Integrated Cold Start of a Boost Converter at 57 mV Using Cross-Coupled Complementary Charge Pumps and Ultra-Low-Voltage Ring Oscillator

Bose, S.; Anand, Tejasvi; Johnston, Matthew L.

doi:10.1109/jssc.2019.2930911

Cited by 61 publications

(42 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…11b, which reports η as function of the output power density of some of the cited works, the proposal is allocated in the middle zone, while the best results are outperformed by CP introduced in [34]. Finally, in comparison with [20] and [26], which can work in sub-100 mV, the proposed one generates a higher output power and shows a better VCE, respectively.…”

Section: Simulation Results and Comparisonmentioning

confidence: 97%

“…Content may change prior to final publication. The clock signal is assumed to be generated by another block that can be implemented adopting ring oscillators, as done in [20], or LC tank oscillators, as done in [17]. Clock signals VCK and VCKn are assumed to be non-overlapping.…”

Section: Simulation Results and Comparisonmentioning

confidence: 99%

“…In literature different papers have treated CPs able to work with near-and sub-100-mV input voltage [20], [27], [43], [53]. A common adopted strategy is to boost the control signal of the switches to get rid of the drawbacks due to the threshold voltage.…”

Section: Introductionmentioning

confidence: 99%

“…A common adopted strategy is to boost the control signal of the switches to get rid of the drawbacks due to the threshold voltage. As an example, in [20] the cold-start circuit is constituted by two complementary CPs to boost the gate signals of the MOSFETs exploited as switches. In [27] clock signals are boosted from -VIN to 2 VIN to achieve the double effect of reducing the number of stages and the onresistance of the switches.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Subthreshold Cross-Coupled Hybrid Charge Pump for 50-mV Cold-Start

2020

View full text Add to dashboard Cite

In this paper, a fully-integrated switched-capacitor DC-DC converter based on a Dickson charge pump able to work with input voltage levels that force the transistors working in subthreshold region is presented. The proposed topology exploits resistors in the charge transfer switch in order to overcome the limits of conventional solutions when working in the subthreshold regime. Post-layout simulations using a 28-nm FD-SOI technology show that the CP can boost an input voltage as low as 50 mV to a maximum output voltage of 270 mV, keeping a settling time about 25X lower than the conventional dual-branch cross-coupled charge pump and a voltage conversion efficiency higher than 76%. The proposed topology is particularly suited for the start-up of power management units supplied by thermoelectric generators.

show abstract

Section: Simulation Results and Comparisonmentioning

confidence: 97%

Section: Simulation Results and Comparisonmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Subthreshold Cross-Coupled Hybrid Charge Pump for 50-mV Cold-Start

2020

View full text Add to dashboard Cite

show abstract

“…As a matter of fact, several low-input boost dc-dc converters have been reported [5][6][7][8][9][10][11][12][13]. As the output voltage of a thermoelectric generator (TEG) for available thermal gradients (2-3 K) is <100 mV [5,6], the startup schemes for TEG generally need extra external components, complicated assisting circuits and expensive process manufacture [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

10 MHz boost converter with subthreshold voltage startup and predictive dead‐time techniques for energy‐harvesting systems

Huang

Liao

Liu

2020

IET Power Electronics

View full text Add to dashboard Cite

A 10 MHz synchronous boost converter with the subthreshold startup scheme and predictive dead-time control for energy-harvesting systems is presented in this study. The input feed-forward technique is adopted to achieve a fast line response, and a three-stage startup technique is proposed to realise subthreshold voltage startup without using any extra startup circuits or special devices. Moreover, the efficiency of the high-frequency converter can be improved by the proposed predictive dead-time control with a high resolution of ∼300 ps. The proposed converter is implemented in a standard 0.18 μm complimentary metal oxide semiconductor process and occupies a die area of 1.4 × 1.5 mm 2. Experimental results show that the input voltage ranges from 0.3 to 1.5 V at 1.8 V output, and the minimum startup voltage is 0.3 V. Under V IN = 1.5 V, V OUT = 1.8 V and 150 mA load, the power efficiency can be improved by 2.6% because of the proposed predictive dead-time control. The peak efficiency can reach 90.7% under V IN = 1.5 V. The line transient response can be improved with small overshoot voltage at the output.

show abstract

A wide input range, 94% peak efficiency auto‐select multi‐mode boost converter for thermoelectric energy harvesting

Hajiakbari,

Ashraf

2023

Circuit Theory & Apps

View full text Add to dashboard Cite

SummaryIn this paper, a high‐efficiency DC–DC boost converter is proposed for thermal energy harvesting systems. The converter's efficiency is improved using a low‐power digital operating mode detector circuit. The operating mode detector circuit changes the converter's operating mode between the continuous conduction mode (CCM) and discontinuous conduction mode (DCM) at a specific input voltage (boundary input voltage), which reduces the total losses, thus improves the efficiency and increases the input voltage range. Besides, the proper boundary input voltage is calculated as a function of the boost converter's parameters. Finally, the proposed converter is designed in a standard 0.18 μm CMOS process. Simulation results show that the peak efficiency of the converter can be up to 94%, 60.4%, and 35% at 300, 20, and 15 mV of the open‐circuit voltage, respectively.

show abstract

Integrated Cold Start of a Boost Converter at 57 mV Using Cross-Coupled Complementary Charge Pumps and Ultra-Low-Voltage Ring Oscillator

Cited by 61 publications

References 29 publications

A Subthreshold Cross-Coupled Hybrid Charge Pump for 50-mV Cold-Start

A Subthreshold Cross-Coupled Hybrid Charge Pump for 50-mV Cold-Start

10 MHz boost converter with subthreshold voltage startup and predictive dead‐time techniques for energy‐harvesting systems

A wide input range, 94% peak efficiency auto‐select multi‐mode boost converter for thermoelectric energy harvesting

Contact Info

Product

Resources

About