Electrical Characteristics 电气特性 (MC7905A) LM7905A
(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 单位 Output Voltage 输出电压 VO TJ=+25℃ - 4.9 - 5.0 - 5.1 V

IO = 5mA to 1A, PO ≤ 15W VI = -7V to -20V

- 4.8 -5.0 - 5.2 Line Regulation 线性调整率(Note1) ΔVO TJ=+25℃

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

- 5 50 mV

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

- 2 25

TJ=+25℃ , VI = -7.5V to -25V

- 7 50

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

- 7 50 Load Regulation 负载调整率(Note1) (Note1) ΔVO

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