An Efficient Switched-Capacitor DC-DC Buck Converter for Self-Powered Wearable Electronics

被引：50

作者：

Kilani, Dima ^{[1
]}

Alhawari, Mohammad ^{[1
]}

Mohammad, Baker ^{[1
]}

Saleh, Hani ^{[1
]}

Ismail, Mohammed ^{[1
]}

机构：

[1] Khalifa Univ Sci Technol & Res, Dept Elect & Comp Engn, Khalifa Semicond Res Ctr, Abu Dhabi, U Arab Emirates

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS | 2016年 / 63卷 / 10期

关键词：

Power efficiency; power management unit; switched-capacitor dc-dc converter; CIRCUIT; DESIGN; REGULATOR; OPERATION; CMOS;

D O I：

10.1109/TCSI.2016.2586117

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：

This paper introduces an efficient reconfigurable, multiple voltage gain switched-capacitor dc-dc buck converter as part of a power management unit for wearable electronics. The proposed switched-capacitor converter has an input voltage of 0.6 V to 1.2 V generated from an energy harvesting source. The switched-capacitor converter utilizes pulse frequency modulation to generate multiple regulated output voltage levels, namely 1 V, 0.8 V, and 0.6 V based on two reconfigurable bits over a wide range of load currents from 10 mu A to 800 mu A. The switched-capacitor converter is designed and fabricated in 65-nm low-power CMOS technology and occupies an area of 0.493 mm(2). The design utilizes a stack of MIM and MOS capacitances to optimize the circuit area and efficiency. The measured peak efficiency is 80% at a load current of 800 mu A and regulated load voltage of 1 V.

引用

页码：1557 / 1566

页数：10

共 39 条

[11] 20 μA to 100 mA DC-DC Converter With 2.8-4.2 V Battery Supply for Portable Applications in 45 nm CMOS [J].