一个3.0-V,高精度,高PSRR BGR,具有高订单补偿和改进的FVF预调节
Yongkang Shen1, Jianhai Yu2, Fading Xiao3
1School of Computer, Electronics and Information, Guangxi University, Nanning 530004, China.
Micromachines
|December 31, 2025
概括
本研究为电池管理集成电路 (BMIC) 提供了精确的3.0V带隙参考 (BGR),具有低温度系数 (TC) 和高电源拒绝比率 (PSRR) 以提高性能.
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
- 半导体设备 半导体设备
背景情况:
- 带隙引用 (BGR) 对于集成电路中稳定的电压产生至关重要.
- 电池管理集成电路 (BMIC) 需要精确的电压参考值来准确地监控和控制电池.
- 传统的BGR设计往往在温度稳定性和电源噪声方面扎.
研究的目的:
- 开发一个非常精确的3.0V带隙参考 (BGR),适用于电池管理集成电路 (BMIC).
- 提高BGR的温度系数 (TC) 和电源拒绝比率 (PSRR).
- 为了提高电压参考电路的整体精度和噪声免疫性.
主要方法:
- 实施了基电流校正技术,以减轻双极结晶体管 (BJT) 的基电流错误.
- 使用一个高阶温度补偿电路来解决BJT基础发射电压 (VBE) 非线性.
- 集成了改进的翻转电压追随器 (FVF) 预调结构,以有效地抑制电源噪声.
- 使用180nm BiCMOS工艺设计了电路.
主要成果:
- 在-40°C至125°C范围内达到1.59 ppm/°C的低温度系数 (TC).
- 在4.7V至5.3V供应范围内,证明了0.00058mV/V的优异线路调节.
- 获得了高PSRR的-128.89 dB在1 Hz和-102.9 dB在1 kHz.
- 静止电流测量在23μA的5.0V供应.
结论:
- 提出的3.0V BGR为BMIC应用提供了卓越的精度和稳定性.
- 使用的技术有效地提高了TC和PSRR,这对于可靠的电池管理至关重要.
- 该设计适合集成到紧的BMIC系统中,因为其布局面积小 (0.0459 mm2).
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