Design of low-power, fast-transient-response, capacitor-less low-dropout regulator for mobile applications

Moon, Junil; Hyun, Jinhoon; Kim, Soo Won

doi:10.1587/elex.13.20160882

Cited by 7 publications

(5 citation statements)

References 10 publications

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“…Battery-powered devices require energy-efficient, highperformance power management integrate circuits (PMICs) with compact size to extend the battery life. Low dropout regulator (LDO)s with low quiescent current (IQ) have been widely used to extend the standby time of such electronic devices, and to generate highprecision, low-noise supplies [1,2,3,4,5,6,7,8,9,10]. However, lower IQ usually leads to poor load transient response.…”

Section: Introductionmentioning

confidence: 99%

Design of 300nA quiescent current and 300mA load capacity LDO with fast transient response

Yu,

Gao,

Zhang

et al. 2024

IEICE Electron. Express

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This paper presents a low dropout regulator (LDO) with a low quiescent current which helps to extend the standby time of battery-powered electronic devices. By utilizing the switchable bias technique in the error amplifier (EA), the bias current is switched to a higher level to accelerate the transient response under heavy load, while a low bias current is applied to EA to maintain a low quiescent current under light load. High speed current comparators and hysteresis control are combined to ensure fast and stable switching operation of the bias current. Moreover, an inrush current suppression circuit is proposed by recycling the switchable bias in EA. During startup, the bias current of EA can be kept low, and a reduced slew rate can be obtained at the pass gate voltage. The proposed LDO has been fabricated in 0.18-μm CMOS process, The experimental total quiescent current is 300nA under no-load condition. The maximum load current is 300mA. Measurement results show that the LDO can be settled within 8μs for a load current step of 0-50mA. In the startup process, the measured inrush current can be effectively limited.

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Section: Introductionmentioning

confidence: 99%

Design of 300nA quiescent current and 300mA load capacity LDO with fast transient response

Yu,

Gao,

Zhang

et al. 2024

IEICE Electron. Express

View full text Add to dashboard Cite

show abstract

“…Electric vehicles have been widely used because they reduce the use of fossil energy and are conducive to achieving the dual-carbon goal [1][2][3]. Due to the intermittency of photovoltaic and wind power generation, the voltage on the AC side of the grid fluctuates greatly [4][5][6][7], resulting in voltage disturbance on the DC side of the charging pile, which threatens the charging safety of electric vehicles [8][9][10][11]. The dual active bridge DC-DC converter (DAB) is a key device for electric vehicle charging piles, which has the advantages of high power density, high efficiency, bidirectional energy transmission and easy cascade and parallel connection [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Model predictive control strategy based on Kalman filter for dual active bridge converter

Yan,

Hua,

Xun

et al. 2024

IEICE Electron. Express

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With the widespread use of electric vehicles, the large disturbance caused by the uncertainty of the AC side of the power grid will adversely affect the voltage stability of the DC side of the charging pile, which will threaten the charging safety of electric vehicles. In order to achieve fast and adaptive DC voltage regulation under large disturbance, this paper proposes a dual active bridge (DAB) converter control strategy based on Kalman Filter (KF) and Model Predictive Control (MPC). The improved Euler method is used to obtain a more accurate DAB discrete model, and the MPC control system is designed to improve the control accuracy. The best observation results of KF are used as feedforward compensation to improve the accuracy of output voltage regulation and ensure the stability of electric vehicles in the face of various disturbance problems. Finally, the effectiveness of the control strategy is verified by experiment.

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“…The traditional LDO consists of the EA (error amplifier), the power MOS, the feedback resistor network and the bandgap voltage reference circuit. The low quiescent current will restrict the transient response of LDO, and then slow down the transient response speed [6]. It leads to a substantial overshoot or undershoot, even makes the device misoperation or the load damaged.…”

Section: Introductionmentioning

confidence: 99%

High voltage low quiescent current LDO with self-regulation impedance buffer

Tian

Chen

Wang

2023

Journal of Electrical Engineering

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To improve the whole characteristic of the LDO, a low quiescent current structure of high voltage LDO with self-regulation impedance buffer and bandgap amplifier is presented in this paper. With the bandgap amplifier proposed, the function of voltage reference and error amplifier can be achieved simultaneously, which can efficiently reduce the consumption. The load capacitor can be as small as 0.47µF by using the self-regulation impedance buffer and current buffer compensation scheme. The LDO has been implemented in a 0.18 µm process with die size 0.03 mm2 . Without the load, the consumption quiescent current of the LDO is 1 µA. Experimental result shows that the overshoot and undershoot of line transient response are less than 30 mV/V. The load regulation is about 0.1A, and line regulation is about 0.07 mV/V at no load condition.

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Design of low-power, fast-transient-response, capacitor-less low-dropout regulator for mobile applications

Cited by 7 publications

References 10 publications

Design of 300nA quiescent current and 300mA load capacity LDO with fast transient response

Design of 300nA quiescent current and 300mA load capacity LDO with fast transient response

Model predictive control strategy based on Kalman filter for dual active bridge converter

High voltage low quiescent current LDO with self-regulation impedance buffer

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