LM7808A中文资料-

Electrical Characteristics (MC7808A)LM7808A
(Refer to the test circuits. 0℃ < TJ < 125℃, Io =1A, V I =14V, C I=0.33iF, C O=0.1iF, 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	V
Output Voltage 输出电压	VO	IO =5mA to 1A, PO ≤15W VI =10.6V to 23V		7.7	8	8.3	V
Line Regulation 线性调整率 (Note1)	Regline	VI=10.6V to 25V IO =500mA			6	80	mV
		VI=11V to 17V		-	3	80	mV
		TJ =+25℃	VI=10.4V to 23V	-	6	80
		TJ =+25℃	VI=11V to 17V	-	2	40
Load Regulation 负载调整率 (Note1)	Regload	TJ =+25℃ IO =5mA to 1.5A		-	12	100	mV
		IO =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	mA
		VI =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
Input Voltage输入电压	(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