Abstract
In this paper, an integrated adaptive-output switching converter is proposed. The design employs a one-cycle control for fast line regulation and a single outer loop for tight load regulation and fine tuning. A switched-capacitor integrator is introduced to the one-cycle control to obtain positive integration with a single positive power supply, allowing a standard low-cost CMOS fabrication process. To improve the efficiency, a dynamic loss control technique is presented. The converter was designed and fabricated with 0.35 μm N-well CMOS process. With a supply voltage of 3 V, a voltage ripple of less than ± 20 mV is measured. The maximum efficiency is 92% with a load power of 475 mW. The converter exhibits a tracking speed of 23.75 μs/V for both start-up and reference voltage transitions. The recovery time for a 20% load change is approximately 9.5 μs.
Original language | English (US) |
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Article number | 4595674 |
Pages (from-to) | 1240-1243 |
Number of pages | 4 |
Journal | IEEE Transactions on Very Large Scale Integration (VLSI) Systems |
Volume | 16 |
Issue number | 9 |
DOIs | |
State | Published - Sep 2008 |
Keywords
- Adaptive output
- Dynamic voltage scaling
- One-cycle control
- Switching converter
ASJC Scopus subject areas
- Software
- Hardware and Architecture
- Electrical and Electronic Engineering