A synthetic ripple buck converter with dynamic hysteretic band modulation. (7th March 2011)

• Record Type: Journal Article
• Authors: Tsai, C.T.; Chou, H.P.
• Is Part Of: International journal of power electronics. Volume 3:Number 2(2011)
• Page Start: 213
• Page End: 224
• Publication Date: 2011-03-07
• Subjects: DC-DC buck converter -- synthetic ripple hysteresis control -- dynamic hysteretic band modulation; Power electronics -- Periodicals; 621.31705
• Languages: English
• ISSNs: 1756-638X

Abstract

This paper presents an integrated DC-DC buck converter using a synthetic ripple hysteresis control scheme with a feed forward path to define the boundary of hysteresis band. The hysteresis band and the switching frequency are adjustable according to load current changes; therefore, it accelerates regulation and reduces overshoot. Full chip simulation indicated that the output voltage recovery time is shortened within 10 μs for load current transients in the range between 100 mA to 500 mA. The present circuit requires no external compensation capacitors and can be implemented with the modern integrated circuit technology for on-chip regulators.