A wide output range voltage-mode buck converter with fast voltage–Tracking speed for RF power amplifiers. Issue 1 (January 2015)

• Record Type: Journal Article
• Authors: Xu, Shen; Sun, Fengfeng; Yang, Miao; Han, Caixia; Sun, Weifeng; Lu, Shengli
• Is Part Of: Microelectronics journal. Volume 46:Issue 1(2015)
• Page Start: 111
• Page End: 120
• Publication Date: 2015-01
• Subjects: Microelectronics -- Periodicals; Microélectronique -- Périodiques; Microelectronics; Electronic journals; Journals - contents and abstracts; Periodicals; 621.3805
• DOI: 10.1016/j.mejo.2014.11.002
• Languages: English
• ISSNs: 0959-8324

Abstract

<abstract abstract-type="author" id="ab0005"> <title id="sect0005">Abstract</title> <sec> <p id="sp0100">A high switching frequency voltage-mode buck converter with fast voltage-tracking speed, wide output range and PWM/PSM control strategy for radio frequency (RF) power amplifiers (PAs) has been proposed. To achieve the fast voltage-tracking speed, the maximum charging and discharging current control method has been used, and the filter inductor and capacitor values are reduced. A novel compensated error amplifier (EA) is presented to realize the wide output range. The investigated converter has been fabricated with GF 0.35 μm CMOS process and can operate at 5 MHz with the output voltage range from 0.6 V to 3.4 V. The experimental results show that the voltage-tracking speed can achieve 8.8 μs/V for up-tracking and 6 μs/V for down-tracking. Besides, the recovery time is less than 8 μs when the load change step is 400 mA.</p> </sec> </abstract>