Programmable Shunt Regulator Programmable output voltage volts dy

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Programmable Shunt Regulator Programmable output voltage volts dy

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TL431/TL431A
Programmable Shunt Regulator
Programmable output voltage volts dynamic output impedance 0.20 typical Sink current capability 100mA Equivalent full-range temperature coefficient 50ppm/ typical Temperature compensated operation over full rated operating temperature range output noise voltage Fast turn-on response
Description
TL431/TL431Aare 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 0.2W Active output circuitry provides very sharp turn-on characteristic, making these devices excel lent replacement zener diodes many applications.
TO-92
Arode Cathode 8-DIP
8-SOP
Cathode Arode
Rev. 1.0.1
©2001 Fairchild Semiconductor Corporation
TL431/TL431A
Internal Block Diagram
Absolute Maximum Ratings
(Operating temperature range applies unless otherwise specified.) Parameter Cathode Voltage Cathode current Range (Continuous) Reference Input Current Range Power Dissipation Suffix Package Suffix Package Operating Temperature Range Storage Temperature Range Symbol IREF TOPR TSTG Value -100~ 0.05~ 1000 Unit
Recommended Operating Conditions
Parameter Cathode Voltage Cathode Current Symbol VREF Unit
TL431/TL431A
Electrical Characteristics
+25°C, unless otherwise specified) Parameter
Reference Input Voltage Deviation Reference Input Voltage OverTemperature (Note Ratio Change Reference Input Voltage Change Cathode Voltage Reference Input Current Deviation Reference Input Current Over Full Temperature Range Minimum Cathode Current Regulation Stage Cathode Current Dynamic Impedance (Note IREF
Symbol
VREF
Conditions
VKA=VREF, IKA=10mA VKA=VREF, IKA=10mA TMINTATMAX =10mA
TL431 Min. Typ.
TL431A Max. Min. Typ. Max.
Unit
2.440 2.495 2.550 2.470 2.495 2.520
VREF/ VREF/
-0.5
-2.0
-0.5
VKA=10VVREF VKA=36V10V
mV/V -2.0
IKA=10mA, R1=10K,R2= IKA=10mA, R1=10K,R2= =Full Range VKA=VREF VKA=36V, VREF=0 VKA=VREF, IKA=1 100mA 1.0KHz
IREF/T
IKA(MIN) IKA(OFF)
0.45 0.05
0.45 0.05
0.15
0.15
TMIN= TMAX=
TL431/TL431A
Test Circuits
TL431/A
TL431/A
Figure Test Circuit VKA=VREF
Figure Test Circuit VKAVREF
TL431/A
Figure Test Circuit lKA(OFF)
TL431/TL431A
Typical Perfomance Characteristics
Figure Cathode Current Cathode Voltage
Figure Cathode Current Cathode Voltage
Figure Change Reference Input Voltage Cathode Voltage
Figure Dynamic Impedance Frequency
Figure Small Signal Voltage Amplification Frequency
Figure Pulse Response
TL431/TL431A
Typical Application
MC7805/LM7805
TL431/A
TL431/A TL431/A
Figure Shunt Regulator
Figure Output Control ThreeTermianl Fixed Regulator
Figure High Current Shunt Regulator
TL431/A
TL431/A
Figure Current Limit Current Source
Figure Constant-Current Sink
TL431/TL431A
Mechanical Dimensions
Package
TO-92
4.58 -0.15
+0.25
14.47 ±0.40
0.46 ±0.10
4.58 ±0.20
1.27TYP [1.27 ±0.20] 3.60 ±0.20
1.27TYP [1.27 ±0.20]
0.38 -0.05
+0.10
3.86MAX
1.02 ±0.10
0.38 -0.05
+0.10
(R2.29)
(0.25)
TL431/TL431A
Mechanical Dimensions (Continued)
Package
8-DIP
0.018 ±0.004 1.524 ±0.10 0.060 ±0.004 0.46 ±0.10
6.40 ±0.20 0.252 ±0.008
9.20 ±0.20 0.362 ±0.008 9.60 0.378
2.54 0.100
0.79 0.031
5.08 0.200 7.62 0.300 3.40 ±0.20 0.134 ±0.008
3.30 ±0.30 0.130 ±0.012 0.33 0.013
0.25 -0.05
0~15°
+0.10
0.010 -0.002
+0.004
TL431/TL431A
Mechanical Dimensions (Continued)
Package
8-SOP
1.55 ±0.20 0.061 ±0.008 0.1~0.25 0.004~0.001
4.92 ±0.20 0.194 ±0.008 5.13 0.202
0.56 0.022
6.00 ±0.30 0.236 ±0.012
+0.10 0.15 -0.05 +0.004 0.006 -0.002
1.80 0.071
MAX0.10 MAX0.004
3.95 ±0.20 0.156 ±0.008
5.72 0.225 0.50 ±0.20 0.020 ±0.008
1.27 0.050
0.41 ±0.10 0.016 ±0.004
TL431/TL431A
Ordering Information
Product Number TL431ACLP TL431ACD TL431CLP TL431CP TL431CD Output Voltage Tolerance Package TO-92 8-SOP TO-92 8-DIP 8-SOP Operating Temperature
TL431/TL431A
TL431/TL431A
DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES RIGHT MAKE CHANGES WITHOUT FURTHER NOTICE PRODUCTS HEREIN IMPROVE RELIABILITY, FUNCTION DESIGN. FAIRCHILD DOES ASSUME LIABILITY ARISING APPLICATION PRODUCT CIRCUIT DESCRIBED HEREIN; NEITHER DOES CONVEY LICENSE UNDER PATENT RIGHTS, RIGHTS OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS AUTHORIZED CRITICAL COMPONENTS LIFE SUPPORT DEVICES SYSTEMS WITHOUT EXPRESS WRITTEN APPROVAL PRESIDENT FAIRCHILD SEMICONDUCTOR CORPORATION. used herein: Life support devices systems devices systems which, intended surgical implant into body, support sustain life, whose failure perform when properly used accordance with instructions provided labeling, reasonably expected result significant injury user.
www.fairchildsemi.com 4/17/01 0.0m Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation
critical component component life support device system whose failure perform reasonably expected cause failure life support device system, affect safety effectiveness.

Programmable Shunt Regulator Programmable output voltage volts dy

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