Area-Efficient On-Chip DC–DC Converter With Multiple-Output for Bio-Medical Applications

Fan, Shiquan; Xue, Zhongming; Lu, Hao; Song, Yan; Li, Haiqi; Geng, Li

doi:10.1109/tcsi.2014.2334836

Cited by 27 publications

(7 citation statements)

References 25 publications

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“…The biomedical implant systems may require multiple independent regulated voltage sources to power different submodules. In a study presented in [121], a multiple-output LDO (MOLDO) with an off-chip external capacitor has been proposed, where one MOSFET is time-shared by four output legs to produce four individual outputs. These four output terminals are configured with different voltage ratings with a maximum single output voltage of 3 V from an input voltage of 3.3 V. Although the proposed MOLDO can minimize power consumption by providing independent regulated voltage for each sub-modules of an implant system, it suffers from slow settling time and large ripples in the output voltages arising from a small feedback factor.…”

Section: A Low Drop-out (Ldo) Linear Regulatorsmentioning

confidence: 99%

A Comprehensive Review on Rectifiers, Linear Regulators, and Switched-Mode Power Processing Techniques for Biomedical Sensors and Implants Utilizing in-Body Energy Harvesting and External Power Delivery

Roy

Azad

Baidya

et al. 2021

IEEE Trans. Power Electron.

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Section: A Low Drop-out (Ldo) Linear Regulatorsmentioning

confidence: 99%

A Comprehensive Review on Rectifiers, Linear Regulators, and Switched-Mode Power Processing Techniques for Biomedical Sensors and Implants Utilizing in-Body Energy Harvesting and External Power Delivery

Roy

Azad

Baidya

et al. 2021

IEEE Trans. Power Electron.

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“…The gate capacitance of M P is large due to the huge transistor size of this power PMOS to regulate the tremendous amount of current to the output load circuit. M P output impedance, is given by (2), where is the channel length modulation.…”

Section: Proposed Ldo Circuit Design 21 Schematic and Circuit Implementationmentioning

confidence: 99%

“…In recent years, the technology trend in biomedical engineering have tremendously increased the market demand for portable, wearable and implantable devices [1][2][3]. The requirement on complete functional integration semiconductor chip such as Silicon-on-Chip (SoC) in low power environment has becoming more important [4].…”

Section: Introductionmentioning

confidence: 99%

A low quiescent current low dropout voltage regulator with self-compensation

Lee¹,

Sidek²,

Sulaiman³

et al. 2019

Bulletin EEI

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This paper proposed a low quiescent current low-dropout voltage regulator (LDO) with self-compensation loop stability. This LDO is designed for Silicon-on-Chip (SoC) application without off-chip compensation capacitor. Worst case loop stability phenomenon happen when LDO output load current (Iload) is zero. The second pole frequency decreased tremendously towards unity-gain frequency (UGF) and compromise loop stability. To prevent this, additional current is needed to keep the output in low impedance in order to maintain second pole frequency. As Iload slowly increases, the unneeded additional current can be further reduced. This paper presents a circuit which performed self-reduction on this current by sensing the Iload. On top of that, a self-compensation circuit technique is proposed where loop stability is selfattained when Iload reduced below 100μA. In this technique, unity-gain frequency (UGF) will be decreaed and move away from second pole in order to attain loop stability. The decreased of UGF is done by reducing the total gain while maintaining the dominant pole frequency. This technique has also further reduced the total quiescent current and improved the LDO’s efficiency. The proposed LDO exhibits low quiescent current 9.4μA and 17.7μA, at Iload zero and full load 100mA respectively. The supply voltage for this LDO is 1.2V with 200mV drop-out voltage. The design is validated using 0.13μm CMOS process technology.

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“…An isolated DC/DC converter is the key component in these applications to convert the high DC voltage to low voltage, and it should have high efficiency and power density to meet the demanding requirements in terms of heat design and volume. Meanwhile, for some special applications, high, steady and dynamical performance is also required, as in the case of an IC power supply, which should maintain uninterrupted voltage to ensure data security and thus requires high dynamical performance [5], or battery charging which should ensure the control accuracy since the overvoltage or overcurrent could damage the batteries [6][7][8]. Therefore, high efficiency, high power density and high performance are the main goals when developing a DC/DC converter.…”

Section: Introductionmentioning

confidence: 99%

Rectifier Current Control for an LLC Resonant Converter Based on a Simplified Linearized Model

et al. 2018

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In this paper, a rectifier current control for an LLC resonant converter is proposed, based on a simplified, two-order, linearized model that adds a rectifier current feedback inner loop to improve dynamic performance. Compared to the traditional large-signal model with seven resonant states, this paper utilizes a rectifier current state to represent the characteristics of the resonant states, simplifying the LLC resonant model from seven orders to two orders. Then, the rectifier current feedback inner loop is proposed to increase the control system damping, improving dynamic performance. The modeling and design methodology for the LLC resonant converter are also presented in this paper. A frequency analysis is conducted to verify the accuracy of the simplified model. Finally, a 200 W LLC resonant converter prototype is built to verify the effectiveness of the proposed control strategy. Compared to a traditional single-loop controller, the settling time and voltage droop were reduced from 10.8 ms to 8.6 ms and from 6.8 V to 4.8 V, respectively, using the proposed control strategy.

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Area-Efficient On-Chip DC–DC Converter With Multiple-Output for Bio-Medical Applications

Cited by 27 publications

References 25 publications

A Comprehensive Review on Rectifiers, Linear Regulators, and Switched-Mode Power Processing Techniques for Biomedical Sensors and Implants Utilizing in-Body Energy Harvesting and External Power Delivery

A Comprehensive Review on Rectifiers, Linear Regulators, and Switched-Mode Power Processing Techniques for Biomedical Sensors and Implants Utilizing in-Body Energy Harvesting and External Power Delivery

A low quiescent current low dropout voltage regulator with self-compensation

Rectifier Current Control for an LLC Resonant Converter Based on a Simplified Linearized Model

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