太赫兹科学与电子信息学报Issue(3)：484-488,5.DOI:10.11805/TKYDA201303.0484
一种用于大功率音频功放的高稳定性LDO
A high stability LDO for high power audio amplifier
周庆波 1梁栋程 1王淑杰 1黄武康 2王晓敏1
作者信息
- 1. 中国工程物理研究院 计量测试中心，四川 绵阳 621999
- 2. 中科院 嘉兴微电子与系统工程中心，浙江 嘉兴 314006
- 折叠
摘要
Abstract
A high stability Low Dropout Linear Regulator(LDO) is designed for high power audio amplifier. The structure and operational principle are analyzed, and the charging circuit, the stability of the loop and the power supply rejection are described in detail. The circuit is implemented in 0.18μm 1P4M BCDMOS technology. Based on various corner models, Cadence Spectre simulation results show that the maximum temperature coefficient of the LDO circuit is 47.45 ppm/℃, the maximum overshoot of output voltage of 50 mV, the minimum Power Supply Rejection(PSR) of 71 dB@1 kHz, the operating voltage of 5 V-24 V, and the output voltage of the LDO of 3.3 V. Based on tt(transit time) models and the operating voltage of 18 V, the simulation results of the high power audio amplifier show that the output voltage of the LDO circuit comes to steady state within 30μs and can track the load current changes of the LDO.关键词
低压差线性稳压器/大功率音频功放/高稳定性/电源抑制Key words
Low-Dropout Linear Regulator/high power audio amplifier/high stability/power supply rejection分类
信息技术与安全科学引用本文复制引用
周庆波,梁栋程,王淑杰,黄武康,王晓敏..一种用于大功率音频功放的高稳定性LDO[J].太赫兹科学与电子信息学报,2013,(3):484-488,5.
