Title :
Low dropout voltage regulator for wireless applications
Author :
Yuan, Shan ; Kim, Bruce C.
Author_Institution :
Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA
Abstract :
Low dropout voltage regulators (LDO) are widely used in portable communication products such as cellular phones, pagers, and laptops. In this paper, we present a wide range load (100 mA) LDO designed with 0.25 μm CMOS process. By using a fast transient loop, we obtained high performance in transient response and output stability. Due to the improved transient response, the value of the output capacitor can be decreased. This allows us to integrate the capacitor within the LDO chip. Additional benefit of this approach is that we eliminate the equivalent series resistance. Therefore, the system stability is independent of it.
Keywords :
electric resistance; stability; telecommunication power supplies; transient analysis; transient response; voltage control; voltage regulators; 0.25 micron; 100 mA; cellular phones; equivalent series resistance; fast transient loop; laptops; low dropout voltage regulator; output capacitor; output stability; pagers; portable communication products; system stability; transient response; Batteries; Capacitors; Circuit stability; Feedback loop; Frequency; Low voltage; Photonic band gap; Power transistors; Regulators; Transient response;
Conference_Titel :
Power Electronics Specialists Conference, 2002. pesc 02. 2002 IEEE 33rd Annual
Print_ISBN :
0-7803-7262-X
DOI :
10.1109/PSEC.2002.1022489
