TS431I
Adjustable Precision Shunt Regulator
TO-92
SOT-89
SOT-23
SOP-8
Pin Definition:
1. Cathode 8. Reference
Pin Definition:
1. Reference
2. Anode
Pin Definition:
1. Reference
2. Cathode
3. Anode
2. Anode
3. Anode
4. N/C
7. Anode
6. Anode
5. N/C
3. Cathode
General Description
The TS431I/431AI/431BI integrated circuits are three-terminal programmable shunt regulator diodes. These monolithic
IC voltage references operate as a low temperature coefficient zener which is programmable from Vref to 36 volts with
two external resistors. These devices exhibit a wide operating current range of 1.0 to 100mA with a typical dynamic
impedance of 0.22Ω. 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 2.5volt reference makes it
convenient to obtain a stable reference from 5.0volt logic supplies, and since The TS431I/431AI/431BI operates as a
shunt regulator, it can be used as either a positive or negative stage reference.
Features
Ordering Information
●
Precision Reference Voltage
TS431I – 2.495V±2%
TS431AI – 2.495V±1%
TS431BI – 2.495V±0.5%
Equivalent Full Range Temp. Coefficient: 50ppm/ ºC
Programmable Output Voltage up to 36V
Fast Turn-On Response
Sink Current Capability of 1~100mA
Low Dynamic Output Impedance: 0.2Ω
Low Output Noise
Part No.
TS431xIT B0
TS431xIT A3
TS431xIX RF
TS431xIY RM
TS431xIS RL
Package
TO-92
TO-92
SOT-23
SOT-89
SOP-8
Packing
1Kpcs / Bulk
2Kpcs / Ammo
3Kpcs / 7” Reel
1Kpcs / 7” Reel
2.5Kpcs / 2.5” Reel
●
●
●
●
●
●
Note: Where xx denotes voltage tolerance
Blank: ±2%
A: ±1%
B: ±0.5%
Application
Block Diagram
●
●
●
●
●
●
Voltage Monitor
Delay Timmer
Constant –Current Source/Sink
High-Current Shunt Regulator
Crow Bar
Over-Voltage / Under-Voltage Protection
Absolute Maximum Rating (Ta = 25 oC unless otherwise noted)
Parameter
Symbol
Limit
37
-100 ~ +150
-0.05 ~ +10
0.625
Unit
V
mA
mA
Cathode Voltage (Note 1)
Continuous Cathode Current Range
Reference Input Current Range
Power Dissipation
Vka
Ik
Iref
TO-92
SOT-23
Pd
0.30
W
SOT-89 / SOP-8
0.50
Junction Temperature
Tj
+150
oC
oC
oC
Operating Temperature Range
Storage Temperature Range
Toper
Tstg
-40 ~ +85
-65 ~ +150
Note 1: Voltage values are with respect to the anode terminal unless otherwise noted.
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Version: A07