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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 ℃ -17.3 -18.0 -18.7 V Line Regulation 线性调整率(Note1) ΔVO TJ=+25 ℃ -20.7V≥VI≥-33V - - 325 mV -21V≥VI≥-33V - - 275 mV Load Regulation 负载调整率 (Note1) ΔVO TJ=+25 ℃ 1.0mA≤IO≤100mA - - 170 mV 1.0mA≤IO≤40mA - - 85 mV Output Voltage输出电压 VO -20.7V > VI > -33V, 1.0mA≤IO≤40mA -17.1 - -18.9 V VI=-27V, 1.0mA≤IO≤70mA -17.1 - -18.9 V Quiescent Current 静态电流 IQ TJ=+25℃ - - 6.5 mA TJ=+125℃ - - 6.0 Quiescent Current Change 静态电流变化 with line ΔIQ -21V≥VI≥-33V - - 1.5 mA with load ΔIQ 1.0mA≤IO≤40mA - - 0.1 mA Output Noise Voltage 输出噪声电压 VN TA =+25℃,10Hz ≤f≤100KHz - 150 - μV Ripple Rejection 纹波抑制 RR f=120Hz, -23V≥VI≥-33V TJ=+25℃ 33 48 - dB Dropout Voltage 电压差 VD TJ=+25℃ - 1.7 - V
Note
1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
极限参数：
Parameter参数Symbol 符号Value 数值单位Input Voltage输入电压 (for VO = -5V, -8V) VI-30V(for VO = -12V to -18V)-35(for VO = -24V)-40Operating Junction Temperature Range结温工作范围TJ0~ +125℃Storage Temperature Range储存温度范围TSTG-65~ +150℃
图1 LM79LXXX引脚排列图
图2 LM79LXXX内部电路图
图3 LM79LXXX典型测试电路图
图4 正负电压对称输出电路
图5 LM78LXXX TO-92封装图片
图6 LM78LXXX 8-SOP贴片封装图片
图7 LM78LXXX SOT-89贴片封装图片
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