Check patentability & draft patents in minutes with Patsnap Eureka AI!

Low drop-out voltage regulator and load current tracking compensation method thereof

A low-dropout voltage regulator, current tracking technology, applied in instruments, regulating electrical variables, control/regulating systems, etc., can solve the problems of frequency response influence, control loop interference, affecting LDO output stability, etc., to achieve frequency response The effect of feature enhancement

Active Publication Date: 2017-05-03
NXP BV
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, in some applications, the actual variation range of the load is relatively large. For a given LDO, this will cause the fluctuation range of its output current to exceed the stable operating range of its loop, and the load and the control loop of the LDO itself mutual interference
In these cases, the frequency response of the LDO will be affected by the load, which in turn affects the stability of the LDO output

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Low drop-out voltage regulator and load current tracking compensation method thereof
  • Low drop-out voltage regulator and load current tracking compensation method thereof
  • Low drop-out voltage regulator and load current tracking compensation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] figure 1 What is shown is a schematic structural diagram of a low dropout voltage regulator in an embodiment. The low dropout regulator (LDO) 100 includes an error amplifier 102, an output circuit 104, a current tracking circuit 106, a load tracking compensation circuit 108 and the like.

[0025] The error amplifier 102 includes a positive input terminal, a negative input terminal and an output terminal. Wherein, the positive input terminal of the error amplifier 102 is connected to the reference voltage V ref , the output terminal is coupled to the output circuit 104 .

[0026] In one embodiment, the reference voltage V ref is provided by a bandgap reference voltage source (not shown in the figure), and the bandgap reference voltage source can be implemented in various known ways.

[0027] The output circuit 104 is connected to the output terminal of the error amplifier 102 for receiving the output of the error amplifier 102 and outputting corresponding output curr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A low drop-out voltage regulator comprises an error amplifier, an output circuit, a current tracking circuit, and a load tracking compensation circuit. The error amplifier comprises a positive input end, a negative input end and an output end, wherein the one of the positive input end and the negative input end is connected with reference voltage. The output circuit is connected with the output end of the error amplifier and an external load, and is configured to generate output current and output voltage to the external load. The current tracking circuit is connected with the output circuit, and is configured to receive the output current and generate tracking current that tracks the output current. The load tracking compensation circuit is connected with the current tracking circuit and the output circuit, and is configured to generate control voltage on the basis of the tracking current and to send the control voltage to the output circuit. The invention also provides a load current tracking compensation method of the low drop-out voltage regulator.

Description

technical field [0001] The invention relates to a low-drop voltage regulator. In particular, it relates to a low-dropout regulator capable of tracking and compensating load current, and a corresponding method for tracking and compensating the load current. Background technique [0002] A low drop-out voltage regulator (Low Drop-out Voltage Regulator, LDO) is often used as a power converter in a high-performance power circuit, which has the characteristics of high efficiency and low noise. Due to these characteristics of the LDO, it is widely used in various devices, such as mobile phones, instruments, portable computers and so on. [0003] A typical LDO includes an error amplifier, an output stage, and a sampling feedback circuit. The sampling feedback circuit samples the output voltage generated by the output stage and feeds it back to the error amplifier, thereby forming a voltage feedback loop to the LDO to stabilize the output of the LDO. [0004] In the application, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G05F1/56G05F3/26
CPCG05F1/575
Inventor 卿健万明亮黄水文
Owner NXP BV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com