High Efficiency On-Chip CMOS DC-DC Converters for Mixed Analog-Digital Low-Power ICs

Ali NADERI  Abdollah KHOEI  Khayrollah HADIDI  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E87-A   No.2   pp.335-343
Publication Date: 2004/02/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
DC-DC converter,  boost,  buck,  charge pump,  switch capacitor,  power efficiency,  

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Summary: 
In this paper, a new full on-chip high efficiency DC-DC voltage up converter with no inductance element is presented with power efficiency more than 74%. A method in the charge pump is described to have a regulated 3.3 V from 1.5 V for output power 4 mW. For medium power class, 100-200 mW, a boost converter is designed with on-chip inductor for 1.5 V to 3.3 V conversion. A buck converter is also designed for 3.3 V to 1 V conversion with power efficiency 72%. Inductor property of bond-wire is employed in the on-chip inductors. Analysis of efficiency relations and simulation results are presented for 0.35 µm CMOS technology.