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A Fully Integrated CMOS 800mW Four-Phase Semiconstant ON/OFF-Time Step-Down Converter

A Fully Integrated CMOS 800mW Four-Phase Semiconstant ON/OFF-Time Step-Down Converter,10.1109/TPEL.2010.2057445,IEEE Transactions on Power Electronics

A Fully Integrated CMOS 800mW Four-Phase Semiconstant ON/OFF-Time Step-Down Converter   (Citations: 4)
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Journal: IEEE Transactions on Power Electronics - IEEE TRANS POWER ELECT , vol. 26, no. 2, pp. 326-333, 2011
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    • ...Another approach, as shown in Fig. 4b, is to incorporate the inductor in the chip’s metal stack [6][7]...
    • ...In Fig. 19 [7] it is shown how a four phase buck converter is implemented with the SCOOT control technique...

    M. Steyaertet al. DC-DC converters: From discrete towards fully integrated CMOS

    • ...Another approach, as shown in Fig. 4b, is to incorporate the inductor in the chip’s metal stack [6][7]...
    • ...In Fig. 19 [7] it is shown how a four phase buck converter is implemented with the SCOOT control technique...

    M. Steyaertet al. DC-DC converters: From discrete towards fully integrated CMOS

    • ...In [4] an 800mW Bulk CMOS inductive converter is presented, but due to the inductor quality it does not achieve high power densities...
    • ...linear regulator is also included in Fig. 4 and it clearly shows that this prototype converter outperforms a linear regulator over the entire load range extending battery lifetime up to 36%, according to the Efficiency Enhancement Factor (EEF) introduced in [4], when delivering 1W. The control loop was closed externally by adjusting a reference voltage that controls the switching frequency of the converter...
    • ...Finally a comparison between recently published state-ofthe-art integrated DC-DC step-down converters is summarized in Table 1 and shows that this work improves upon [4] and establishes the high output powers on top of equivalent power densities compared to [2] although no special technology options are used in this work and no high capacitance density features are available as is usually the case in the advanced nanometer technology [9] ...
    • ...SPECIFICATION COMPARISON TO PRIOR ART Reference [2] [3] [4] [10] This work...

    Hans Meyvaertet al. A monolithic 0.77W/mm2 power dense capacitive DC-DC step-down converte...

    • ...Different designs in literature demonstrate that relatively high power density can be achieved but at the cost of efficiency [3] [4] [5]...
    • ...topology background. It is shown that this work improves upon [5] and achieves a high output power on top of a power density comparable to [ 10], although no special technology options were used in this work and no high capacitance density feature was available as is the case in advanced nanometer technology nodes [20] as used in [10]...

    Hans Meyvaertet al. A 1.65W fully integrated 90nm Bulk CMOS Intrinsic Charge Recycling cap...

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