TL431A Fairchild Semiconductor, TL431A Datasheet

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TL431A

Manufacturer Part Number
TL431A
Description
The TL431/TL431A are three-terminal adjustable regulator series with a guaranteed thermal stability over applicable temperature ranges
Manufacturer
Fairchild Semiconductor
Datasheet

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Features
• Programmable Output Voltage to 36 Volts
• Low Dynamic Output Impedance 0.2
• Sink Current Capability of 1.0 to 100mA
• Equivalent Full-Range Temperature Coefficient of
• Temperature Compensated For Operation Over Full Rated
• Low Output Noise Voltage
• Fast Turn-on Response
©2011 Fairchild Semiconductor Corporation
TL431/TL431A
Programmable Shunt Regulator
50ppm/°C Typical
Operating Temperature Range
Ω
Typical
Description
The TL431/TL431A are three-terminal adjustable regulator
series with a guaranteed thermal stability over applicable
temperature ranges. The output voltage may be set to any
value between V
with two external resistors These devices have a typical
dynamic output impedance of 0.2
provides a very sharp turn-on characteristic, making these
devices excel lent replacement for zener diodes in many
applications.
1. Cathode 2. 3. 6. 7. Anode
8. Ref 4. 5. NC
1. Ref 2. Anode 3. Cathode
1.Cathode 2.3.4.5.7.NC
6.Anode 8.Ref
TO-92
8-SOP
8-DIP
1
1
1
REF
(approximately 2.5 volts) and 36 volts
www.fairchildsemi.com
Ω
. Active output circuitry
Rev. 1.0.4

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TL431A Summary of contents

Page 1

... Operating Temperature Range • Low Output Noise Voltage • Fast Turn-on Response ©2011 Fairchild Semiconductor Corporation Description The TL431/TL431A are three-terminal adjustable regulator Ω Typical series with a guaranteed thermal stability over applicable temperature ranges. The output voltage may be set to any value between V with two external resistors These devices have a typical dynamic output impedance of 0 ...

Page 2

... 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 D, LP Suffix Package P Suffix Package Operating Temperature Range Junction Temperature Storage Temperature Range Recommended Operating Conditions ...

Page 3

... Range KA(MIN) KA REF I V =36V KA(OFF) KA REF REF 100mA ≥1.0KHz TL431 TL431A Min. Typ. Max. Min. Typ. Max. 2.440 2.495 2.550 2.470 2.495 2.520 - 4 4 1.0 -2.7 - -1.0 - -0.5 -2.0 - -0 1.5 - 0.4 1.2 - 0.4 - 0.45 1.0 - 0.45 - 0.05 1.0 - 0.05 - 0.15 0.5 - 0.15 TL431/TL431A Unit -2.7 mV/V -2.0 μA 4 μA 1.2 1.0 mA μA 1.0 Ω 0.5 3 ...

Page 4

... TL431/TL431A Test Circuits Figure 1. Test Circuit for V Figure 3. Test Circuit for l 4 TL431 REF TL431/A KA(OFF) TL431/A ≥V Figure 2. Test Circuit for V KA REF ...

Page 5

... Typical Perfomance Characteristics Figure 1. Cathode Current vs. Cathode Voltage Figure 3. Change In Reference Input Voltage vs. Cathode Voltage Figure 5. Small Signal Voltage Amplification vs. Frequency Figure 2. Cathode Current vs. Cathode Voltage Figure 4. Dynamic Impedance Frequency Figure 6. Pulse Response TL431/TL431A 5 ...

Page 6

... TL431/TL431A Typical Application R ⎛ ⎞ ------ - ⎝ ⎠ O ref R 2 TL431/A Figure 10. Shunt Regulator TL431/A Figure 13. Current Limit or Current Source 6 R ⎛ ⎞ 1 ------ - ⎝ ⎠ O ref R 2 MC7805/LM7805 TL431/A Figure 11. Output Control for Three- Termianl Fixed Regulator Figure 14. Constant-Current Sink R ⎛ ...

Page 7

... Mechanical Dimensions Package 4.58 0.46 ±0.10 1.27TYP ±0.20 [1.27 ] 3.60 TO-92 +0.25 –0.15 1.27TYP ±0.20 [1.27 ] ±0.20 (R2.29) TL431/TL431A +0.10 0.38 –0.05 7 ...

Page 8

... TL431/TL431A Mechanical Dimensions Package ±0.20 6.40 ±0.008 0.252 #1 #4 7.62 0.300 8 (Continued) 8-DIP #8 #5 5.08 MAX 0.200 3.40 ±0.20 ±0.008 0.134 3.30 ±0.30 ±0.012 0.130 0.33 MIN 0.013 ...

Page 9

... Mechanical Dimensions Package #1 #4 0.236 0.156 ±0.20 0.50 ±0.008 0.020 (Continued) 8-SOP ±0.20 1.55 0.061 ±0.008 #8 #5 6.00 ±0.30 1.80 MAX ±0.012 0.071 ±0.20 3.95 ±0.008 5.72 0.225 TL431/TL431A 0.1~0.25 MIN 0.004~0.001 9 ...

Page 10

... TL431/TL431A Ordering Information Product Number Output Voltage Tolerance TL431ACLP TL431ACD TL431CLP TL431CP TL431CD DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS ...

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