Title :
Near-threshold startup integrated boost converter with slew rate enhanced error amplifier
Author :
Wong, Yat-To ; Ng, Chik-Wai ; Wan, Ho-Ming ; Kwong, Kwok-Kuen ; Lam, Yat-Hei ; Ki, Wing-Hung
Author_Institution :
Portable Analog & Mixed Signal Design, Hong Kong Appl. Sci. & Technol. Res. Inst. (ASTRI), Hong Kong, China
Abstract :
An integrated voltage-mode boost converter that starts up at 0.9 V is successfully implemented in a standard 3.3/5 V 0.6 mum CMOS process with Vtn=0.7 V and |Vtp|=0.8 V. The special features are: (1) a near-threshold soft-start circuit that keeps maximum in-rush current under control; (2) a slew rate enhanced error amplifier that achieves stable response over a wide range of supply voltage; and (3) a capacitor multiplier in implementing the compensation capacitor that reduces die area. Maximum efficiency of 93% is achieved at an output power of 260 mW.
Keywords :
CMOS integrated circuits; amplifiers; error analysis; power convertors; CMOS process; capacitor multiplier; compensation capacitor; error amplifier; maximum in-rush current; near-threshold soft-start circuit; near-threshold startup-integrated boost converter; power 260 mW; size 0.6 mum; slew rate; voltage 0.7 V; voltage 0.8 V; voltage 0.9 V; CMOS process; CMOS technology; Capacitors; Delay; Driver circuits; Neodymium; Oscillators; Power generation; Signal design; Threshold voltage;
Conference_Titel :
Circuits and Systems, 2009. ISCAS 2009. IEEE International Symposium on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-3827-3
Electronic_ISBN :
978-1-4244-3828-0
DOI :
10.1109/ISCAS.2009.5118286
