modulated from 1.7V to 2.8V according to a changeable reference clock f(ref) from 70 MHz to 140 MHz. A fast transient response of 5.27 mu s for a step voltage change from standby to the maximum operation is obtained. The output voltage ripple is less than 2 mV.
- 出版日期2009-11-10
- 单位西安交通大学
