摘要
介绍了一种采用BCD工艺制作的可工作于高输入电压的低噪声负压型低压差线性稳压器(LDO)。分析了高输入电压和噪声对电路的影响,采用预稳压电路得到供大部分模块工作的内部低压电压域,减小了芯片面积,也保证了电路的可靠性。采用低通滤波器电路,滤波基准电压,降低了输出噪声。该LDO芯片核心部分面积为800μm×1050μm,样品电路测试表明,在漏失电压250 mV下,最大可提供600 mA的负载电流。该LDO在输入电压−6 V,输出电压−5 V,负载电流500 mA时,1 KHz处的噪声约为−110 dBV/√Hz。
A low-noise negative voltage low dropout linear regulator(LDO)based on BCD process was presented.Effect of high input voltage and noise on the circuit was analyzed.Most circuits worked under inner low-voltage region obtained by pre-stabilization circuit,which save the area and ensure the reliability of the circuit.Low pass filter was used to filter reference,which reduce the output noise.The LDO with a core chip area of 800μm×1050μm was taped out.The test results showed that maximum load current of 600 mA was provided by the LDO,under the dropout voltage of 250 mV.The noise was about−110 dBV/√Hz at 1 KHz with load current 500 mA,when the input voltage was−6 V and the output voltage was−5 V.
作者
李飞宇
陈君涛
朱安康
周爵
LI Feiyu;CHEN Juntao;ZHU Ankang;ZHOU Jue(SUNV Electronics Technology Co.,Ltd.,Suzhou,Jiangsu 215000,P.R.China)
出处
《微电子学》
北大核心
2025年第3期424-429,共6页
Microelectronics
关键词
负压
高压
低噪声
预稳压
低压差线性稳压器
negative voltage,high voltage,low noise
pre-stabilization
low dropout regulator
