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PROGRAMMABLE PRECISION SHUNT REGULATOR
Programmable Output Voltage Guaranteed 0.5% Reference Voltage Tolerance (0.2 Typ.) Dynamic Output Impedance Cathode Current Range(Continuous) Equivalent Full Range Temperature Coefficient 50PPM/ Temperature Compensated Operation Over Full Rate Operating Temperature Range Output Noise Voltage Fast Turn-on Response TO-92, SOT-89 SOT-23 Package TO-92
TL431/A/C
SOT-23
APPLICATION
Shunt Regulator Precision High-Current Series Regulator High-Current Shunt Regulator Crowbar Circuit Converter With Reference Voltage Monitor Precision Current Limiter
SOT-89
DESCRIPSION
TL431 three-terminal adjustable shunt regulator with specified thermal stability over applicable temperature VREF (Approx. 2.5V) with external resistors. This device typical dynamic output impedance 0.2. Active output circuitry provides very sharp turn-on characteristic, making this device excellent replacement zener diodes many applications. TL431 characterized operation from +125.
Reference
ORDERING INFORMATION Device (Marking) TL431 TL431TA TL431SF TL431F
Anode
Cathode
Package TO-92(Bulk) TO-92(Taping) SOT-23 SOT-89
Refer page detailed ordering Information,
Absolute Maximum Ratings
(Operating temperature range applies unless otherwise specified) CHARACTERISTIC
Cathode Voltage Cathode Current Range(Continuous) Reference Input Current Range Junction Temperature Range Storage Temperature Range Operating Temperature Range
2008 Rev.
SYMBOL
IREF TSTG TOPR
MIN.
-100 0.05
MAX.
UNIT
PROGRAMMABLE PRECISION SHUNT REGULATOR
RECOMMENDED OPERATING CONDITIONS
CHARACTERISTIC
Cathode Voltage Cathode Current
TL431/A/C
UNIT
SYMBOL
MIN.
VREF
MAX.
Ordering Information
VREF Package Tolerance Order
TL431C 0.5% TL431GC TL431CTA TL431GCTA TL431A TO-92 TL431GA TL431ATA TL431GATA TL431 TL431G TL431TA TL431GTA 0.5% TL431CSF TL431GCSF TL431ASF TL431GASF TL431SF TL431GSF TL431CF TL431AF TL431F
Package Marking
TL431-C TL431GC TL431-C TL431GC TL431-A TL431GA TL431-A TL431GA TL431 TL431G TL431 TL431G
Supplied
Bulk
Tape
Bulk
Tape
Bulk
2.495V
Tape
Reel
SOT-23
Reel
0.5% SOT-89
Reel Reel Reel Reel
2008 Rev.
PROGRAMMABLE PRECISION SHUNT REGULATOR
TL431/A/C
2008 Rev.
PROGRAMMABLE PRECISION SHUNT REGULATOR
CONFIGURATION
Marking Side
TL431/A/C
TO-92
SOT-23
SOT-89
DESCRIPTION
TO-92 SOT-23 SOT-89 Name
Reference Anode Cathode
Function
Reference Voltage Ground Input Supply Voltage
TL431 ELECTRICAL CHARACTERISTICS
(TA=25, unless otherwise specified)
CHARACTERISTIC
SYMBOL
TEST CONDITION
TL431C
MIN.
2.483 2.470 2.440
TYP.
2.495 2.495 2.495 -1.4 -1.0
MAX.
2.507 2.520 2.550 -2.7 -2.0
UNIT
Reference Input Voltage
VREF
=VREF, =10mA
TL431A TL431
Deviation Reference Input Voltage Ratio Change Reference Input Voltage Change Cathode Voltage Reference Input Current Deviation Reference Input Current Minimum Cathode Current Regulation Off-State Cathode Current Dynamic Impedance
VREF/T
VREF, =10mA =Full Range VKA=10V -VREF
VREF/VKA IREF IREF/T
=10mA VKA=36V-10V IKA=10mA, R1=10, =10mA, R1=10, =Full Range VKA= VREF VKA=36V, VREF=0 VKA= VREF, =1mA~100mA 1kHz 0.17 0.27
mV/V
IK(MIN) IK(OFF)
0.90 0.50
2008 Rev.
PROGRAMMABLE PRECISION SHUNT REGULATOR
TEST CIRCUITS
TL431/A/C
Test circuit VREF
Test circuit VREF
Test circuit IKA(OFF)
2008 Rev.
PROGRAMMABLE PRECISION SHUNT REGULATOR
TL431/A/C
deviation parameters VREF/T IREF/T defined differences between maximum minimum values obtained over recommended temperature range. average full-range temperature coefficient reference voltage, VREF, defined
Where recommended operating free-air temperature range device. VREF positive negative, depending whether minimum VREF maximum VREF, respectively, occurs lower temperature. Example Maximum VREF=2496mV maximum VREF=2492mV VREF=2495mV TA=70 TL431C.
aVREF
2495mV 70°C
Because minimum VREF occurs lower temperature, coefficient positive.
Calculating Dynamic Impedance
dynamic impedance defined
When device operating with external resistors, total dynamic impedance circuit given
2008 Rev.
PROGRAMMABLE PRECISION SHUNT REGULATOR
TYPICAL OPERATING CHARACTERISTICS
REFERENCE VOLTAGE JUNCTION TEMPERATUR
TL431/A/C
PULSE RESPONSE
2.501 2.500
VREF-Reference Voltage Input Output Voltage VKA=VREF IKA=10mA
Input
2.499 2.498 2.497 2.496 2.495 2.494 2.493 2.492
Output
VKA=VREF IKA=10mA TA=25
VREF=2.495V 0.5%
TJ-Junction Temperature
t-Time (us)
CATHODE CURRENT CATHODE VOLTAGE
CATHODE CURRENT CATHODE VOLTAGE
0.15 0.13
IKA-Cathode Current (mA) VKA=VREF TA=25 IKA-Cathode Current (uA)
VKA=VREF TA=25
0.10 0.08 0.05 0.03 0.00 -0.03 -0.05 -0.08 -0.10 -2.0 -1.0
-200 -1.0
VKA-Cathode Voltage
VKA-Cathode Voltage
T.B.D
2008 Rev.
PROGRAMMABLE PRECISION SHUNT REGULATOR
APPICATION INFORMATION
Shunt Regulator
TL431/A/C
Note Should provide cathode current TL431 minimum VI(BATT)
Precision High-Current Series Regulator
Note Should provide cathode current1mA TL431 minimum VI(BATT)
Output Control Three-Terminal Fixed Regulator
2008 Rev.
PROGRAMMABLE PRECISION SHUNT REGULATOR
High-Current Shunt Regulator
TL431/A/C
Precision 1.5A Regulator
Efficient Precision Regulator
NOTE Should provide cathode current1mA TL431.
2008 Rev.
PROGRAMMABLE PRECISION SHUNT REGULATOR
Converter With Reference
TL431/A/C
Voltage Monitor
NOTE selected provide desired intensity cathode current TL431 available VI(BATT).
Delay Timer
2008 Rev.
PROGRAMMABLE PRECISION SHUNT REGULATOR
Precision Current Limiter
TL431/A/C
Precision Constant-Current Sink
2008 Rev.
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