Power-supply circuits for ultralow-power subthreshold MOS-LSIs

被引：12
|
作者：
Hirose, Tetsuya [1 ]
Asai, Tetsuya [1 ]
Amemiya, Yoshihito [1 ]
机构：
[1] Hokkaido Univ, Dept Elect Engn, Sapporo, Hokkaido 0600814, Japan
来源：
IEICE ELECTRONICS EXPRESS | 2006年 / 3卷 / 22期
关键词：
ultralow-power; subthreshold LSI; power supply circuit; switched-capacitor converter; series regulator;
D O I：
10.1587/elex.3.464
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A low-voltage power supply circuit is developed for micropower CMOS LSI applications, especially for microwatt smart-sensor LSIs. The circuit consists of a switched-capacitor voltage converter and a series regulator. The switched converter lowers battery voltage 1.5 - 3V to a low voltage of 0.5 - 0.7V to drive the series regulator, and the series regulator provides LSI logic gates with a power voltage of 0.4 - 0.6V such that the logic gates operate in the subthreshold region. In a sample circuit designed to produce a supply voltage of 0.6V, the switched converter lowered a 1.5-V battery voltage to 0.68 V, and the series regulator lowered the 0.68V to 0.6V. The power conversion efficiency of the switched converter was 83%, and the total efficiency was 73%, with a 13 mu A output current.
引用
收藏
页码：464 / 468
页数：5
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