应用于开关电源控制芯片的欠压锁存电路的设计  

The Design of the Undervoltage Lockout Circuit for SMPS IC

作　　者：江厚礼[1] 庄华龙[1] 孙伟锋[2] 

机构地区：[1]东南大学集成电路学院,南京210096 [2]东南大学国家ASIC工程中心,南京210096

出　　处：《电子器件》2010年第4期447-450,共4页Chinese Journal of Electron Devices

摘　　要：针对单片开关电源控制芯片设计了一种欠压锁存电路,该电路结构简单,无需使用基准电压源,具有功耗低,响应速度快等优点,并可以实现滞回功能。最后在CSMC0.5μmCMOS工艺库下使用CadenceSpectre进行了仿真验证,结果表明,芯片正常工作时,欠压锁存电路的平均功耗低于10mW,响应速度较快,而且电路实现了滞回功能,滞回电压范围为800mV左右。An undervoltage lockout circuit for SMPS control ICs was designed.The structure of the circuit is simple without reference voltage source,and it has some advantages,such as low power consumption,fast response.It can also achieve hysteresis function.Cadence Spectre can be used to simulate the circuit with CSMC 0.5 μm CMOS process.The result indicates power dissipation of the circuit is below 10 mW,its response speed is fast.It realizes hysteresis function and the hysteresis range is near 800 mV.

关 键 词：集成电路技术 欠压锁存 单片开关电源 低功耗 滞回功能 

分 类 号：TN432[电子电信—微电子学与固体电子学]