High-efficiency low-noise pulse-width modulation DC-DC buck converter based on multi-partition switching for mobile system-on-a-chip applications

作者：An Tai Ji; Ahn Gil Cho; Lee Seung Hoon^*

来源：IET Power Electronics, 2016, 9(3): 559-567.

DOI：10.1049/iet-pel.2014.0731

• DC-DC power convertors
• PWM power convertors
• switching convertors
• system-on-chip
• minimisation
• mobile handsets
• pulse width modulation DC-DC buck converter
• multipartition switching technique
• mobile system-on-a-chip applications
• current driving switch control
• switching noise minimisation
• PWM control
• power efficiency minimisation
• BCD process
• frequency 2 MHz
• size 0
• 18 mum
• current 200 mA
• voltage 1
• 8 V

This study presents a high-efficiency low-noise pulse-width modulation (PWM) DC-DC buck converter based on multi-partition switching for mobile system-on-a-chip applications. A multi-partition switching technique is employed for the control of large current driving switches to minimise the switching noise. In addition, a PWM control with a switching frequency of 2 MHz is applied for the driving of output stage with a heavy load to optimise the power efficiency. The prototype DC-DC buck converter with an active die area of 0.28 mm(2) was implemented using a 0.18 mu m bipolar-CMOS-DMOS (BCD) process. The peak power efficiency is 93%, while supplying an output current of 200 mA and an output voltage of 1.8 V.

• 出版日期2016-3-9