LM7808A中文资料
Electrical Characteristics (MC7808A)LM7808A
(Refer to the test circuits. 0℃ TJ 125℃, Io =1A, V I =14V, 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℃ 7.84 8 8.16 VIO =5mA to 1A, PO ≤15W VI =10.6V to 23V 7.7 8 8.3 Line Regulation 线性调整率 (Note1) Regline VI=10.6V to 25V IO =500mA 680mVVI=11V to 17V -3 80 TJ =+25℃ VI=10.4V to 23V -6 80 VI=11V to 17V -2 40 Load Regulation 负载调整率 (Note1) Regload TJ =+25℃ IO =5mA to 1.5A -12 100 mVIO =5mA to 1A -12 100 IO =250mA to 750mA -5 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 =11V to 25V, IO =500mA --0.8 VI=10.6V to 23V, 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 =11.5V to 21.5V -62 -dB Dropout Voltage 电压差 VDrop IO =1A, TJ =+25℃ -2 -V Output Resistance 输出电阻 rO f =1KHz -18 -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
(Refer to the test circuits. 0℃ TJ 125℃, Io =1A, V I =14V, 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℃ 7.84 8 8.16 VIO =5mA to 1A, PO ≤15W VI =10.6V to 23V 7.7 8 8.3 Line Regulation 线性调整率 (Note1) Regline VI=10.6V to 25V IO =500mA 680mVVI=11V to 17V -3 80 TJ =+25℃ VI=10.4V to 23V -6 80 VI=11V to 17V -2 40 Load Regulation 负载调整率 (Note1) Regload TJ =+25℃ IO =5mA to 1.5A -12 100 mVIO =5mA to 1A -12 100 IO =250mA to 750mA -5 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 =11V to 25V, IO =500mA --0.8 VI=10.6V to 23V, 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 =11.5V to 21.5V -62 -dB Dropout Voltage 电压差 VDrop IO =1A, TJ =+25℃ -2 -V Output Resistance 输出电阻 rO f =1KHz -18 -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8 TO-220封装图片
图9 D-PAK封装图
评论