Paper Info
Title
EMC influence of the charge pump in linear regulators - Design, simulation and measurements
Abstract
The charge pump belongs to the most critical blocks for electromagnetic compatibility (EMC) of low dropout linear regulators (LDO) because of its switching nature. The goal of this paper is to contribute charge pump design practice and a prediction method for the LDO EMC performance already in an early design phase. LDO noise coupling mechanisms are analyzed. EMC aware circuit design includes the choice of low noise architectures, the right switching frequency and noise filtering. The derived simulation method shows very good matching with EMC test results for an LDO with two different charge pumps fabricated in 350nm high-voltage BiCMOS technology. For a realistic prediction of the EMC noise magnitude, a relatively simple simulation setup gives results with <;3dBμV accuracy. A trippler current mode charge pump turned out to be well suitable for EMC. Conducted emissions could be predicted and confirmed to be improved by ~50dBμV versus a conventional voltage mode charge pump.
Year
DOI
Venue
2011
10.1109/ISCAS.2011.5937824
Circuits and Systems
Keywords
Field
DocType
BiCMOS integrated circuits,charge pump circuits,circuit simulation,electromagnetic compatibility,integrated circuit design,integrated circuit measurement,integrated circuit noise,power integrated circuits,EMC aware circuit design,LDO noise coupling mechanism,charge pump design,charge pump simulation,electromagnetic compatibility,high-voltage BiCMOS technology,low dropout linear regulators,low noise architectures,noise filtering,prediction method,size 350 nm,switching frequency,trippler current mode charge pump
Capacitor,Computer science,Voltage,Filter (signal processing),Circuit design,Electronic engineering,Integrated circuit design,Electromagnetic compatibility,Charge pump,Integrated circuit,Electrical engineering
Conference
ISSN
ISBN
Citations 
0271-4302 E-ISBN : 978-1-4244-9472-9
978-1-4244-9472-9
0
PageRank 
References 
Authors
0.34
0
2
Name
Order
Citations
PageRank
Juergen Wittmann1103.18
Bernhard Wicht2199.30