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VLSID
2005
IEEE

A High-Efficiency, Dual-Mode, Dynamic, Buck-Boost Power Supply IC for Portable Applications

13 years 9 months ago
A High-Efficiency, Dual-Mode, Dynamic, Buck-Boost Power Supply IC for Portable Applications
Abstract—Integrated power supplies are critical building blocks in stateof-the-art portable applications, where they efficiently and accurately transform a battery supply into various regulated voltages, as required by their loads. This paper presents a novel low voltage, dual-mode, buck-boost converter IC targeted for dynamic supplies of linear RF power amplifiers (PAs) in wireless handsets. Maintaining high efficiency of the converter over a wide loading range is critical for improving battery life in such systems. The use of a novel supply voltage using adaptive on time control for pulse-frequency-modulation (PFM) mode achieves an accurate output ripple voltage, not to mention higher efficiency under light loads, which is important in portable applications. In the high-power mode, the converter is operated in a modified pulse-width-modulated (PWM) control, where its operation is changed adaptively between the buck, buck-boost, and boost regions, thereby saving unnecessary switchin...
Biranchinath Sahu, Gabriel A. Rincón-Mora
Added 25 Jun 2010
Updated 25 Jun 2010
Type Conference
Year 2005
Where VLSID
Authors Biranchinath Sahu, Gabriel A. Rincón-Mora
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