Adjustable Shunt Regulator
可调节式稳压管
TL431A
产品特性
Features
可编程输出电压到
36V
Programmable output voltage to 36V
½输出阻抗
0.2Ω
Low dynamic output impedance 0.2Ω
输出噪声电压½
Low output noise voltage
响应速度快
Fast turn on response
超过额定温度范围的温度补偿
Temperature compensated for operation over full
rated operating temperature range
封装½式 Package
.
123
1:R 2:A 3:K
方框图
Block diagram
绝对最大额定值
Absolute Maximum Rating
(Ta = 25 C unless otherwise noted)
Parameter
项目
输入电压
Input Voltage
功率损耗
Power Dissipation
工½温度
Operating Temperature
存储温度
Storage Temperature Range
阴极电压
Cathode Voltage
阴极电流
Cathode Current
Symbol
符号
Vka
P
D
Topr
T
STG
V
KA
I
KA
Limit
极限值
37
770
-40~+85
-65~+150
V
REF
~36
0.5~100
Unit
V
mW
℃
℃
V
mA
o
1
Ver-1.0
电参数特性
Electrical Characteristics
(Ta=25 C， unless otherwise specified.)
Parameter
项目
参考输入电压
Reference Input voltage
参考输入电压的温度变化率
Deviation of reference input
voltage over temperature
参考输入电压与阴极电压的变化
率
Ratio of change in reference
input voltage to the change in
cathode voltage
参考输入电流
Reference input current
参考输入电流的温度变化率
Deviation of reference input
current over full temperature
range
最小阴极电流
Minimum cathode current for
regulation
关态阴极电流
Off-stage cathode current
动态阻抗
Dynamic impedance
Symbol
符号
V
REF
∆V
REF
/∆T
Test Condition
测试条件
V
KA
=V
REF
,I
KA
=10mA
V
KA
=V
REF
,I
KA
=10mA
T
MIN
≤T
A
≤T
MAX
∆V
KA
=10V~ V
REF
∆V
REF
/∆V
KA
I
KA
=10mA
∆V
KA
=36V~10V
I
REF
I
KA
=10mA, R1=10KΩ，R2=∞
I
KA
=10mA, R1=10KΩ，R2=∞,
T
a
=full Temperature
-
--
-0.5
1
-2.0
2
µA
Min
最小值
2.445
-
-
Typ
典型值
2.5
4.5
-1.0
Max
最大值
2.55
25
-2.7
mV/V
Unit
单½
V
mV
o
∆I
REF
/∆T
-
0.2
0.4
µA
I
KA
(MIN)
I
KA
(OFF)
Z
KA
V
KA
=V
REF
V
KA
=36V,V
REF
=0
V
KA
=V
REF
, I
KA
=1to 100mA f≤1kHz
-
-
-
0.3
40
0.15
0.5
-
0.5
mA
µV
Ω
典型特性曲线
Typical performance characteristics
2
Ver-1.0
单片机
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