Title :
A synchronous boost regulator with PWM/PFM mode operation
Author :
Liou, Wan-Rone ; Chen, Ping-Hsing ; Tzeng, Jiun-Chang
Author_Institution :
Grad. Inst. of Electr. Eng., Nat. Taipei Univ., Taipei, Taiwan
Abstract :
This paper presents a synchronous boost regulator with PWM/PFM mode of operation. It uses synchronous rectification architecture to reduce the conduction loss and improve the efficiency. Furthermore, this paper features a two-level soft-start circuit which prevents the presence of large current generation during system start-up. The simulation results show an efficiency of more than 90% with an input voltage range of 2.7 V~4.2 V and with a load current of 1 mA to 200 mA. This regulator is suitable for ion-battery supply application. It uses TSMC´s 0.35 ¿m 2P4M CMOS process.
Keywords :
CMOS integrated circuits; controllers; PWM-PFM mode operation; TSMC 2P4M CMOS process; conduction loss; current 1 mA to 200 mA; ion-battery supply application; size 0.35 mum; synchronous boost regulator; synchronous rectification architecture; two-level soft-start circuit; voltage 2.7 V to 4.2 V; Batteries; Circuit simulation; Control systems; Energy management; Light emitting diodes; Power system management; Pulse width modulation; RLC circuits; Regulators; Voltage; Current Sensing Circuit; Current-limited PFM mode; PWM mode; Soft-Start Circuit;
Conference_Titel :
ASIC, 2009. ASICON '09. IEEE 8th International Conference on
Conference_Location :
Changsha, Hunan
Print_ISBN :
978-1-4244-3868-6
Electronic_ISBN :
978-1-4244-3870-9
DOI :
10.1109/ASICON.2009.5351401
