LM7812简介

简介三端稳压集成电路lm7812。电子产品中，顾名思义，三端IC是指这种稳压用的集成电路，只有三条引脚输出，分别是输入端、接地端和输出端。它的样子象是普通的三极管，TO-220的标准封装，也有lm9013样子的TO-92封装。详细参数Parameter 参数Symbol 符号Conditions 条件最小典型最大单位Output Voltage 输出电压VOTJ =+25℃11.51212.5V5.0mA ≤ IO≤1.0A, PO≤15W VI =14.5V to 27V11.41212.6Line Regulation 线性调整率 (Note1)ReglineTJ =+25℃VI =14.5V to 30V-10240mVVI =16V to 22V-3.0120Load Regulation 负载调整率 (Note1)RegloadTJ =+25℃IO =5mA to 1.5A-11240mVIO =250mA to 750mA-5.0120Quiescent Current 静态电流IQTJ =+25℃-5.18.0mAQuiescent Current Change 静态电流变化ΔIQIO =5mA to 1.0A-0.10.5mAVI =14.5V to 30V-0.51.0Output Voltage Drift 输出电压漂移ΔVO/ΔTIO =5mA--1-mV/℃Output Noise Voltage 输出噪声电压VNf =10Hz to 100KHz, TA =+25℃-76-μV/VoRipple Rejection 纹波抑制RRf =120Hz VI =15V to 25V5571-dBDropout Voltage 电压差VDropIO =1A, TJ=+25℃-2-VOutput Resistance 输出电阻rOf =1KHz-18-mΩShort Circuit Current 短路电流ISCVI =35V, TA=+25℃-230-mAPeak Current 峰值电流IPKTJ =+25℃-2.2-A三端稳压集成电路极限参数： Parameter 参数Symbol 符号Value单位Input Voltage输入电压VI (for VO =5V to 18V)35V(for VO =24V)VI40VThermal Resistance Junction-Cases 热阻(结到壳) (TO-220)RθJC5℃/WThermal Resistance Junction-Air热阻(结到空气) (TO-220)RθJA65℃/WOperating Temperature Range工作温度范围TOPR0 ~ +125℃Storage Temperature Range储存温度范围TSTG-65 ~ +150℃