Programmable Output Voltage Dynamic Output Impedance Sink Current Capa

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Programmable Output Voltage Dynamic Output Impedance Sink Current Capa

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Programmable Precision Reference
Programmable Output Voltage Dynamic Output Impedance Sink Current Capability Equivalent Full-Range Temperature Coefficient ppm/oC Temperature Compensated Operation over Full Rated Operating Temperature Range Output Noise Voltage Fast Turn Response TO-92, SOP- SOT-23, SOT-89 packages
TL431
CONNECTIONS
ANODE
REFERENCE
CATHODE
DESCRIPTION
TL431 three-terminal adjustable regulator series with guaranteed thermal stability over applicable temperature ranges. output voltage value between Vref (approximately volts) volts with external resistors. These devices have typical dynamic output impedance 0.2. Active output circuitry provides very sharp turn-on characteristic, making these devices excellent replacement zener diodes many applications. TL431 characterized operation from
SYMBOL
FUNCTIONAL BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
(Operating temperature range applies unless otherwise specified) Characteristic Cathode Voltage Cathode Current Range (Continuous) Reference Input Current Range Power Dissipation SOP, Package C/W) Package C/W) Junction Temperature Range Operating Temperature Range Storage Temperature Range
Symbol IREF
Value -100 0.05
Unit
Tstg
+150
Rev.
TL431
RECOMMENDED OPERATING CONDITIONS
Characteristic Cathode Voltage Cathode Current Symbol Test Condition VREF Unit
ELECTRICAL CHARACTERISTICS
25oC, VREF, 10mA unless otherwise specified) Characteristic Reference Input Voltage Symbol VREF Test Condition VREF, 10mA 2.440 TL431 (2%) TL431-A (1%) TL431-C (0.5%) Deviation Reference Input Voltage Over Full Temperature Range Ratio Change Reference Input Voltage Change Cathode Voltage Reference Input Current Deviation Reference Input Current Over Full Temperature Range Minimum Cathode Current Regulation Off-State Cathode Current Dynamic Impedance VREF(dev) Tmin Tmax 2.470 2.482 2.495 2.495 2.495 2.550 2.520 2.508 Unit
IREF IREF(dev)
10V-VREF 36V- 10K, 10K,
-1.4 -1.0
-2.7 mV/V -2.0
IK(min) IK(off) VREF 10mA 1.0KHz
0.25 0.26 0.22
TEST CIRCUITS
Figure Test Circuit VREF Figure Test Circuit VREF Figure Test Circuit
INPUT
(OFF)
TL431
TL431
BT432 TL431
Rev.
TL431
Electrical Characteristics
(Continued)
average temperature coefficient reference input voltage, VREF, defined
Where: full temperature change (0-70°C). VREF positive negative depending whether slope positive negative. Example: VDEV VREF 2495 70°C, slope positive.
Note dynamic output impedance, defined
When device programmed with external resistors, (see Figure dynamic output impedance overall circuit, defined
Rev.
TL431
Equivalent Circuit
Typical Performance Characteristics
Input Current Thermal Information
Input Current
Dynamic Impedance Frequency
Rev.
TL431
Typical Performance Characteristics
Stability Boundary Conditions
(Continued)
Note: areas under curves represent conditions that cause device oscillate. curves were adjusted establish initial conditions with were then adjusted determine ranges stability.
Test Circuit Curve Above
Test Circuit Curves Above
Typical Applications
Shunt Regulator
Single Supply Comparator with Temperature Compensated Threshold
Rev.
TL431
Typical Applications
(Continued)
Higher Current Shunt Regulator Series Regulator
Crow
Output Control Three Terminal Fixed Regulator
Rev.
TL431
Typical Applications
(Continued) Over Voltage/Under Voltage Protection Circuit
Voltage Monitor
Rev.
TL431
Typical Applications
(Continued)
Current Limiter Current Source
Delay Timer
Constant Current Sink
Rev.
TL431 Ordering Information
Product Number TL431CLF TL431CLS TL431CD TL431CS TL431CP TL431ALF TL431ALS TL431AD TL431AS TL431AP TL431LF TL431LS TL431D TL431S TL431P Reference Input Voltage Package TO-92 0.5% 8-SOP SOT-23 SOT-89 TO-92 8-SOP SOT-23 SOT-89 TO-92 8-SOP SOT-23 SOT-89
Package Dimensions
SUFFIX SOIC 012AA) Dimension,
Symbol
4.80 3.80 1.35 0.33 0.40 1.27 5.72 0.10 0.19 5.80 0.25
5.00 4.00 1.75 0.51 1.27
0.25 (0.010)
SEATING PLANE
0.25 0.25 6.20 0.50
NOTES: Dimensions include mold flash protrusion. Maximum mold flash protrusion 0.15 (0.006) side 0.25 (0.010) side.
Rev.
TL431
TO-92
Rev.
TL431
Rev.
TL431
Rev.

Programmable Output Voltage Dynamic Output Impedance Sink Current Capa

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