Image TL431
型号: TL431
厂商: ON Semiconductor ON Semiconductor
标准:
分类: 电源
描述: programmable precision references
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TL431,A,BSeries,  
NCV431A  
Programmable�  
PrecisionReferences  
The TL431, A, B integrated circuits are three−terminal  
programmable shunt regulator diodes. These monolithic IC voltage  
references operate as a low temperature coefficient zener which is  
TO−92 (TO−226)  
LP SUFFIX  
CASE 29  
programmable from V to 36 V with two external resistors. These  
ref  
devices exhibit a wide operating current range of 1.0 mA to 100 mA  
with a typical dynamic impedance of 0.22 W. The characteristics of  
these references make them excellent replacements for zener diodes in  
many applications such as digital voltmeters, power supplies, and op  
amp circuitry. The 2.5 V reference makes it convenient to obtain a  
stable reference from 5.0 V logic supplies, and since the TL431, A, B  
operates as a shunt regulator, it can be used as either a positive or  
negative voltage reference.  
Pin 1. Reference  
2. Anode  
1
2
3
3. Cathode  
PDIP−8  
P SUFFIX  
CASE 626  
Features  
8
1
Programmable Output Voltage to 36 V  
Micro8E  
DM SUFFIX  
CASE 846A  
Voltage Reference Tolerance: ±0.4%, Typ @ 25°C (TL431B)  
Low Dynamic Output Impedance, 0.22 W Typical  
Sink Current Capability of 1.0 mA to 100 mA  
8
1
Equivalent Full−Range Temperature Coefficient of 50 ppm/°C  
1
2
3
4
8
7
6
5
Cathode  
N/C  
Reference  
N/C  
Typical  
Temperature Compensated for Operation over Full Rated Operating  
Temperature Range  
N/C  
Anode  
N/C  
N/C  
Low Output Noise Voltage  
(Top  
Pb−Free Packages are Available  
View)  
SOIC−8  
D SUFFIX  
CASE 751  
8
1
1
8
Cathode  
Reference  
Anode  
2
3
4
7
6
5
Anode  
N/C  
N/C  
(TopView)  
This is an internally modified SOIC−8 package. Pins 2, 3, 6 and  
7 are electrically common to the die attach flag. This internal  
lead frame modification increases power dissipation capability  
when appropriately mounted on a printed circuit board. This  
modified package conforms to all external dimensions of the  
standard SOIC−8 package.  
ORDERING INFORMATION  
DEVICE MARKING INFORMATION  
Semiconductor Components Industries, LLC, 2005  
1
Publication Order Number:  
March, 2005 − Rev. 21  
TL431/D  

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