Optimization of Integrated Transistors for Very High Frequency dc-dc Converters

Analytical and Practical Analysis of Switched-Capacitor DC-DC Converters

Switched-capacitor DC-DC converters are useful alternatives to inductor-based converters in many lowpower and medium-power applications. This work develops a straightforward analysis method to determine a switched-capacitor converter’s output impedance (a measure of performance and power loss). This resistive impedance is a function of frequency and has two asymptotic limits, one corresponding ...

A High Efficiency Low-Voltage Soft Switching DC–DC Converter for Portable Applications

This paper presents a novel control method to improve the efficiency of low-voltage DC-DC converters at light loads. Pulse Width Modulation (PWM) converters have poor efficiencies at light loads, while pulse frequency modulation (PFM) control is more efficient for the same cases. Switching losses constitute a major portion of the total power loss at light loads. To decrease the switching losses...

CMOS current-mode analog circuit building blocks for rf DC-DC converter controllers

Conventional switch-mode dc-dc converters are operated at frequencies in the order of hundreds of kHz to single MHz. Switching frequencies in the order of tens of MHz would enable applications of RF converters in low power communications and computing integrated circuits with dynamic voltage scaling. Controllers for these converters would have to operate with a bandwidth in the GHz range. The m...

Design and Optimization of Power MOSFET Output Stage for High-Frequency Integrated DC-DC Converters

A New Shoot through Control Methods for Double Stage Qzsi- Based Dc/dc Converters

This paper presents the simulation of new shootthrough control methods for double stage quasi based Dc/Dc converters with high frequency stepup isolation transformer using matlab Simulink. The major goal is increase efficiency and also increase the stage of Quasi. The new shootthrough technique is used for inversion purpose this reduces the un equal switching frequencies of transistor in double...