High-Gain Wide-Bandwidth Capacitor-Less Low-Dropout Regulator (LDO) for Mobile Applications Utilizing Frequency Response of Multiple Feedback Loops

作者：Hong Sung Wan^*; Cho Gyu Hyeong^*

来源：IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 2016, 63(1): 46-57.

DOI：10.1109/TCSI.2015.2512702

• Capacitor-less
• high-gain
• low-dropout regulator
• wide-bandwidth
• zero compensation

This paper presents a novel capacitor-less low-dropout regulator (LDO) for mobile applications. The proposed capacitor-less LDO utilizes multiple feedback loops to satisfy several design challenges for some mobile applications which were not considered in the previous capacitor-less LDOs. The proposed LDO has a wide bandwidth of 3.03 MHz at a load current of 150 mA with a bias current of 40 mu A, and the best line and load regulations of 0.0024%/V and 0.0000417%/mA, respectively, which are improvements over previously reported LDOs. This chip has a 100 mV dropout voltage with a 150 mA maximum load current. A total capacitance of 29 pF was used with a chip size of 0.279 mm(2).

• 出版日期2016-1