双极型高精度大负载电流集成电压基准源设计  

Design of Integrated Voltage Reference with High-Precision and Large Load Current Based on Bipolar IC Process

作　　者：杨发顺[1,2] 马奎[1,2] 林洁馨[1,2] 丁召[1,2] 傅兴华[1,2] 

机构地区：[1]贵州大学电子科学系,贵阳550025 [2]贵州大学贵州省微纳电子与软件技术重点实验室,贵阳550025

出　　处：《半导体技术》2010年第6期598-602,共5页Semiconductor Technology

基　　金：贵州省工业科技攻关项目(黔科合GY字[2008]3033);贵州大学研究生创新基金资助项目(省研理工2009003)

摘　　要：设计并实现了一种基于双极型工艺的2.5 V高精度大负载电流集成基准电压源电路,通过对传统带隙基准电路的改进,设计中增加了电源电压分配电路、电流反馈电路和大电流驱动电路,实现高精度大负载电流的目标。通过Cadence软件平台下的Spectre仿真器对电路的温度系数、负载调整率、噪声、交流电源纹波抑制比、负载电流、启动时间等电参数进行仿真验证,得到了初始精度±0.5%,在-40～85℃范围内温度系数小于6×10-6/℃,负载电流0～50 mA,电源电压4.5～36 V,输出为2.5 V的集成电压基准源电路。该电路采用6μm/36 V双极型工艺生产制造,芯片面积为1.7 mm×2.1 mm,具有过热保护、过流保护和反接保护功能。Based on bipolar IC process,a 2.5 V high-precision voltage reference of large current was designed and achieved.The aims of high-precision and large load current were achieved by improving the traditional band-gap voltage reference circuit and adding the distributor circuit of power supply,current feedback circuit and large current driving circuit.The temperature coefficient,the load regulation,the noise,the PSRR,the load current and the start-up time of the circuit were verified in the Spectre simulator with Cadence platform.The results show that the initial precision is ±0.5%,the temperature coefficient is less than 6×10-6/℃ in-40～85 ℃,the range of load current is 0～50 mA,the range of voltage supply is 4.5～36 V,the output voltage is 2.5 V.This chip was manufactured with 6 μm/36 V bipolar IC process.It covered an area of 1.7 mm×2.1 mm.It has protection functions such as over temperature protection,over current protection and reverse connection protection.

关 键 词：大负载电流 低温度系数 电源抑制比 过热保护 绝对温度比电流 

分 类 号：TN431.1[电子电信—微电子学与固体电子学]