基于0.18μm高压BCD工艺的车载线性稳压器设计  

Design of Automotive Linear Voltage Regulator Based on 0.18μm High-Voltage BCD Process

作　　者：蔡俊[1] 白东虎 Cai Jun;Bai Donghu(School of Electrical and Information Engineering,Anhui University of Science and Technology,Huainan,Anhui 232001,China)

机构地区：[1]安徽理工大学电气与信息工程学院,安徽淮南232001

出　　处：《黑龙江工业学院学报(综合版)》2025年第2期119-125,共7页Journal of Heilongjiang University of Technology(Comprehensive Edition)

基　　金：安徽省自然科学基金项目(项目编号:2108085MF200);安徽高校自然科学重点项目(项目编号:KJ2020A307)。

摘　　要：为了扩大传统低压差线性稳压器(LDO)的输入电压范围,设计了一种适用于汽车的宽输入范围线性稳压器。设计中引入了前置预稳压结构,并集成了二阶补偿的带隙基准电路。在主环路内部,采用了极点追踪极点和零点追踪极点的双重补偿结构,以确保主环路的稳定性。该线性稳压器使用0.18μmBCD工艺实现,支持6.5~45V的宽输入电压范围,稳定输出5V电压。其线性调整率为0.088mV/V,最大可负载电流达到300mA,负载调整率为0.011mV/mA。在-40℃~125℃的温度范围内,基准电压温度系数为2.1ppm/℃。To expand the input voltage range of traditional low-dropout regulator(LDO),a wide input range linear regulator suitable for automotive applications has been designed.The design introduces a prc-stabilizcd voltagc structure and integrates a second-order compensation band gap reference circuit.Inside the main loop,a dual compensation structure featuring pole-tracking poles and zero-tracking poles is adopted to ensure the stability of the main loop.The linear regulator is implemented using 0.18μm BCD process,supporting a wide input voltage range of 6.5-45V and stably outputting 5V voltage.It has a linear tuning ratio of 0.088mV/V,a maximum load current of 300mA,and a load regulation ratio of 0.011mV/mA.The reference voltage temperature coefficient is 2.1ppm/℃within the temperature range of-40℃to 125℃.

关 键 词：线性稳压器 宽输入范围 动态零点补偿 预稳压 

分 类 号：TM44[电气工程—电器] TN402[电子电信—微电子学与固体电子学]