Fast Transient DC-DC Converter with On-Chip Compensated Error Amplifier
Journal
IEEE Transactions on Circuits and Systems II
Journal Volume
54
Journal Issue
12
Pages
1150-1154
Date Issued
2007-12
Author(s)
Abstract
A fast-transient dc-dc converter with on-chip compensated error amplifier is presented in this paper. The error amplifier uses three transistors and one voltage follower to implement the on-chip current-mode Miller capacitor. Not only on-chip compensated error amplifier is implemented without off-chip components and I/O pins, but also fast-transient response is achieved. Moreover, we accurately decrease the transient response time without suffering from the oscillation issue. Implemented in a 0.35-μm CMOS process, experimental results demonstrate the stability of converters with a little area overhead about 5% larger than that of conventional design. In case of load variations, there is about four times reduction on the dropout voltage compared to that of conventional design. Furthermore, transient speed by our proposed technique is about five times faster than that of conventional control, while the total quiescent current is only increased about 3%. © 2007 IEEE.
Subjects
Current-mode dc-dc converter; Fast-transient response; On-chip compensation
Other Subjects
Buffer amplifiers; DC-DC converters; Errors; Power quality; Conventional control; Conventional design; Current mode; Fast transient response; Miller capacitors; Off-chip components; On chips; Quiescent currents; Transient analysis
Type
journal article