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A 20-V CMOS-Based Monolithic Bidirectional Power Switch

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5 Author(s)
Fu, Y. ; Sch. of Electr. Eng. & Comput. Sci., Central Florida Univ., Orlando, FL ; Cheng, X. ; Chen, Y. ; Liou, J.J.
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Bidirectional power-switching devices are needed in many power-management applications, particularly in lithium-ion battery protection circuitry. In this letter, a monolithic planar bidirectional power switch fabricated with a simplified CMOS technology is introduced. The new four-terminal device provides a blocking voltage greater than 20 V and a low on-resistance in either direction between its two power terminals. Detailed device characterization and analysis reveal that the new device structure has good latch-up immunity even though it comprises several p-n junctions in close proximity. This new CMOS-compatible power switch can be used in discrete form or as part of a power IC

Published in:

Electron Device Letters, IEEE  (Volume:28 ,  Issue: 2 )