Integrated Low Dropout Regulator with Fast Transient and Dynamic Output

• Main Authors: Li-Wen Wang, 王俐文
• Other Authors: Po-Chiun Huang
• Format: Others
• Language: en_US
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/28481101799488429762

碩士 === 國立清華大學 === 電機工程學系 === 96 === To guarantee the loop stability, the bandwidth of the conventional linear regulator is limited since the load current is not fixed. We expect to overcome the bottleneck so that the regulator can process high bandwidth and good transient response at the same time. The research demonstrates that an integrated LDO linear regulator with fast dynamic output. The design is suitable for SoC applications because it can help the integration of elements and their power devices and the optimization of system operation. The regulator design employs a replica-biased feature. By using two loops, we achieved a regulator with good AC response and fast transient response. It can provide multiple output voltages for different requirements of loads, and can be switched fast between active mode and suspend mode. The regulator was fabricated in a 0.18 μm CMOS technology with output voltages from 1.2V to 1.5V and a 120mV dropout voltage.