Title :
4.8 3-phase 6/1 switched-capacitor DC-DC boost converter providing 16V at 7mA and 70.3% efficiency in 1.1mm3
Author :
Karadi, Ravi ; Pique, Gerard Villar
Author_Institution :
NXP Semicond., Eindhoven, Netherlands
Abstract :
In this paper, a 3-phase switched-capacitor (SC) boost converter that uses 2 external floating capacitors to provide 16V output from a 3.3V input is presented. It achieves an efficiency of 70.3% at 7mA load current while the output ripple is 1% of the output voltage. To minimize the size of the capacitors the converter operates at a switching frequency of 6.67MHz. The chip is implemented in a 0.16μm CMOS technology and occupies 1.65mm2. The total volume of the PCB components consisting of the chip in wafer-level chip-scale package (WLSCP) and 4 external SMD capacitors (1 input, 1 output and 2 floating) is only 1.1mm3 making it attractive for space-constrained mobile applications. The volume is more than 15× smaller compared to competitive inductive converters [1-3]. The maximum thickness of the solution is 550μm.
Keywords :
CMOS integrated circuits; DC-DC power convertors; capacitor switching; chip scale packaging; printed circuits; radiofrequency integrated circuits; surface mount technology; switched capacitor networks; switching convertors; wafer level packaging; 3-phase 6-1 switched-capacitor DC-DC boost converter; CMOS technology; PCB component; SC; WLSCP; current 7 mA; efficiency 70.3 percent; external SMD capacitor; floating capacitor; frequency 6.67 MHz; size 0.16 mum; size 550 mum; space-constrained mobile application; voltage 16 V; voltage 3.3 V; wafer-level chip-scale package; CMOS integrated circuits; Capacitors; Logic gates; Power generation; Rails; Switches; Transistors;
Conference_Titel :
Solid-State Circuits Conference Digest of Technical Papers (ISSCC), 2014 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4799-0918-6
DOI :
10.1109/ISSCC.2014.6757352
