lm7812是指三端稳压集成电路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。
常见的三端稳压集成电路有正电压输出的lm78×× 系列和负电压输出的lm79××系列。
ElectricalCharacteristics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)
三端稳压集成电路lm7812。电子产品中，顾名思义，三端IC是指这种稳压用的集成电路，只有三条引脚输出，分别是输入端、接地端和输出端。它的样子象是普通的三极管，TO-220的标准封装，也有lm9013样子的TO-92封装。
|
Parameter 参数 |
Symbol 符号 |
Conditions 条件 |
最小 |
典型 |
单位 | ||
|
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 |
|
Parameter 参数 |
Symbol 符号 |
Value |
单位 |
|
Input Voltage输入电压 |
VI (for VO =5V to 18V) |
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 |
℃ |
