LM7812A中文资料

Electrical Characteristics 电气特性 (MC7812A/LM7812A)

(Refer to test circuit参照测试电路 ,0°C TJ 125°C, IO = 500mA, VI = 10V, CI= 0.33ìF, CO= 0.1ìF, 除非另有说明)

Electrical Characteristics (MC7812A)
(Refer to the test circuits. 0℃ TJ 125℃, Io =1A, V I =19V, 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 VOTJ =+25℃ 11.75 12 12.25 VIO =5mA to 1A, PO ≤15W VI =14.8V to 27V 11.5 12 12.5 Line Regulation 线性调整率 (Note1) ReglineVI=14.8V to 30V IO =500mA -1010mVVI=16V to 22V -4 120TJ =+25℃VI=14.5V to 27V -10 120mVVI=16V to 22V -3 60 Load Regulation 负载调整率 (Note1) RegloadTJ =+25℃ IO =5mA to 1.5A -12 100 mVIO =5mA to 1.0A -12 100IO =250mA to 750mA -5 50 Quiescent Current 静态电流 IQTJ =+25℃ -5.1 6.0 mA Quiescent Current Change 静态电流变化 ΔIQVI =15V to 30V, TJ=+25℃ -0.8 mAVI =14V to 27V, IO =500mA -0.8IO =5mA to 1.0A -0.5 Output Voltage Drift 输出电压漂移 ΔV/ΔT IO =5mA --1.0 -mV/℃ Output Noise Voltage 输出噪声电压 VNf =10Hz to 100KHz TA =+25℃ -10 -μV/Vo Ripple Rejection 纹波抑制 RRf =120Hz, IO =500mA VI =14V to 24V -60 -dB Dropout Voltage 电压差 VDropIO =1A, TJ =+25℃ -2.0 -V Output Resistance 输出电阻 rOf =1KHz -18 -mΩ Short Circuit Current 短路电流 ISCVI=35V, TA =+25℃ -250 -mA Peak 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 (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