1 / 8

Low Voltage - Low Dropout Regulator

Low Voltage - Low Dropout Regulator. LDO Character. LDO stands for Low Drop-Out Regulator Minimize the difference between the input and output voltage when it ceases to regulate Provide a relatively simple and inexpensive power management solution. LDO Block Diagram.

pearly
Télécharger la présentation

Low Voltage - Low Dropout Regulator

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Low Voltage - Low Dropout Regulator

  2. LDO Character • LDO stands for Low Drop-Out Regulator • Minimize the difference between the input and output voltage when it ceases to regulate • Provide a relatively simple and inexpensive power management solution

  3. LDO Block Diagram Vout = ((R2+R1)/R2) * Vref

  4. LDO Key Parameters • Dropout Voltage • Load Regulation • Line Regulation • Power Supply Rejection Ratio • Output voltage is controlled by the resistive negative feedback • Input voltage must be greater than the output voltage • Low quiescent current

  5. Low Drop-Out Voltage Regulator Composed of the following: • Voltage Reference • Pass Element • Error Amplifier • Feedback Resistors

  6. Provides a constant output voltage which will be compared with the output voltage from the feedback network Voltage Reference

  7. Error Amplifier Produces an error signal whenever the fed back sensed output differs from the reference voltage Feedback Network Produces the output voltage (voltage divider) Error Amplifier and Resistive Network

  8. PCMCIA Card Cellular Phones Camcorders Cameras DSL/Cable Modems MP3/CD Players LDO Application

More Related