Design of buck converter circuits operating in weak-inversion region

A 900-nA quiescent current buck converter is implemented in standard 0.25 mum CMOS technology. The controller's analog subblocks are designed to operate in weak-inversion region to reduce quiescent current. It also implements internal compensation circuit to minimize external passive components...

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Bibliographic Details
Main Authors: Youngkook Ahn, Kitae Kim, Hyunseok Nam, Youngkil Choi, Hyungdong Roh, Jeongjin Roh
Format: Conference Proceeding
Language:English
Subjects:
Buck converters
Capacitors
Circuit noise
Circuit synthesis
CMOS technology
Control systems
DC-DC power converters
Hysteresis
Pulse width modulation
Switching frequency
Online Access:Request full text
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Description
Summary:A 900-nA quiescent current buck converter is implemented in standard 0.25 mum CMOS technology. The controller's analog subblocks are designed to operate in weak-inversion region to reduce quiescent current. It also implements internal compensation circuit to minimize external passive components. In order to reduce the size of an on-chip capacitor, the Miller effect is utilized. The measurement results show the successful operation of the DC-DC converter in extremely low quiescent current.
ISSN:2162-0601
2162-061X
DOI:10.1109/IDT.2008.4802476