← 返回 JSSC 论文列表JSSC 2010第11期Power Management90nmLDO
A Low-Power Fast-Transient 90-nm Low-Dropout Regulator With Multiple Small-Gain
提出一种90纳米低功耗快速瞬态低压差稳压器,采用多小增益级提升性能。
90nm CMOS, 1V供电, 0.9V输出, 50mA最大输出电流, 9.3μA静态电流
低压差稳压器小增益级纳米级集成电路功率效率瞬态响应
▸创新点1:采用通道电阻不敏感的小增益级(方法创新)。通过设计对通道电阻变化不敏感的多级小增益结构,显著提升了环路增益和带宽,无需在单位增益频率前引入低频极点,从而同时改善了LDO的精度和响应速度。
▸创新点2:无需片内补偿电容(电路创新)。通过优化增益级设计,完全省去了传统LDO中必需的片内补偿电容,将芯片面积缩减至72.5μm×37.8μm,同时保持稳定性,解决了纳米级工艺下面积与补偿的矛盾。
▸创新点3:显著提升线路和负载瞬态响应(性能创新)。实验结果显示,在1V供电下输出0.9V/50mA时,静态电流仅9.3μA,且PSRR和瞬态响应性能显著优于传统架构,特别适合纳米级数字/RF系统的电源噪声抑制需求。
▸创新点4:多级小增益协同优化(系统创新)。通过创新性地组合多个小增益级而非传统单级高增益结构,在90nm工艺下实现功耗(1V供电)、面积(0.0027mm²)与动态性能(快速瞬态响应)的协同突破,为纳米级PMIC设计提供新范式。
Abstract
g Leung , Senior Member , IEEE, and Ki-Leung Mak
Abstract—A power-efficient 90-nm low-dropout regulator
(LDO) with multiple small-gain stages is proposed in this paper.
The proposed channel-resistance-insensitive small-gain stages pro-
vide loop gain enhancements without introducing low-frequency
poles before the unity-gain frequency (UGF). As a result, both the
loop gain and bandwidth of the LDO are improved, so that the
accuracy and response speed of voltage regulation are significantly
enhanced