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LM7805A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 (MC7805A)LM7805A
(Refer to the test circuits. 0℃ < TJ < 125℃, Io =1A, V I =10V, C I=0.33ìF, C O=0.1ìF, unless otherwise specified)


Parameter 参数

Symbol 符号

Conditions 条件

最小

典型

最大

单位

Output Voltage 输出电压 VO TJ =+25℃ 4.9 5 5.1 VIO =5mA to 1A, PO ≤ 15W VI =7.5V to 20V 4.8 5 5.2 Line Regulation 线性调整率 (Note1) Regline VI =7.5V to 25V IO =500mA  5 50 mVVI =8V to 12V -3 50 TJ =+25℃ VI=7.3V to 20V -5 50  VI=8V to 12V -1.5 25 Load Regulation 负载调整率 (Note1) Regload TJ =+25℃ IO =5mA to 1.5A -9 100 mVIO =5mA to 1A -9 100 IO =250mA to 750mA -4 50 Quiescent Current 静态电流 IQ TJ =+25℃ -5.0 6 mA Quiescent Current Change 静态电流变化 ΔIQ IO =5mA to 1A --0.5 mAVI =8 V to 25V, IO =500mA --0.8 VI =7.5V to 20V, TJ =+25℃ --0.8 Output Voltage Drift 输出电压漂移 ΔV/ΔT Io =5mA --0.8 -mV/℃ Output Noise Voltage 输出噪声电压 VN f =10Hz to 100KHz TA =+25℃ -10 -μV/Vo Ripple Rejection 纹波抑制 RR f =120Hz, IO =500mA VI =8V to 18V -68 -dB Dropout Voltage 电压差 VDrop IO =1A, TJ =+25℃ -2 -V Output Resistance 输出电阻 rO f =1KHz -17 -mΩ Short Circuit Current 短路电流 ISC VI=35V, TA =+25℃ -250 -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 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 78XX内部电路图

                   图2 78XX参照测试电路                     图3  外形引脚排列图管脚图

                            图4 纹波抑制电路

                      图5 负载调节控制电路

              图6 与79XX系列三端稳压构成的正负对称输出电压电路图

                            图7 典型应用电路图

                                图8 TO-220封装图片

                                           图9 D-PAK封装图
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