A Low Voltage, Low Ripple, on Chip, Dual Switch-Capacitor Based Hybrid DC-DC Converter

Bhattacharyya, Kaushik; Mandal, Pradip

doi:10.1109/vlsi.2008.59

Cited by 26 publications

(20 citation statements)

References 8 publications

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“…Many analog and digital loads are very sensitive to ripple or noise on the supply rail, so the converters supplying these loads must reduce ripple as much as possible. However, integrated switched-capacitor converters are infamous for their large ripple voltage levels [6]. This section will examine the effects of using an SC converter with multiple interleaved phases on the output voltage ripple.…”

Section: Output Ripple Of Multiphase Convertersmentioning

confidence: 99%

“…For many applications, the required output capacitance would dominate the flying capacitors. Methods of reducing the size of this capacitor are necessary for on-die converters [6].…”

Section: Output Ripple Of Multiphase Convertersmentioning

confidence: 99%

“…The method presented in section 6.1.1 will be used here when considering the devices in table 6.2 and figure 6.2. For the low-power converter, the Coilcraft 0603PS inductor series will be used.…”

Section: Hybrid Switched-capacitor Boost Convertermentioning

confidence: 99%

“…Table 6. 6. Efficiency of ladder converter with 4-10 stages at 10 mW load tation of this hybrid SC-boost converter topology will now be examined as it is used in the MicroGlider project.…”

Section: Hybrid Switched-capacitor Boost Convertermentioning

confidence: 99%

“…Since ∆q is an integrated current (charge flow), it must satisfy KCL for each phase transition: .15) where Q j is the fundamental cut-set matrix for the transition in phase j, and can be found by using the methods in section A.1 or from the identity in equation A. 6.…”

Section: A22 Determining the Charge Multiplier Vectormentioning

confidence: 99%

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A Design Methodology for Switched-Capacitor DC-DC Converters

Seeman¹

2009

227

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While they are only capable of a finite number of conversion ratios, SC converters can support a higher power density compared with traditional converters for a given conversion ratio. Finally, through simple control methods, regulation over many magnitudes of output power is possible while maintaining high efficiency.A complete, detailed methodology for SC converter analysis, optimization and implementation is derived. These methods specify device choices and sizing for each capacitor and switch in the circuit, along with the relative sizing between switches and capacitors. This method is advantageous over previously-developed analysis methods because of its simplicity and the intuition it lends towards the design of SC converters. The strengths and weaknesses of numerous topologies are compared amongst themselves and with magnetics-1 based converters. These methods are incorporated into a MATLAB tool for converter design.This design methodology is applied to three varied applications for SC converters. First, a high-voltage hybrid converter for an autonomous micro air vehicle is described. This converter, weighing less than 150mg, creates a supply of 200V from a single lithium-ion cell (3.7V) to supply the aircraft's actuators. Second, a power-management integrated circuit (IC) is presented for a wireless sensor node. This IC, with a target quiescent current of 1 µA, supplies the system voltages of the PicoCube wireless sensor node. Finally, the initial design of a high-current-density SC voltage regulator is presented for low-footprint microprocessor applications.Professor Seth R. Sanders Dissertation Committee Chair 2

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Section: Output Ripple Of Multiphase Convertersmentioning

confidence: 99%

“…For many applications, the required output capacitance would dominate the flying capacitors. Methods of reducing the size of this capacitor are necessary for on-die converters [6].…”

Section: Output Ripple Of Multiphase Convertersmentioning

confidence: 99%

Section: Hybrid Switched-capacitor Boost Convertermentioning

confidence: 99%

“…Table 6. 6. Efficiency of ladder converter with 4-10 stages at 10 mW load tation of this hybrid SC-boost converter topology will now be examined as it is used in the MicroGlider project.…”

Section: Hybrid Switched-capacitor Boost Convertermentioning

confidence: 99%

Section: A22 Determining the Charge Multiplier Vectormentioning

confidence: 99%

See 3 more Smart Citations

A Design Methodology for Switched-Capacitor DC-DC Converters

Seeman¹

2009

227

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A novel high efficiency low ripple switched-capacitor DC/DC converter

Wang

Changming

Wang

et al. 2012

Analog Integr Circ Sig Process

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This paper presents a new method to improve light load efficiency and minimize output ripple of switched-capacitor (SC) DC/DC converters. In order to improve light load efficiency, this paper proposes adaptive frequency modulation to scale down gate-drive losses as load current reduces. Adaptive duty cycle modulation is proposed to minimize output ripple as the converter works under different gain hopping mode. Furthermore, this work optimized switching frequency, the dead time of 2-phase non-overlapping clocks and switching transistor size for efficiency enhancement. A new compensation circuit is also proposed to make system stable. A transistor level implementation of the proposed SC converter in Chartered 0.35 lm CMOS process is provided. Measurement results shows: maximum ripple voltage is\8 mV and efficiency is up to 87%.

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Frequency tunable low ripple and fast response on-chip DC–DC converter for DVFS

Naidu

Kittur

2016

Analog Integr Circ Sig Process

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A Low Voltage, Low Ripple, on Chip, Dual Switch-Capacitor Based Hybrid DC-DC Converter

Cited by 26 publications

References 8 publications

A Design Methodology for Switched-Capacitor DC-DC Converters

A Design Methodology for Switched-Capacitor DC-DC Converters

A novel high efficiency low ripple switched-capacitor DC/DC converter

Frequency tunable low ripple and fast response on-chip DC–DC converter for DVFS

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