Title :
Miniaturized Low-Voltage Power Converters With Fast Dynamic Response
Author :
Giuliano, David M. ; D´Asaro, Matthew E. ; Zwart, Jacob ; Perreault, David J.
Author_Institution :
Lab. for Electromagn. & Electron. Syst., Massachusetts Inst. of Technol., Cambridge, MA, USA
Abstract :
This paper demonstrates a two-stage approach for power conversion that combines the strengths of variable-topology switched capacitor techniques (small size and light-load performance) with the regulation capability of magnetic switch-mode power converters. The proposed approach takes advantage of the characteristics of complementary metal-oxide-semiconductor (CMOS) processes, and the resulting designs provide excellent efficiency and power density for low-voltage power conversion. These power converters can provide low-voltage outputs over a wide input voltage range with very fast dynamic response. Both design and fabrication considerations for highly integrated CMOS power converters using this architecture are addressed. The results are demonstrated in a 2.4-W dc-dc converter implemented in a 180-nm CMOS IC process and co-packaged with its passive components for high performance. The power converter operates from an input voltage of 2.7-5.5 V with an output voltage of ≤1.2 V, and achieves a 2210 W/in3 power density with ≥80% efficiency.
Keywords :
CMOS integrated circuits; dynamic response; power convertors; switched capacitor networks; switched mode power supplies; CMOS power converters; CMOS processes; fast dynamic response; magnetic switch mode power converters; miniaturized low voltage power converters; power 2.4 W; power conversion; size 180 nm; variable topology switched capacitor techniques; voltage 2.7 V to 5.5 V; CMOS integrated circuits; Capacitors; Density measurement; Power system measurements; Prototypes; Switches; Voltage control; Complementary metal??oxide??semiconductor (CMOS); PSIP; merged two-stage; point-of-load; power supply in package; switched-capacitor converter; two-stage;
Journal_Title :
Emerging and Selected Topics in Power Electronics, IEEE Journal of
DOI :
10.1109/JESTPE.2014.2331671