一个具有低噪音和超低功耗的高PSRR LDO
Nanxiang Guo1,2, Jiagen Cheng3, Chenxi Yue3
1Department of Electrical and Electronic Engineering, Luzhou Vocational & Technical College, Luzhou 646100, China.
Micromachines
|January 28, 2026
概括
本研究介绍了一种新型低掉电调节器 (LDO) 芯片,它实现了高电源拒绝率 (PSRR),低输出噪声和最小的备用电流. 设计的LDO芯片克服了以前的局限性,实现了需要清洁能源的先进应用.
科学领域:
- 集成电路设计 集成电路设计
- 模拟电子产品 模拟电子产品
- 电力管理 电力管理
背景情况:
- 低脱落调节器 (LDO) 芯片对于噪声敏感的应用,如传感器和射频电路至关重要.
- 现有的LDO设计难以同时实现高电源拒绝率 (PSRR),低输出噪声和低待机电流.
- 这些限制限制了LDO在高端应用中的使用.
研究的目的:
- 设计和制造一个新的LDO芯片,集高PSRR,低输出噪声和低备用电流.
- 克服先进电子系统的现有LDO技术的局限性.
- 为了实现需要卓越电源特性的高端应用.
主要方法:
- 增加了循环增益,引入了改进的前路径,并采用了孤立的电源来增强PSRR.
- 优化了误差放大器 (EA) 设计,并整合了一个低通波器来减少输出电压噪声.
- 利用耗尽过程和优化的参考结构来最大限度地降低待机功耗,而不会影响准确度.
主要成果:
- 在1kHz时达到95dB的测量PSRR,在1MHz时超过45dB.
- 测量的集成输出噪声低于5.4μVrms (10Hz至100KHz).
- 在零负载电流下记录了不到400 nA的备用电流.
结论:
- 设计的LDO芯片在PSRR,输出噪声和待机功耗方面表现出色.
- 综合设计成功地解决了高端LDO应用的同时要求.
- 使用SMIC的0.18μm/5V/BCD工艺制造的芯片验证了拟议技术的有效性.
相关概念视频
Power
13.0K
The concept of work involves force and displacement; meanwhile, the work-energy theorem relates the net work done on a body to the difference in its kinetic energy, calculated between two points on its trajectory. While none of these quantities or relations involves time explicitly, we know that the time available to accomplish work is often just as important as the amount of work itself. For example, sprinters in a race may have achieved the same velocity at the finish, therefore,...
13.0K
Instantaneous Power
906
Instantaneous power is important in electrical circuits, mainly when dealing with sinusoidal input. Instantaneous power, denoted as p(t), results from the multiplication of the instantaneous voltage (v(t)) across an element and the instantaneous current (i(t)) flowing through it. This relationship adheres to the passive sign convention and represents a fundamental principle in electrical engineering.
906
Complex Power
902
Power engineers have introduced the concept of complex power to determine the cumulative effect of parallel loads. This idea plays a crucial role in power analysis because it encompasses all the details related to the power consumed by a specific load.
Complex power is defined as the multiplication of the voltage and the complex conjugate of the current. The magnitude of this power, known as apparent power, is measured in volt-amperes (VA). Notably, the angle of the complex power equates to the...
Complex power is defined as the multiplication of the voltage and the complex conjugate of the current. The magnitude of this power, known as apparent power, is measured in volt-amperes (VA). Notably, the angle of the complex power equates to the...
902
Electrical Power
3.8K
Electric power is the product of current and voltage, represented in units of joules per second, or watts. For example, cars often have one or more auxiliary power outlets with which you can charge a cell phone or other electronic devices. These outlets may be rated at 20 amps and 12 volts, so that the circuit can deliver a maximum power of 240 watts. Consider a 25 Watt bulb and a 60 Watt bulb. The conversion of electrical energy produces heat and light, while the kinetic energy lost by the...
3.8K
Sums of Power
66
In definite integration, Riemann sums approximate the area under a curve by dividing it into subintervals and summing the areas of rectangles. When these approximations follow predictable numerical patterns, such as arithmetic or polynomial sequences, sum formulas offer a more efficient and accurate way to compute the result. In particular, the sum of consecutive integers, squares, and cubes plays an essential role in simplifying these calculations, especially when dealing with uniform...
66
Nuclear Power
9.5K
Controlled nuclear fission reactions are used to generate electricity. Any nuclear reactor that produces power via the fission of uranium or plutonium by bombardment with neutrons has six components: nuclear fuel consisting of fissionable material, a nuclear moderator, a neutron source, control rods, reactor coolant, and a shield and containment system.
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...
9.5K


