A Boost Converter with 3-6V Input and Fast Transient Digital Control Comprising a 90 ns-Latency Live-Tracking Window ADC.

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Original languageEnglish
Pages130-133
Number of pages4
Publication statusPublished - 2018

Abstract

This paper presents a digitally controlled boost converter IC for high output voltage and fast transient applications. Thus, it is well applicable in automotive and industrial environments. The 3 V-to-6 V input voltage, 6.3 V output voltage, 1 A boost converter IC is fabricated in a 180 nm BCD technology. Digital control enables cost savings, advanced control concepts, and it is less parameter sensitive compared to common analog control. A 90 ns latency, 6-bit delay line ADC operates with a window concept, meeting high resolution requirements, e.g. in car battery applications. An output voltage live tracking is included for extending the ADC conversion window. A charge pump DAC provides high resolution, monotonicity, and short 128 ns conversion time. Further, a standard digital PI controller is enhanced by a simple but effective Δ V/Δt-intervention control. It results in 2.8x reduced output voltage deviations in case of load steps, scaling down the output capacitor value by the same factor.

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A Boost Converter with 3-6V Input and Fast Transient Digital Control Comprising a 90 ns-Latency Live-Tracking Window ADC. / Quenzer-Hohmuth, Samuel; Ritzmann, Steffen; Rosahl, Thoralf et al.
2018. 130-133.

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