Journal ArticleDOI
Fast Output Voltage-Regulated PWM Buck Converter With an Adaptive Ramp Amplitude Control
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TLDR
The proposed buck converter can improve the load transient response and the reference tracking speed and the measured maximum power conversion efficiency was 92.6% at 3-MHz switching frequency when input and output voltages are 3.3 and 2 V.Abstract:
This brief presents a pulsewidth modulation buck converter with an adaptive ramp amplitude control. The proposed buck converter can improve the load transient response and the reference tracking speed. A chip was fabricated in a 0.18-μm CMOS technology. Measurement results showed that the overshoot/undershoot at the output during the load transient period was reduced by up to 57% for a 450-mA load current step and that the reference tracking speed was improved by up to 71% for a 1.5-V output voltage change. The measured maximum power conversion efficiency was 92.6% at 3-MHz switching frequency when input and output voltages are 3.3 and 2 V, respectively.read more
Citations
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Journal ArticleDOI
A 10/30 MHz Fast Reference-Tracking Buck Converter With DDA-Based Type-III Compensator
TL;DR: A high-accuracy delay-compensated ramp generator using only low-speed comparators but can work up to 70 MHz is proposed using a differential difference amplifier (DDA) and a new Type-III compensator to reduce the chip area of the compensator by 60%.
Journal ArticleDOI
Adaptive Ramp Technique for Controlling Chaos and Subharmonic Oscillations in DC–DC Power Converters
TL;DR: In this article, an adaptive ramp control strategy with self-tuning offset and amplitude is proposed to suppress chaos and subharmonic oscillations for a wide range of input voltage and loads.
Journal ArticleDOI
A Peak-Capacitor-Current Pulse-Train-Controlled Buck Converter With Fast Transient Response and a Wide Load Range
TL;DR: An accurate discrete iteration model of a PCC-PT controlled buck converter is established, based on which the effects of circuit parameters on the stability of the converter operating in a discontinuous current mode (DCM), mixed DCM-continuous conduction mode (CCM), and CCM are studied.
Journal ArticleDOI
A Fast Response PWM Buck Converter With Active Ramp Tracking Control in a Load Transient Period
TL;DR: A pulse-width modulation buck converter with an active ramp tracking control to achieve a fast load transient response and the performance evaluation results indicated that the proposed buck converter reduced overshoot/undershoot at the output and the recovery time by up to 60.0%.
Journal ArticleDOI
$v^1$ Concept: Designing a Voltage-Mode Control as Current Mode With Near Time-Optimal Response for Buck-Type Converters
TL;DR: In this article, the authors introduced the $v^1$ concept that explains how by only measuring the output voltage, designers have information about almost every signal of the power stage, and explained how to design a traditional type-III voltage-mode control to behave like a current-mode controller with near time-optimal response under load transients.
References
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Journal ArticleDOI
Ripple-Based Control of Switching Regulators—An Overview
TL;DR: An overview of ripple-based control techniques can be found in this paper, where the authors discuss their merits and limitations, and introduce techniques for reducing the noise sensitivity and the sensitivity to capacitor parameters, improving the frequency stability and the dc regulation.
Journal ArticleDOI
Dithering Skip Modulation, Width and Dead Time Controllers in Highly Efficient DC-DC Converters for System-On-Chip Applications
TL;DR: A highly efficient tri-mode DC-DC converter is invented in this paper for system-on-chip (SoC) applications, which is switched to sleeping mode at very light load condition or to high-speed mode at heavy load condition.
Journal ArticleDOI
Area- and Power-Efficient Monolithic Buck Converters With Pseudo-Type III Compensation
TL;DR: In this paper, a pseudo-type III (PT3) compensator was proposed to maintain the fast load transient response of the conventional Type III compensator by adding a high-gain low-frequency path (via error amplifier) with a moderate-gain high-frequencypath (via bandpass filter) at the inputs of PWM comparator.
Journal ArticleDOI
A voltage-mode PWM buck regulator with end-point prediction
TL;DR: The end-point prediction (EPP) scheme for voltage-mode buck regulators is proposed, and the reference-tracking speed using the EPP scheme is faster than the conventional buck regulator by about six times.
Journal ArticleDOI
High-performance error amplifier for fast transient DC-DC converters
TL;DR: A new error amplifier for fast transient response of dc-dc converters has low quiescent current to achieve high power conversion efficiency, but it can supply sufficient current during large-signal operation.
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