lm7812
lm7812是指三段稳压集成电路IC芯片元器件，适用于各种电源稳压电路，输出稳定性好、使用方便、输出过流、过热自动保护。
Electrical Characteristics 电气特性 (MC7812)(LM7812)(参照测试电路 ,0°C < TJ < 125°C, IO =500mA, VI =19V, CI=0.33ìF, CO=0.1ìF, 除非另有说明)
Parameter 参数
Symbol 符号
Conditions 条件
MC7812 LM7812
单位
最小
典型
最大
Output Voltage 输出电压
VO
TJ =+25℃
11.5
12
12.5
V
5.0mA ≤ IO≤1.0A, PO≤15W VI =14.5V to 27V
11.4
12
12.6
Line Regulation 线性调整率 (Note1)
Regline
TJ =+25℃
VI =14.5V to 30V
-
10
240
mV
VI =16V to 22V
-
3.0
120
Load Regulation 负载调整率 (Note1)
Regload
TJ =+25℃
IO =5mA to 1.5A
-
11
240
mV
IO =250mA to 750mA
-
5.0
120
Quiescent Current 静态电流
IQ
TJ =+25℃
-
5.1
8.0
mA
Quiescent Current Change 静态电流变化
ΔIQ
IO =5mA to 1.0A
-
0.1
0.5
mA
VI =14.5V to 30V
-
0.5
1.0
Output Voltage Drift 输出电压漂移
ΔVO/ΔT
IO =5mA
-
-1
-
mV/℃
Output Noise Voltage 输出噪声电压
VN
f =10Hz to 100KHz, TA =+25℃
-
76
-
μV/Vo
Ripple Rejection 纹波抑制
RR
f =120Hz VI =15V to 25V
55
71
-
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℃
-
230
-
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
(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
℃