Constant On-time Buck Converter with Improved Transient Response

a buck converter and constant on-time technology, applied in the direction of electric variable regulation, process and machine control, instruments, etc., can solve the problems of jittering behavior, poor dc (direct-current) regulation and transient response of conventional cot buck converters

Active Publication Date: 2022-05-12
ELITE SEMICON MEMORY TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This configuration enhances the transient response and stability of the output voltage, providing faster regulation and improved noise immunity compared to conventional COT buck converters.

Problems solved by technology

However, conventional COT buck converter presents a few disadvantages including jittering behavior due to low noise immunity and poor DC (direct-current) regulation and transient response.

Method used

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  • Constant On-time Buck Converter with Improved Transient Response
  • Constant On-time Buck Converter with Improved Transient Response
  • Constant On-time Buck Converter with Improved Transient Response

Examples

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Embodiment Construction

[0012]The present disclosure may be understood by reference to the following detailed description, taken in conjunction with the drawings as described below, and for purposes of illustrative clarity and being easily understood by the readers, various drawings of this disclosure may be simplified, and the elements in various drawings may not be drawn to scale. In addition, the number and dimension of each element shown in drawings are just illustrative and are not intended to limit the scope of the present disclosure.

[0013]Certain terms are used throughout the description and following claims to refer to particular elements. As one skilled in the art will understand, electronic equipment manufacturers may refer to an element by different names. This document does not intend to distinguish between elements that differ in name but not function. In the following description and in the claims, the terms “comprise”, “include” and “have” are used in an open-ended fashion, and thus should b...

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PUM

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Abstract

A COT (constant on-time) buck converter includes a first transistor, a second transistor, a driver circuit, an inductor, a first resistor, a second resistor, a capacitor, a load, and a feedback loop circuit. The feedback loop circuit includes a first switch, a second switch, an error amplifier, a comparator, a frequency locked loop circuit, an inverter and a COT logic circuit. The COT buck converter is able to improve DC (direct-current) regulation efficiency and transient response time.

Description

BACKGROUND OF THE INVENTION1. Field of the Invention[0001]The present invention is related to a COT (constant on-time) buck converter, and more particularly to a COT buck converter with improved transient response.2. Description of the Prior Art[0002]The operation of the conventional buck converter is well known and is described as follows. A conventional buck converter includes a pair of power transistors as switches which are turned on and off to regulate an output voltage to be equal to a reference voltage. More specifically, the power transistors are alternately turned on and off to generate a switching output voltage at a switching output node, also referred to as the switch node. The switch node is coupled to an LC filter circuit including an inductor and a capacitor to generate an output voltage having substantially constant magnitude. The output voltage can then be used to drive a load.[0003]FIG. 1 is a diagram of a conventional buck converter 1 of the prior art. A buck conv...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): H02M3/158H03K5/24G01R19/165H02M1/08
CPCH02M3/158H03K5/24H02M2001/0025H02M1/08G01R19/16538H02M1/0025
InventorHSU, CHE-WEI
OwnerELITE SEMICON MEMORY TECH INC