Design of a CMOS DC-DC converter - adaptive CMOS DC-DC converter for a portable battery powered systems

摘要

In this paper, we describe a CMOS DC-DC converter with a variable output voltage (8-12V @ 100 mA) for a portable battery-operated system applications. The proposed DC-DC converter is used along with a Pulse-Frequency Modulation (PFM) method and consists of a reference circuit, a feedback resistor, a controller, and an internal oscillator. The integrated DC-DC converter with two external passive components (L,C) has been designed and fabricated on a 0.6μm 2-poly, 3-metal CMOS process and could be applied to the Personal Digital Assistants (PDA), Cellular Phone, Laptop Computer, etc.