LM7918中文资料

lectrical Characteristics 电气特性 (MC7918) LM7918
(VI = -27V, 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℃		-17.3	-18	-18.7	V
		IO = 5mA to 1A, PO ≤ 15W VI = -22.5V to -33V		-17.1	-18	-18.9
Line Regulation 线性调整率(Note1)	ΔVO	TJ=+25℃	VI = -21V to -33V	-	15	360	mV
			VI = -24V to -30V	-	8	180
Load Regulation 负载调整率(Note1) (Note1)	ΔVO	TJ=+25℃ IO = 5mA to 1.5A		-	15	360	mV
		TJ =+25℃ IO = 250mA to 750mA		-	5	180
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		-	-	0.5	mA
		VI = -22V to -33V		-	-	1
Temperature Coefficient of VD 温度系数	ΔVo/ΔT	IO = 5mA		-	-1	-	mV/℃
Output Noise Voltage 输出噪声电压	VN	f = 10Hz to 100KHz TA =+25℃		-	300	-	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