NDLI: Frequency compensation circuit for adaptive on-time control buck regulator

Content Provider	IET Digital Library
Author	Shi, Ling Feng Xu, Ling Yan
Abstract	A novel frequency compensation circuit for adaptive on-time control buck regulator is presented in this study, which mainly applied to provide power supply for double data rate synchronous dynamic random access memory system. Typical ripple control regulator possesses the advantage of fast transient response and unconditional stability. However, it suffers significant steady-state switching frequency variation when the input voltage and output voltage are varied. The on-time is directly proportional to the output voltage and inversely proportional to the input voltage so that the regulator can dynamically adjust the turn-on time of power switches according to the changes of input voltage and output voltage in steady-state operation by adaptive on-time control. Finally, an approximately fixed switching frequency is achieved. However, the variation of the switching frequency with load current still exists. Through the implementation of the frequency compensation circuit, the switching frequency variation caused by the load current variation can be effectively reduced in order to obtaining a more fixed switching frequency. The adaptive on-time control regulator with frequency compensation has been successfully fabricated with 0.35 µm 30 V complementary double-diffused metal oxide semiconductor process and full chip test results are provided to verify the proposed method in this study.
Starting Page	1805
Ending Page	1809
Page Count	5
ISSN	17554535
Volume Number	7
e-ISSN	17554543
Issue Number	Issue 7, Jul (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/7/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2013.0714
Journal	IET Power Electronics
Publisher Date	2014-02-27
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Adaptive Control Adaptive On-time Control Buck Regulator Circuit Stability CMOS Integrated Circuit CMOS Memory Circuit Compensation Complementary Double-diffused Metal Oxide Semiconductor Process Controller Double Data Rate Synchronous Dynamic Random Access Memory System Frequency Compensation Circuit Frequency Control Full Chip Test Integrated Circuit Testing Layout Load Current Variation Memory Circuit Modelling And Testing Power Electronics Power Supply Power Switch Random-access Storage Relay And Switches Ripple Control Regulator Self Adjusting Control System Semiconductor Integrated Circuit Design Semiconductor Storage Size 0.35 Mum Stability Steady-state Switching Frequency Variation Supervisory Circuit Switched Mode Converter Transient Response Voltage 30 V Voltage Control Voltage Regulators
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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