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A Wide-Load-Range Single-Inductor-Dual-Output Boost Regulator with Minimized Cross-Regulation by Constant-Charge-Auto-Hopping (CCAH) Control

Authors Jing, Xiaocheng HKUST affiliated (currently or previously)
Mok, Philip K.T. View this author's profile
Lee, Ming Chak HKUST affiliated (currently or previously)
Issue Date 2009
Source Proceedings 2009 IEEE Custom Integrated Circuits Conference (CICC' 09), San Jose, CA, USA , 13-16 September 2009, p. 299-302
Summary A novel single-inductor-dual-output (SIDO) boost regulator with constant-charge-auto-hopping (CCAH) control to minimize the cross interference between channels is presented. In order to have a predictable system switching noise spectrum, the switching frequency of the converter is automatically hopped between 1.25MHz and 1.25MHz/N where N = 2 to 5 according to the loads and during transient. A prototype has been fabricated with a 0.35 mu m CMOS process to verify the effectiveness of CCAH control. With 1.8V-2.4V input voltage, two regulated output voltages between 3.0V and 3.6V, each with maximum 250mA driving capability, are provided. Load transient measurements show that the cross-regulation is less than 0.1mV/mA with a 200mA change of load current.
ISSN 0886-5930
ISBN 978-1-4244-4071-9
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Language English
Format Conference paper
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