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LM7905中文资料来源于瑞达科技网
作者：佚名  文章来源：网络  点击数  更新时间：2011/1/13   文章录入：瑞达  责任编辑：瑞达科技
Electrical Characteristics 电气特性 (MC7905/LM7905)
(VI = -10V, IO = 500mA, 0℃ ≤TJ ≤ +125℃, CI =2.2μF, CO =1μF, unless otherwise specified.)
Parameter 参数 Symbol 符号 Conditions条件 最小. 典型. 最大. Unit Output Voltage 输出电压 VO TJ=+25℃ - 4.8 - 5.0 - 5.2 VIO = 5mA to 1A, PO ≤ 15W VI = -7V to -20V - 4.75 -5.0 - 5.25 Line Regulation (Note1) 线性调整率 ΔVO

TJ=+25℃

VI = -7V to -20V IO = 1A

-5 50 mV

VI = -8V to -12V IO = 1A

-2 25 VI = -7.5Vto -25V -7 50 VI = -8V to -12V IO = 1A -7 50 Load Regulation 负载调整率(Note1) (Note1) ΔVO TJ = +25℃ IO = 5mA to 1.5A -10 100 mV TJ =+25℃ IO = 250mA to 750mA -3 50 Quiescent Current静态电流 IQ TJ =+25℃ -3 6 mA Quiescent Current Change静态电流变化  ΔIQ IO = 5mA to 1A -0.05 0.5 mA VI = -8V to -25V -0.1 0.8 Temperature Coefficient of VD温度系数 ΔVo/ΔT IO = 5mA -- 0.4 -mV/℃ Output Noise Voltage 输出噪声电压 VN f = 10Hz to 100KHz TA =+25℃ -40 -μV Ripple Rejection 纹波抑制 RR f = 120Hz ΔVI = 10V 54 60 -dB Dropout Voltage 电压差 VD TJ=+25℃ IO = 1A -2 -V Short Circuit Current 短路电流 ISC TJ =+25℃, VI = -35V -300 -mA Peak Current 峰值电流  IPK TJ =+25℃ -2.2 -A

三端稳压集成电路极限参数： Parameter 参数 Symbol 符号 Value 数值单位 Input Voltage输入电压 (for VO =5V to 18V)VI 35 V (for VO =24V)VI 40 V Thermal Resistance Junction-Cases  热阻(结到壳) (TO-220) RθJC 5 ℃/W Thermal Resistance Junction-Air热阻(结到空气) (TO-220) RθJA 65 ℃/W Operating Temperature Range工作温度范围 TOPR 0 ~ +125 ℃ Storage Temperature Range储存温度范围 TSTG -65 ~ +150 ℃

                                           图1 79XX内部电路图

图2  外形引脚排列图管脚图                      图3 79XX参照测试电路及典型电路

                          图4 输出电压                                    图5 负载调节率曲线图

                图6 电压差曲线图                                        图7 静态电流曲线图

                  图8 短路电流曲线图

              图9 与78XX系列三端稳压构成的正负对称输出电压应用电路图

                        图10 TO-220封装图片

 

 
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